/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 14:02:34,014 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 14:02:34,018 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 14:02:34,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 14:02:34,075 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 14:02:34,081 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 14:02:34,084 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 14:02:34,089 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 14:02:34,092 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 14:02:34,099 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 14:02:34,100 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 14:02:34,101 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 14:02:34,102 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 14:02:34,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 14:02:34,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 14:02:34,108 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 14:02:34,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 14:02:34,112 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 14:02:34,119 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 14:02:34,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 14:02:34,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 14:02:34,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 14:02:34,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 14:02:34,133 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 14:02:34,154 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 14:02:34,154 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 14:02:34,155 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 14:02:34,157 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 14:02:34,158 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 14:02:34,159 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 14:02:34,159 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 14:02:34,160 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 14:02:34,162 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 14:02:34,162 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 14:02:34,164 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 14:02:34,164 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 14:02:34,165 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 14:02:34,166 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 14:02:34,167 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 14:02:34,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 14:02:34,168 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 14:02:34,176 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 [2020-10-29 14:02:34,225 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 14:02:34,225 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 14:02:34,230 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 14:02:34,230 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 14:02:34,230 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 14:02:34,231 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 14:02:34,231 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 14:02:34,231 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 14:02:34,231 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 14:02:34,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 14:02:34,232 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 14:02:34,233 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 14:02:34,233 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 14:02:34,233 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 14:02:34,233 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 14:02:34,234 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 14:02:34,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 14:02:34,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 14:02:34,234 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 14:02:34,234 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 14:02:34,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 14:02:34,235 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 14:02:34,235 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 14:02:34,235 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 14:02:34,235 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 14:02:34,236 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 14:02:34,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 14:02:34,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 14:02:34,236 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 14:02:34,236 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 14:02:34,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 14:02:34,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 14:02:34,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 14:02:34,719 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 14:02:34,720 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 14:02:34,721 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-29 14:02:34,799 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/477391d1e/ddd023667851442d94a6ccdfe728ffd0/FLAG9bbd7a263 [2020-10-29 14:02:35,528 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 14:02:35,529 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-29 14:02:35,552 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/477391d1e/ddd023667851442d94a6ccdfe728ffd0/FLAG9bbd7a263 [2020-10-29 14:02:35,822 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/477391d1e/ddd023667851442d94a6ccdfe728ffd0 [2020-10-29 14:02:35,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 14:02:35,832 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 14:02:35,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 14:02:35,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 14:02:35,839 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 14:02:35,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 02:02:35" (1/1) ... [2020-10-29 14:02:35,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f0c1dbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:02:35, skipping insertion in model container [2020-10-29 14:02:35,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 02:02:35" (1/1) ... [2020-10-29 14:02:35,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 14:02:35,936 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 14:02:36,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 14:02:36,584 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 14:02:36,844 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 14:02:36,871 INFO L208 MainTranslator]: Completed translation [2020-10-29 14:02:36,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:02:36 WrapperNode [2020-10-29 14:02:36,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 14:02:36,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 14:02:36,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 14:02:36,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 14:02:36,889 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:02:36" (1/1) ... [2020-10-29 14:02:36,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:02:36" (1/1) ... [2020-10-29 14:02:36,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:02:36" (1/1) ... [2020-10-29 14:02:36,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:02:36" (1/1) ... [2020-10-29 14:02:36,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:02:36" (1/1) ... [2020-10-29 14:02:37,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:02:36" (1/1) ... [2020-10-29 14:02:37,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:02:36" (1/1) ... [2020-10-29 14:02:37,018 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 14:02:37,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 14:02:37,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 14:02:37,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 14:02:37,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:02:36" (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 [2020-10-29 14:02:37,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 14:02:37,103 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 14:02:37,103 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 14:02:37,103 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 14:02:37,104 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 14:02:37,104 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 14:02:37,104 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 14:02:37,104 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 14:02:37,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 14:02:37,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 14:02:37,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 14:02:37,105 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 14:02:37,105 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 14:02:37,105 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 14:02:37,105 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 14:02:37,105 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 14:02:37,106 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 14:02:37,106 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 14:02:37,106 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 14:02:37,106 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 14:02:37,106 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 14:02:37,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 14:02:37,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 14:02:37,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 14:02:37,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 14:02:37,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 14:02:37,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 14:02:38,534 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 14:02:38,534 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 14:02:38,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 02:02:38 BoogieIcfgContainer [2020-10-29 14:02:38,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 14:02:38,539 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 14:02:38,539 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 14:02:38,543 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 14:02:38,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 02:02:35" (1/3) ... [2020-10-29 14:02:38,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147869e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 02:02:38, skipping insertion in model container [2020-10-29 14:02:38,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 02:02:36" (2/3) ... [2020-10-29 14:02:38,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147869e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 02:02:38, skipping insertion in model container [2020-10-29 14:02:38,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 02:02:38" (3/3) ... [2020-10-29 14:02:38,547 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-29 14:02:38,560 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 14:02:38,566 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 14:02:38,587 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 14:02:38,619 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 14:02:38,619 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 14:02:38,619 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 14:02:38,620 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 14:02:38,620 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 14:02:38,620 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 14:02:38,620 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 14:02:38,620 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 14:02:38,647 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states. [2020-10-29 14:02:38,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-29 14:02:38,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:02:38,666 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:02:38,667 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:02:38,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:02:38,674 