/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:23:49,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:23:49,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:23:49,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:23:49,114 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:23:49,120 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:23:49,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:23:49,127 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:23:49,130 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:23:49,136 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:23:49,137 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:23:49,139 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:23:49,139 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:23:49,142 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:23:49,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:23:49,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:23:49,146 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:23:49,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:23:49,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:23:49,158 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:23:49,181 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:23:49,182 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:23:49,192 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:23:49,195 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:23:49,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:23:49,204 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:23:49,204 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:23:49,205 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:23:49,205 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:23:49,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:23:49,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:23:49,211 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:23:49,213 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:23:49,214 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:23:49,215 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:23:49,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:23:49,215 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:23:49,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:23:49,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:23:49,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:23:49,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:23:49,225 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 05:23:49,270 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:23:49,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:23:49,274 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:23:49,274 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:23:49,274 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:23:49,274 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:23:49,275 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:23:49,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:23:49,275 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:23:49,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:23:49,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:23:49,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:23:49,276 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:23:49,277 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:23:49,277 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:23:49,277 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:23:49,277 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:23:49,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:23:49,278 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:23:49,278 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:23:49,278 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:23:49,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:23:49,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:23:49,279 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:23:49,279 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:23:49,279 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:23:49,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:23:49,279 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:23:49,279 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:23:49,280 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:23:49,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:23:49,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:23:49,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:23:49,734 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:23:49,735 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:23:49,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:23:49,823 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f673e1455/c4ae35e8035348a3b7d4e24be126ff82/FLAGb8807368c [2020-10-27 05:23:50,542 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:23:50,543 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:23:50,554 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f673e1455/c4ae35e8035348a3b7d4e24be126ff82/FLAGb8807368c [2020-10-27 05:23:50,823 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f673e1455/c4ae35e8035348a3b7d4e24be126ff82 [2020-10-27 05:23:50,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:23:50,832 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:23:50,836 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:23:50,836 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:23:50,840 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:23:50,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:23:50" (1/1) ... [2020-10-27 05:23:50,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2233ba8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:23:50, skipping insertion in model container [2020-10-27 05:23:50,846 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:23:50" (1/1) ... [2020-10-27 05:23:50,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:23:50,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:23:51,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:23:51,193 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:23:51,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:23:51,376 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:23:51,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:23:51 WrapperNode [2020-10-27 05:23:51,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:23:51,378 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:23:51,378 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:23:51,378 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:23:51,393 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:23:51" (1/1) ... [2020-10-27 05:23:51,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:23:51" (1/1) ... [2020-10-27 05:23:51,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:23:51" (1/1) ... [2020-10-27 05:23:51,407 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:23:51" (1/1) ... [2020-10-27 05:23:51,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:23:51" (1/1) ... [2020-10-27 05:23:51,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:23:51" (1/1) ... [2020-10-27 05:23:51,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:23:51" (1/1) ... [2020-10-27 05:23:51,459 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:23:51,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:23:51,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:23:51,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:23:51,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:23:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:23:51,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:23:51,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:23:51,565 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:23:51,566 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:23:51,567 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:23:51,567 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:23:51,567 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:23:51,567 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:23:51,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:23:51,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:23:51,568 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:23:51,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:23:51,569 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:23:51,569 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:23:51,569 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:23:51,570 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:23:51,570 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:23:51,570 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:23:51,570 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:23:51,571 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:23:51,571 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 05:23:51,571 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-27 05:23:51,571 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:23:51,571 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:23:51,571 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:23:51,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:23:51,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:23:51,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:23:51,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:23:51,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:23:51,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:23:52,745 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:23:52,746 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:23:52,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:23:52 BoogieIcfgContainer [2020-10-27 05:23:52,748 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:23:52,750 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:23:52,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:23:52,753 