INFO L82 PathProgramCache]: Analyzing trace with hash -796746938, now seen corresponding path program 1 times [2020-10-29 14:02:38,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:02:38,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427053698] [2020-10-29 14:02:38,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:02:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:02:39,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:39,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:39,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:40,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:40,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:40,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:40,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:40,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:40,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:41,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:42,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:42,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:42,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:44,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:02:44,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-29 14:02:44,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 14:02:44,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-29 14:02:44,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:02:44,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:02:44,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:02:44,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-29 14:02:44,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-29 14:02:44,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-29 14:02:44,850 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 14:02:44,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:02:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:02:44,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:44,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:02:44,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:02:44,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:02:44,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-29 14:02:44,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:02:44,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:02:44,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:02:44,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:02:44,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:02:44,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:02:44,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:02:44,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427053698] [2020-10-29 14:02:44,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:02:44,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:02:44,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452938479] [2020-10-29 14:02:45,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:02:45,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:02:45,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:02:45,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:02:45,024 INFO L87 Difference]: Start difference. First operand 346 states. Second operand 4 states. [2020-10-29 14:02:45,447 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-29 14:02:47,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:02:47,706 INFO L93 Difference]: Finished difference Result 693 states and 1200 transitions. [2020-10-29 14:02:47,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:02:47,710 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 158 [2020-10-29 14:02:47,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:02:47,757 INFO L225 Difference]: With dead ends: 693 [2020-10-29 14:02:47,758 INFO L226 Difference]: Without dead ends: 556 [2020-10-29 14:02:47,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:02:47,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2020-10-29 14:02:47,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 553. [2020-10-29 14:02:47,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 553 states. [2020-10-29 14:02:47,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 826 transitions. [2020-10-29 14:02:47,890 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 826 transitions. Word has length 158 [2020-10-29 14:02:47,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:02:47,893 INFO L481 AbstractCegarLoop]: Abstraction has 553 states and 826 transitions. [2020-10-29 14:02:47,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:02:47,894 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 826 transitions. [2020-10-29 14:02:47,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-29 14:02:47,908 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:02:47,908 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:02:47,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 14:02:47,909 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:02:47,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:02:47,909 INFO L82 PathProgramCache]: Analyzing trace with hash -113561026, now seen corresponding path program 1 times [2020-10-29 14:02:47,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:02:47,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247193410] [2020-10-29 14:02:47,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:02:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:02:48,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:48,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:48,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:48,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:48,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:48,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:48,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:49,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:49,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:50,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:51,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:51,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:51,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:53,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:02:53,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-29 14:02:53,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 14:02:53,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-29 14:02:53,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:02:53,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:02:53,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:02:53,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:02:53,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-29 14:02:53,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:02:53,525 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 14:02:53,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:02:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:02:53,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:53,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:02:53,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:02:53,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:02:53,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 14:02:53,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:02:53,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:02:53,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:02:53,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:02:53,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:02:53,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:02:53,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:02:53,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247193410] [2020-10-29 14:02:53,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:02:53,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:02:53,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817618777] [2020-10-29 14:02:53,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:02:53,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:02:53,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:02:53,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:02:53,658 INFO L87 Difference]: Start difference. First operand 553 states and 826 transitions. Second operand 5 states. [2020-10-29 14:02:55,829 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-29 14:02:56,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:02:56,973 INFO L93 Difference]: Finished difference Result 1595 states and 2375 transitions. [2020-10-29 14:02:56,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:02:56,975 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 158 [2020-10-29 14:02:56,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:02:56,985 INFO L225 Difference]: With dead ends: 1595 [2020-10-29 14:02:56,985 INFO L226 Difference]: Without dead ends: 1059 [2020-10-29 14:02:56,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:02:56,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2020-10-29 14:02:57,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 1056. [2020-10-29 14:02:57,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1056 states. [2020-10-29 14:02:57,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1560 transitions. [2020-10-29 14:02:57,087 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1560 transitions. Word has length 158 [2020-10-29 14:02:57,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:02:57,088 INFO L481 AbstractCegarLoop]: Abstraction has 1056 states and 1560 transitions. [2020-10-29 14:02:57,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:02:57,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1560 transitions. [2020-10-29 14:02:57,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-29 14:02:57,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:02:57,097 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:02:57,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 14:02:57,097 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:02:57,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:02:57,098 INFO L82 PathProgramCache]: Analyzing trace with hash 2090756356, now seen corresponding path program 1 times [2020-10-29 14:02:57,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:02:57,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134468024] [2020-10-29 14:02:57,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:02:57,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:02:57,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:57,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:57,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:57,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:57,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:57,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:57,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:57,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:58,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:58,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:02:59,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:00,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:00,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:01,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:02,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:03:02,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-29 14:03:02,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 14:03:02,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-29 14:03:02,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:03:02,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:03:02,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:03:02,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:03:02,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-29 14:03:02,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:03:02,713 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 14:03:02,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:03:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:03:02,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:02,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:03:02,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:03:02,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:03:02,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 14:03:02,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:03:02,739 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:03:02,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:03:02,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:03:02,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:03:02,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:03:02,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:03:02,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134468024] [2020-10-29 14:03:02,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:03:02,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:03:02,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923916797] [2020-10-29 14:03:02,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:03:02,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:03:02,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:03:02,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:03:02,840 INFO L87 Difference]: Start difference. First operand 1056 states and 1560 transitions. Second operand 5 states. [2020-10-29 14:03:05,602 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-29 14:03:06,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:03:06,902 INFO L93 Difference]: Finished difference Result 2904 states and 4300 transitions. [2020-10-29 14:03:06,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:03:06,903 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 159 [2020-10-29 14:03:06,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:03:06,919 INFO L225 Difference]: With dead ends: 2904 [2020-10-29 14:03:06,919 INFO L226 Difference]: Without dead ends: 2039 [2020-10-29 14:03:06,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:03:06,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2020-10-29 14:03:07,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 2036. [2020-10-29 14:03:07,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2036 states. [2020-10-29 14:03:07,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2036 states to 2036 states and 2976 transitions. [2020-10-29 14:03:07,103 INFO L78 Accepts]: Start accepts. Automaton has 2036 states and 2976 transitions. Word has length 159 [2020-10-29 14:03:07,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:03:07,104 INFO L481 AbstractCegarLoop]: Abstraction has 2036 states and 2976 transitions. [2020-10-29 14:03:07,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:03:07,104 INFO L276 IsEmpty]: Start isEmpty. Operand 2036 states and 2976 transitions. [2020-10-29 14:03:07,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-29 14:03:07,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:03:07,110 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:03:07,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 14:03:07,110 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:03:07,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:03:07,111 INFO L82 PathProgramCache]: Analyzing trace with hash 2020530880, now seen corresponding path program 1 times [2020-10-29 14:03:07,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:03:07,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371102955] [2020-10-29 14:03:07,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:03:07,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:03:07,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:07,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:07,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:07,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:07,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:07,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:07,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:07,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:08,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:12,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:12,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:03:12,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-29 14:03:12,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 14:03:12,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-29 14:03:12,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:03:12,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:03:12,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:03:12,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:03:12,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-29 14:03:12,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 14:03:12,693 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 14:03:12,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:03:12,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:03:12,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:12,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:03:12,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:03:12,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:03:12,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 14:03:12,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:03:12,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:03:12,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:03:12,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:03:12,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:03:12,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:03:12,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:03:12,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371102955] [2020-10-29 14:03:12,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:03:12,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:03:12,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315641776] [2020-10-29 14:03:12,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:03:12,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:03:12,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:03:12,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:03:12,882 INFO L87 Difference]: Start difference. First operand 2036 states and 2976 transitions. Second operand 5 states. [2020-10-29 14:03:15,857 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-29 14:03:17,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:03:17,131 INFO L93 Difference]: Finished difference Result 5891 states and 8573 transitions. [2020-10-29 14:03:17,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:03:17,132 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 160 [2020-10-29 14:03:17,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:03:17,154 INFO L225 Difference]: With dead ends: 5891 [2020-10-29 14:03:17,154 INFO L226 Difference]: Without dead ends: 3928 [2020-10-29 14:03:17,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:03:17,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3928 states. [2020-10-29 14:03:17,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3928 to 3925. [2020-10-29 14:03:17,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3925 states. [2020-10-29 14:03:17,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3925 states to 3925 states and 5665 transitions. [2020-10-29 14:03:17,448 INFO L78 Accepts]: Start accepts. Automaton has 3925 states and 5665 transitions. Word has length 160 [2020-10-29 14:03:17,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:03:17,450 INFO L481 AbstractCegarLoop]: Abstraction has 3925 states and 5665 transitions. [2020-10-29 14:03:17,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:03:17,450 INFO L276 IsEmpty]: Start isEmpty. Operand 3925 states and 5665 transitions. [2020-10-29 14:03:17,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-29 14:03:17,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:03:17,458 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:03:17,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 14:03:17,459 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:03:17,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:03:17,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1167417603, now seen corresponding path program 1 times [2020-10-29 14:03:17,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:03:17,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520922754] [2020-10-29 14:03:17,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:03:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:03:17,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:17,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:17,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:17,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:17,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:17,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:18,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:19,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:19,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:19,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:22,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:22,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:22,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:03:22,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-29 14:03:22,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-29 14:03:22,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 14:03:22,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:03:22,498 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:03:22,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:03:22,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:03:22,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-29 14:03:22,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:03:22,964 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 14:03:22,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:03:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:03:22,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:22,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:03:22,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:03:22,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:03:22,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 14:03:22,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:03:22,986 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:03:22,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:03:22,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:03:22,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:03:22,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:03:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:03:23,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520922754] [2020-10-29 14:03:23,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:03:23,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:03:23,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731092751] [2020-10-29 14:03:23,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:03:23,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:03:23,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:03:23,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:03:23,078 INFO L87 Difference]: Start difference. First operand 3925 states and 5665 transitions. Second operand 5 states. [2020-10-29 14:03:25,755 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-29 14:03:27,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:03:27,116 INFO L93 Difference]: Finished difference Result 11145 states and 16053 transitions. [2020-10-29 14:03:27,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:03:27,117 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 161 [2020-10-29 14:03:27,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:03:27,151 INFO L225 Difference]: With dead ends: 11145 [2020-10-29 14:03:27,151 INFO L226 Difference]: Without dead ends: 7544 [2020-10-29 14:03:27,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:03:27,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7544 states. [2020-10-29 14:03:27,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7544 to 7541. [2020-10-29 