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:23:52,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:23:50" (1/3) ... [2020-10-27 05:23:52,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@702270cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:23:52, skipping insertion in model container [2020-10-27 05:23:52,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:23:51" (2/3) ... [2020-10-27 05:23:52,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@702270cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:23:52, skipping insertion in model container [2020-10-27 05:23:52,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:23:52" (3/3) ... [2020-10-27 05:23:52,757 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:23:52,769 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:23:52,774 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:23:52,788 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:23:52,816 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:23:52,816 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:23:52,816 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:23:52,816 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:23:52,816 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:23:52,816 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:23:52,817 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:23:52,817 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:23:52,838 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states. [2020-10-27 05:23:52,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 05:23:52,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:23:52,849 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] [2020-10-27 05:23:52,849 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:23:52,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:23:52,856 INFO L82 PathProgramCache]: Analyzing trace with hash 2080328782, now seen corresponding path program 1 times [2020-10-27 05:23:52,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:23:52,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235967883] [2020-10-27 05:23:52,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:23:53,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:23:53,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:53,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:53,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:53,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:54,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:55,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:58,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:23:58,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 05:23:58,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:23:58,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 05:23:58,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:23:58,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:23:58,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:23:58,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 05:23:58,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:23:58,791 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:23:58,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:23:58,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:23:58,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:23:58,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:23:58,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:23:58,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:23:58,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:23:58,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:23:58,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:23:58,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:23:58,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:23:58,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:23:58,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:23:58,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235967883] [2020-10-27 05:23:58,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:23:58,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:23:58,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675407658] [2020-10-27 05:23:58,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:23:58,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:23:58,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:23:58,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:23:58,890 INFO L87 Difference]: Start difference. First operand 127 states. Second operand 9 states. [2020-10-27 05:23:59,364 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 05:24:00,787 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:24:01,168 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 05:24:01,551 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 05:24:01,909 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:24:02,243 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 05:24:02,592 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:24:02,995 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 05:24:03,333 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 05:24:03,633 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:24:03,937 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:24:04,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:24:04,110 INFO L93 Difference]: Finished difference Result 1031 states and 1635 transitions. [2020-10-27 05:24:04,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 05:24:04,112 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 78 [2020-10-27 05:24:04,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:24:04,163 INFO L225 Difference]: With dead ends: 1031 [2020-10-27 05:24:04,163 INFO L226 Difference]: Without dead ends: 923 [2020-10-27 05:24:04,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2020-10-27 05:24:04,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2020-10-27 05:24:04,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 190. [2020-10-27 05:24:04,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-27 05:24:04,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 273 transitions. [2020-10-27 05:24:04,282 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 273 transitions. Word has length 78 [2020-10-27 05:24:04,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:24:04,283 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 273 transitions. [2020-10-27 05:24:04,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:24:04,285 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 273 transitions. [2020-10-27 05:24:04,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 05:24:04,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:24:04,294 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] [2020-10-27 05:24:04,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:24:04,295 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:24:04,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:24:04,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1787172879, now seen corresponding path program 1 times [2020-10-27 05:24:04,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:24:04,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317242533] [2020-10-27 05:24:04,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:24:04,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:24:04,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:04,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:04,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:04,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:04,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:05,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:05,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:09,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:24:09,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 05:24:09,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:24:09,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:24:09,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:24:09,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:24:09,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:24:09,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 05:24:09,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:24:09,825 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:24:09,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:24:09,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:24:09,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:09,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:24:09,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:24:09,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:24:09,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 05:24:09,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:24:09,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:24:09,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:24:09,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:24:09,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:24:09,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:24:09,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317242533] [2020-10-27 05:24:09,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:24:09,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:24:09,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124634443] [2020-10-27 05:24:09,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:24:09,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:24:09,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:24:09,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:24:09,916 INFO L87 Difference]: Start difference. First operand 190 states and 273 transitions. Second operand 7 states. [2020-10-27 05:24:10,214 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:24:11,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:24:11,041 INFO L93 Difference]: Finished difference Result 567