14:03:27,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7541 states. [2020-10-29 14:03:27,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7541 states to 7541 states and 10733 transitions. [2020-10-29 14:03:27,760 INFO L78 Accepts]: Start accepts. Automaton has 7541 states and 10733 transitions. Word has length 161 [2020-10-29 14:03:27,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:03:27,761 INFO L481 AbstractCegarLoop]: Abstraction has 7541 states and 10733 transitions. [2020-10-29 14:03:27,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:03:27,761 INFO L276 IsEmpty]: Start isEmpty. Operand 7541 states and 10733 transitions. [2020-10-29 14:03:27,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-29 14:03:27,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:03:27,775 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:03:27,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 14:03:27,775 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:03:27,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:03:27,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1755041566, now seen corresponding path program 1 times [2020-10-29 14:03:27,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:03:27,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491408944] [2020-10-29 14:03:27,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:03:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:03:27,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:27,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:27,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:27,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:27,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:28,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:28,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:31,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:31,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:32,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:03:32,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-29 14:03:32,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 14:03:32,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 14:03:32,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:03:32,801 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:03:32,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:03:32,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:03:32,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-29 14:03:32,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:03:33,283 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 14:03:33,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:03:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:03:33,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:33,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:03:33,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:03:33,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:03:33,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 14:03:33,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:03:33,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:03:33,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:03:33,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:03:33,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:03:33,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:03:33,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:03:33,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491408944] [2020-10-29 14:03:33,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:03:33,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:03:33,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836041456] [2020-10-29 14:03:33,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:03:33,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:03:33,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:03:33,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:03:33,407 INFO L87 Difference]: Start difference. First operand 7541 states and 10733 transitions. Second operand 5 states. [2020-10-29 14:03:36,341 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-29 14:03:37,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:03:37,925 INFO L93 Difference]: Finished difference Result 19437 states and 27645 transitions. [2020-10-29 14:03:37,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:03:37,926 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 162 [2020-10-29 14:03:37,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:03:37,982 INFO L225 Difference]: With dead ends: 19437 [2020-10-29 14:03:37,982 INFO L226 Difference]: Without dead ends: 13114 [2020-10-29 14:03:37,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:03:38,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13114 states. [2020-10-29 14:03:39,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13114 to 13111. [2020-10-29 14:03:39,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13111 states. [2020-10-29 14:03:39,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13111 states to 13111 states and 18305 transitions. [2020-10-29 14:03:39,087 INFO L78 Accepts]: Start accepts. Automaton has 13111 states and 18305 transitions. Word has length 162 [2020-10-29 14:03:39,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:03:39,087 INFO L481 AbstractCegarLoop]: Abstraction has 13111 states and 18305 transitions. [2020-10-29 14:03:39,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:03:39,088 INFO L276 IsEmpty]: Start isEmpty. Operand 13111 states and 18305 transitions. [2020-10-29 14:03:39,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-29 14:03:39,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:03:39,110 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:03:39,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 14:03:39,110 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:03:39,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:03:39,111 INFO L82 PathProgramCache]: Analyzing trace with hash 829504643, now seen corresponding path program 1 times [2020-10-29 14:03:39,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:03:39,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736341333] [2020-10-29 14:03:39,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:03:39,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:03:39,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:39,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:39,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:39,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:39,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:39,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:44,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:03:44,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-29 14:03:44,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 14:03:44,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 14:03:44,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:03:44,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:03:44,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:03:44,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 14:03:44,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-29 14:03:44,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:03:44,576 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 14:03:44,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:03:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:03:44,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:44,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:03:44,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:03:44,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:03:44,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-29 14:03:44,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:03:44,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:03:44,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:03:44,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:03:44,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:03:44,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:03:44,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:03:44,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736341333] [2020-10-29 14:03:44,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:03:44,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:03:44,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093960213] [2020-10-29 14:03:44,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:03:44,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:03:44,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:03:44,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:03:44,700 INFO L87 Difference]: Start difference. First operand 13111 states and 18305 transitions. Second operand 5 states. [2020-10-29 14:03:47,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:03:47,025 INFO L93 Difference]: Finished difference Result 22166 states and 31016 transitions. [2020-10-29 14:03:47,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:03:47,026 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 163 [2020-10-29 14:03:47,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:03:47,047 INFO L225 Difference]: With dead ends: 22166 [2020-10-29 14:03:47,048 INFO L226 Difference]: Without dead ends: 9363 [2020-10-29 14:03:47,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 14:03:47,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9363 states. [2020-10-29 14:03:47,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9363 to 9361. [2020-10-29 14:03:47,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9361 states. [2020-10-29 14:03:47,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9361 states to 9361 states and 13097 transitions. [2020-10-29 14:03:47,776 INFO L78 Accepts]: Start accepts. Automaton has 9361 states and 13097 transitions. Word has length 163 [2020-10-29 14:03:47,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:03:47,776 INFO L481 AbstractCegarLoop]: Abstraction has 9361 states and 13097 transitions. [2020-10-29 14:03:47,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:03:47,776 INFO L276 IsEmpty]: Start isEmpty. Operand 9361 states and 13097 transitions. [2020-10-29 14:03:47,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-29 14:03:47,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:03:47,791 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:03:47,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 14:03:47,792 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:03:47,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:03:47,792 INFO L82 PathProgramCache]: Analyzing trace with hash -287782448, now seen corresponding path program 1 times [2020-10-29 14:03:47,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:03:47,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856164025] [2020-10-29 14:03:47,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:03:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:03:47,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:47,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:47,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:47,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:47,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:48,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:48,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:48,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:48,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:48,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:52,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:03:52,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-29 14:03:52,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 14:03:52,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 14:03:52,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:03:52,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:03:52,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:03:52,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:03:52,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-29 14:03:52,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:03:53,271 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 14:03:53,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:03:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:03:53,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:53,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:03:53,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:03:53,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:03:53,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 14:03:53,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:03:53,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:03:53,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:03:53,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:03:53,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:03:53,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:03:53,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:03:53,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856164025] [2020-10-29 14:03:53,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:03:53,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:03:53,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948887892] [2020-10-29 14:03:53,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:03:53,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:03:53,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:03:53,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:03:53,361 INFO L87 Difference]: Start difference. First operand 9361 states and 13097 transitions. Second operand 5 states. [2020-10-29 14:03:56,247 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-29 14:03:57,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:03:57,870 INFO L93 Difference]: Finished difference Result 26725 states and 37333 transitions. [2020-10-29 14:03:57,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:03:57,871 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 166 [2020-10-29 14:03:57,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:03:57,912 INFO L225 Difference]: With dead ends: 26725 [2020-10-29 14:03:57,912 INFO L226 Difference]: Without dead ends: 18038 [2020-10-29 14:03:57,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:03:57,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18038 states. [2020-10-29 14:03:59,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18038 to 18035. [2020-10-29 14:03:59,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18035 states. [2020-10-29 14:03:59,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18035 states to 18035 states and 24831 transitions. [2020-10-29 14:03:59,215 INFO L78 Accepts]: Start accepts. Automaton has 18035 states and 24831 transitions. Word has length 166 [2020-10-29 14:03:59,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:03:59,215 INFO L481 AbstractCegarLoop]: Abstraction has 18035 states and 24831 transitions. [2020-10-29 14:03:59,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:03:59,216 INFO L276 IsEmpty]: Start isEmpty. Operand 18035 states and 24831 transitions. [2020-10-29 14:03:59,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-29 14:03:59,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:03:59,235 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:03:59,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 14:03:59,236 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:03:59,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:03:59,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1636974158, now seen corresponding path program 1 times [2020-10-29 14:03:59,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:03:59,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978941354] [2020-10-29 14:03:59,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:03:59,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:03:59,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:59,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:59,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:59,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:59,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:03:59,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:04,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:04:04,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-29 14:04:04,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 14:04:04,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-29 14:04:04,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:04:04,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:04:04,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:04:04,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 14:04:04,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 14:04:04,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:04:04,711 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 14:04:04,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:04:04,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:04:04,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:04,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:04:04,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:04:04,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:04:04,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 14:04:04,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:04:04,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:04:04,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:04:04,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:04:04,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:04:04,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:04:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:04:04,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978941354] [2020-10-29 14:04:04,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:04:04,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:04:04,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505460330] [2020-10-29 14:04:04,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:04:04,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:04:04,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:04:04,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:04:04,770 INFO L87 Difference]: Start difference. First operand 18035 states and 24831 transitions. Second operand 5 states. [2020-10-29 14:04:07,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:04:07,291 INFO L93 Difference]: Finished difference Result 32324 states and 44512 transitions. [2020-10-29 14:04:07,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:04:07,292 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 167 [2020-10-29 14:04:07,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:04:07,317 INFO L225 Difference]: With dead ends: 32324 [2020-10-29 14:04:07,318 INFO L226 Difference]: Without dead ends: 14703 [2020-10-29 14:04:07,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 14:04:07,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14703 states. [2020-10-29 14:04:08,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14703 to 14697. [2020-10-29 14:04:08,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14697 states. [2020-10-29 14:04:08,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14697 states to 14697 states and 20202 transitions. [2020-10-29 14:04:08,621 INFO L78 Accepts]: Start accepts. Automaton has 14697 states and 20202 transitions. Word has length 167 [2020-10-29 14:04:08,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:04:08,621 INFO L481 AbstractCegarLoop]: Abstraction has 14697 states and 20202 transitions. [2020-10-29 14:04:08,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:04:08,621 INFO L276 IsEmpty]: Start isEmpty. Operand 14697 states and 20202 transitions. [2020-10-29 14:04:08,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-29 14:04:08,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:04:08,640 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:04:08,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 14:04:08,640 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:04:08,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:04:08,641 INFO L82 PathProgramCache]: Analyzing trace with hash -312944009, now seen corresponding path program 1 times [2020-10-29 14:04:08,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:04:08,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885085692] [2020-10-29 14:04:08,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:04:08,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:04:08,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:08,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:08,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:08,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:08,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:08,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:08,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:08,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:09,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:09,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:09,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:13,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:04:13,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-29 14:04:13,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 14:04:13,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 14:04:13,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:04:13,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:04:13,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:04:13,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:04:13,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-29 14:04:13,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:04:14,234 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 14:04:14,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:04:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:04:14,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:14,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:04:14,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:04:14,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:04:14,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 14:04:14,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:04:14,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:04:14,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:04:14,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:04:14,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:04:14,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:04:14,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:04:14,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885085692] [2020-10-29 14:04:14,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:04:14,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:04:14,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489593626] [2020-10-29 14:04:14,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:04:14,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:04:14,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:04:14,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:04:14,316 INFO L87 Difference]: Start difference. First operand 14697 states and 20202 transitions. Second operand 5 states. [2020-10-29 14:04:14,811 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-29 14:04:18,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:04:18,615 INFO L93 Difference]: Finished difference Result 25457 states and 35033 transitions. [2020-10-29 14:04:18,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 14:04:18,615 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 170 [2020-10-29 14:04:18,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:04:18,634 INFO L225 Difference]: With dead ends: 25457 [2020-10-29 14:04:18,634 INFO L226 Difference]: Without dead ends: 14686 [2020-10-29 14:04:18,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 14:04:18,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14686 states. [2020-10-29 14:04:19,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14686 to 14683. [2020-10-29 14:04:19,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14683 states. [2020-10-29 14:04:19,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14683 states to 14683 states and 20092 transitions. [2020-10-29 14:04:19,663 INFO L78 Accepts]: Start accepts. Automaton has 14683 states and 20092 transitions. Word has length 170 [2020-10-29 14:04:19,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:04:19,664 INFO L481 AbstractCegarLoop]: Abstraction has 14683 states and 20092 transitions. [2020-10-29 14:04:19,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:04:19,664 INFO L276 IsEmpty]: Start isEmpty. Operand 14683 states and 20092 transitions. [2020-10-29 14:04:19,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-29 14:04:19,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:04:19,676 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:04:19,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 14:04:19,676 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:04:19,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:04:19,677 INFO L82 PathProgramCache]: Analyzing trace with hash -223428398, now seen corresponding path program 1 times [2020-10-29 14:04:19,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:04:19,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188413458] [2020-10-29 14:04:19,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:04:19,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:04:19,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:19,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:19,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:19,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:19,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:19,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:19,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:20,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:20,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:20,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:24,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:24,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:04:24,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-29 14:04:24,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 14:04:24,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-29 14:04:24,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:04:24,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:04:24,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:04:24,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 14:04:24,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 14:04:24,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 14:04:25,215 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 14:04:25,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:04:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:04:25,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:25,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:04:25,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:04:25,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:04:25,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 14:04:25,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:04:25,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:04:25,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:04:25,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:04:25,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:04:25,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:04:25,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:04:25,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188413458] [2020-10-29 14:04:25,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:04:25,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:04:25,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457847780] [2020-10-29 14:04:25,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:04:25,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:04:25,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:04:25,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:04:25,299 INFO L87 Difference]: Start difference. First operand 14683 states and 20092 transitions. Second operand 5 states. [2020-10-29 14:04:25,724 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2020-10-29 14:04:29,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:04:29,082 INFO L93 Difference]: Finished difference Result 25458 states and 34825 transitions. [2020-10-29 14:04:29,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 14:04:29,082 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 171 [2020-10-29 14:04:29,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:04:29,098 INFO L225 Difference]: With dead ends: 25458 [2020-10-29 14:04:29,099 INFO L226 Difference]: Without dead ends: 14682 [2020-10-29 14:04:29,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-29 14:04:29,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14682 states. [2020-10-29 14:04:30,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14682 to 14679. [2020-10-29 14:04:30,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14679 states. [2020-10-29 14:04:30,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14679 states to 14679 states and 19972 transitions. [2020-10-29 14:04:30,251 INFO L78 Accepts]: Start accepts. Automaton has 14679 states and 19972 transitions. Word has length 171 [2020-10-29 14:04:30,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:04:30,251 INFO L481 AbstractCegarLoop]: Abstraction has 14679 states and 19972 transitions. [2020-10-29 14:04:30,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:04:30,251 INFO L276 IsEmpty]: Start isEmpty. Operand 14679 states and 19972 transitions. [2020-10-29 14:04:30,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-29 14:04:30,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:04:30,265 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:04:30,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 14:04:30,265 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:04:30,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:04:30,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1375220728, now seen corresponding path program 1 times [2020-10-29 14:04:30,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:04:30,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506948467] [2020-10-29 14:04:30,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:04:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:04:30,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:30,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:30,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:30,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:30,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:30,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:30,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:35,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:04:35,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-29 14:04:35,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 14:04:35,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 14:04:35,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:04:35,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:04:35,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 14:04:35,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 14:04:35,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-29 14:04:35,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:04:35,764 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 14:04:35,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:04:35,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:04:35,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:35,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:04:35,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:04:35,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:04:35,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 14:04:35,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:04:35,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:04:35,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:04:35,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:04:35,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 14:04:35,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:04:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:04:35,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506948467] [2020-10-29 14:04:35,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:04:35,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 14:04:35,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693714756] [2020-10-29 14:04:35,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 14:04:35,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:04:35,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 14:04:35,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 14:04:35,846 INFO L87 Difference]: Start difference. First operand 14679 states and 19972 transitions. Second operand 9 states. [2020-10-29 14:04:36,298 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-29 14:04:39,369 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-29 14:04:39,831 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-10-29 14:04:41,999 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-10-29 14:04:42,468 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-29 14:04:43,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:04:43,164 INFO L93 Difference]: Finished difference Result 43215 states and 59892 transitions. [2020-10-29 14:04:43,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 14:04:43,164 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 172 [2020-10-29 14:04:43,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:04:43,200 INFO L225 Difference]: With dead ends: 43215 [2020-10-29 14:04:43,200 INFO L226 Difference]: Without dead ends: 30356 [2020-10-29 14:04:43,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2020-10-29 14:04:43,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30356 states. [2020-10-29 14:04:44,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30356 to 17983. [2020-10-29 14:04:44,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17983 states. [2020-10-29 14:04:44,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17983 states to 17983 states and 24104 transitions. [2020-10-29 14:04:44,929 INFO L78 Accepts]: Start accepts. Automaton has 17983 states and 24104 transitions. Word has length 172 [2020-10-29 14:04:44,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:04:44,929 INFO L481 AbstractCegarLoop]: Abstraction has 17983 states and 24104 transitions. [2020-10-29 14:04:44,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 14:04:44,929 INFO L276 IsEmpty]: Start isEmpty. Operand 17983 states and 24104 transitions. [2020-10-29 14:04:44,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-29 14:04:44,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:04:44,939 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:04:44,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 14:04:44,939 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:04:44,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:04:44,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1482241510, now seen corresponding path program 1 times [2020-10-29 14:04:44,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:04:44,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483689700] [2020-10-29 14:04:44,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:04:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:04:45,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:45,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:45,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:45,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:45,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:49,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:04:49,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-29 14:04:49,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 14:04:49,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-29 14:04:49,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:04:49,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:04:49,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:04:49,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-29 14:04:49,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-29 14:04:49,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:04:50,396 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 14:04:50,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:04:50,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:04:50,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:50,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:04:50,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:04:50,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:04:50,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 14:04:50,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:04:50,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:04:50,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:04:50,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:04:50,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:04:50,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:04:50,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:04:50,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483689700] [2020-10-29 14:04:50,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:04:50,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 14:04:50,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988333432] [2020-10-29 14:04:50,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 14:04:50,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:04:50,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 14:04:50,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 14:04:50,455 INFO L87 Difference]: Start difference. First operand 17983 states and 24104 transitions. Second operand 4 states. [2020-10-29 14:04:54,230 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-29 14:04:55,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:04:55,157 INFO L93 Difference]: Finished difference Result 38357 states and 52748 transitions. [2020-10-29 14:04:55,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:04:55,158 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 172 [2020-10-29 14:04:55,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:04:55,182 INFO L225 Difference]: With dead ends: 38357 [2020-10-29 14:04:55,182 INFO L226 Difference]: Without dead ends: 22886 [2020-10-29 14:04:55,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:04:55,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22886 states. [2020-10-29 14:04:57,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22886 to 21407. [2020-10-29 14:04:57,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21407 states. [2020-10-29 14:04:57,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21407 states to 21407 states and 29536 transitions. [2020-10-29 14:04:57,278 INFO L78 Accepts]: Start accepts. Automaton has 21407 states and 29536 transitions. Word has length 172 [2020-10-29 14:04:57,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:04:57,278 INFO L481 AbstractCegarLoop]: Abstraction has 21407 states and 29536 transitions. [2020-10-29 14:04:57,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 14:04:57,278 INFO L276 IsEmpty]: Start isEmpty. Operand 21407 states and 29536 transitions. [2020-10-29 14:04:57,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-29 14:04:57,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:04:57,287 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:04:57,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 14:04:57,287 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:04:57,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:04:57,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1822710504, now seen corresponding path program 1 times [2020-10-29 14:04:57,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:04:57,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38931925] [2020-10-29 14:04:57,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:04:57,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:04:57,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:57,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:57,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:57,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:04:57,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:02,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:05:02,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-29 14:05:02,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 14:05:02,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-29 14:05:02,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:05:02,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:05:02,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 14:05:02,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 14:05:02,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-29 14:05:02,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:05:02,775 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 14:05:02,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:05:02,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:05:02,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:02,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:05:02,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:05:02,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:05:02,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 14:05:02,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:05:02,789 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:05:02,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 14:05:02,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:05:02,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 14:05:02,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:05:02,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:05:02,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38931925] [2020-10-29 14:05:02,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:05:02,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:05:02,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093659444] [2020-10-29 14:05:02,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 14:05:02,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:05:02,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 14:05:02,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 14:05:02,828 INFO L87 Difference]: Start difference. First operand 21407 states and 29536 transitions. Second operand 5 states. [2020-10-29 14:05:06,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:05:06,046 INFO L93 Difference]: Finished difference Result 32896 states and 45634 transitions. [2020-10-29 14:05:06,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 14:05:06,046 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 175 [2020-10-29 14:05:06,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:05:06,062 INFO L225 Difference]: With dead ends: 32896 [2020-10-29 14:05:06,062 INFO L226 Difference]: Without dead ends: 17624 [2020-10-29 14:05:06,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 14:05:06,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17624 states. [2020-10-29 14:05:07,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17624 to 17620. [2020-10-29 14:05:07,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17620 states. [2020-10-29 14:05:07,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17620 states to 17620 states and 24270 transitions. [2020-10-29 14:05:07,697 INFO L78 Accepts]: Start accepts. Automaton has 17620 states and 24270 transitions. Word has length 175 [2020-10-29 14:05:07,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:05:07,697 INFO L481 AbstractCegarLoop]: Abstraction has 17620 states and 24270 transitions. [2020-10-29 14:05:07,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 14:05:07,698 INFO L276 IsEmpty]: Start isEmpty. Operand 17620 states and 24270 transitions. [2020-10-29 14:05:07,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-29 14:05:07,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:05:07,705 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:05:07,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 14:05:07,706 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:05:07,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:05:07,706 INFO L82 PathProgramCache]: Analyzing trace with hash -286308304, now seen corresponding path program 1 times [2020-10-29 14:05:07,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:05:07,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527187416] [2020-10-29 14:05:07,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:05:07,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:05:07,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:07,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:07,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:07,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:07,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:08,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:12,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:05:12,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-29 14:05:12,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 14:05:12,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-29 14:05:12,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:05:12,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:05:12,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 14:05:12,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 14:05:12,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-29 14:05:12,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:05:13,177 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 14:05:13,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:05:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:05:13,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:13,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:05:13,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:05:13,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:05:13,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 14:05:13,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:05:13,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:05:13,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:05:13,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:05:13,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 14:05:13,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:05:13,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:05:13,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527187416] [2020-10-29 14:05:13,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:05:13,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 14:05:13,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158029000] [2020-10-29 14:05:13,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 14:05:13,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:05:13,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 14:05:13,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 14:05:13,256 INFO L87 Difference]: Start difference. First operand 17620 states and 24270 transitions. Second operand 6 states. [2020-10-29 14:05:13,717 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-29 14:05:17,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:05:17,086 INFO L93 Difference]: Finished difference Result 33327 states and 46320 transitions. [2020-10-29 14:05:17,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 14:05:17,087 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 175 [2020-10-29 14:05:17,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:05:17,103 INFO L225 Difference]: With dead ends: 33327 [2020-10-29 14:05:17,104 INFO L226 Difference]: Without dead ends: 17540 [2020-10-29 14:05:17,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-29 14:05:17,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17540 states. [2020-10-29 14:05:18,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17540 to 17540. [2020-10-29 14:05:18,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17540 states. [2020-10-29 14:05:18,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17540 states to 17540 states and 24010 transitions. [2020-10-29 14:05:18,754 INFO L78 Accepts]: Start accepts. Automaton has 17540 states and 24010 transitions. Word has length 175 [2020-10-29 14:05:18,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:05:18,755 INFO L481 AbstractCegarLoop]: Abstraction has 17540 states and 24010 transitions. [2020-10-29 14:05:18,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 14:05:18,755 INFO L276 IsEmpty]: Start isEmpty. Operand 17540 states and 24010 transitions. [2020-10-29 14:05:18,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-29 14:05:18,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:05:18,763 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:05:18,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 14:05:18,764 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:05:18,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:05:18,764 INFO L82 PathProgramCache]: Analyzing trace with hash 2074593461, now seen corresponding path program 1 times [2020-10-29 14:05:18,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:05:18,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42971228] [2020-10-29 14:05:18,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:05:18,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:05:18,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:18,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:18,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:18,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:19,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:19,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:23,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:05:23,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-29 14:05:23,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 14:05:23,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 14:05:23,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:05:23,810 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:05:23,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 14:05:23,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 14:05:23,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 151 [2020-10-29 14:05:23,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:05:24,357 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 14:05:24,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:05:24,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:05:24,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:24,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:05:24,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:05:24,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:05:24,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-29 14:05:24,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:05:24,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:05:24,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:05:24,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:05:24,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 14:05:24,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:05:24,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:05:24,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42971228] [2020-10-29 14:05:24,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:05:24,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 14:05:24,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776083831] [2020-10-29 14:05:24,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 14:05:24,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:05:24,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 14:05:24,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-29 14:05:24,439 INFO L87 Difference]: Start difference. First operand 17540 states and 24010 transitions. Second operand 10 states. [2020-10-29 14:05:24,929 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-29 14:05:28,482 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 225 [2020-10-29 14:05:28,921 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-10-29 14:05:29,436 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-29 14:05:33,149 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-29 14:05:35,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:05:35,627 INFO L93 Difference]: Finished difference Result 65259 states and 93327 transitions. [2020-10-29 14:05:35,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 14:05:35,627 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 175 [2020-10-29 14:05:35,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:05:35,689 INFO L225 Difference]: With dead ends: 65259 [2020-10-29 14:05:35,689 INFO L226 Difference]: Without dead ends: 50421 [2020-10-29 14:05:35,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2020-10-29 14:05:35,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50421 states. [2020-10-29 14:05:39,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50421 to 28171. [2020-10-29 14:05:39,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28171 states. [2020-10-29 14:05:39,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28171 states to 28171 states and 39567 transitions. [2020-10-29 14:05:39,265 INFO L78 Accepts]: Start accepts. Automaton has 28171 states and 39567 transitions. Word has length 175 [2020-10-29 14:05:39,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:05:39,265 INFO L481 AbstractCegarLoop]: Abstraction has 28171 states and 39567 transitions. [2020-10-29 14:05:39,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 14:05:39,265 INFO L276 IsEmpty]: Start isEmpty. Operand 28171 states and 39567 transitions. [2020-10-29 14:05:39,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-29 14:05:39,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:05:39,280 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:05:39,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 14:05:39,280 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:05:39,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:05:39,281 INFO L82 PathProgramCache]: Analyzing trace with hash 869924882, now seen corresponding path program 1 times [2020-10-29 14:05:39,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:05:39,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788948639] [2020-10-29 14:05:39,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:05:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:05:39,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:39,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:39,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:39,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:42,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:42,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:42,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:43,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:44,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:05:44,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-29 14:05:44,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 14:05:44,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 14:05:44,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:05:44,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:05:44,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 14:05:44,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 14:05:44,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 166 [2020-10-29 14:05:44,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:05:44,854 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 14:05:44,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 14:05:44,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:05:44,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:05:44,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 14:05:44,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 14:05:44,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 14:05:44,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-29 14:05:44,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 14:05:44,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 14:05:44,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 14:05:44,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 14:05:44,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 14:05:44,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 14:05:44,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 14:05:44,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788948639] [2020-10-29 14:05:44,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 14:05:44,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 14:05:44,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118712292] [2020-10-29 14:05:44,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 14:05:44,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 14:05:44,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 14:05:44,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 14:05:44,979 INFO L87 Difference]: Start difference. First operand 28171 states and 39567 transitions. Second operand 9 states. [2020-10-29 14:05:45,453 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-10-29 14:05:49,526 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 223 [2020-10-29 14:05:50,056 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-10-29 14:05:53,565 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification that was a NOOP. DAG size: 221 [2020-10-29 14:05:54,426 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2020-10-29 14:06:01,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 14:06:01,094 INFO L93 Difference]: Finished difference Result 110435 states and 156707 transitions. [2020-10-29 14:06:01,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 14:06:01,095 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 175 [2020-10-29 14:06:01,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 14:06:01,205 INFO L225 Difference]: With dead ends: 110435 [2020-10-29 14:06:01,205 INFO L226 Difference]: Without dead ends: 89684 [2020-10-29 14:06:01,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2020-10-29 14:06:01,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89684 states. [2020-10-29 14:06:07,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89684 to 47291. [2020-10-29 14:06:07,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47291 states. [2020-10-29 14:06:07,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47291 states to 47291 states and 66503 transitions. [2020-10-29 14:06:07,904 INFO L78 Accepts]: Start accepts. Automaton has 47291 states and 66503 transitions. Word has length 175 [2020-10-29 14:06:07,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 14:06:07,905 INFO L481 AbstractCegarLoop]: Abstraction has 47291 states and 66503 transitions. [2020-10-29 14:06:07,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 14:06:07,905 INFO L276 IsEmpty]: Start isEmpty. Operand 47291 states and 66503 transitions. [2020-10-29 14:06:07,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-29 14:06:07,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 14:06:07,917 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 14:06:07,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 14:06:07,918 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 14:06:07,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 14:06:07,918 INFO L82 PathProgramCache]: Analyzing trace with hash -2012706551, now seen corresponding path program 1 times [2020-10-29 14:06:07,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 14:06:07,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144928295] [2020-10-29 14:06:07,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 14:06:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 14:06:07,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:07,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:08,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 14:06:08,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking...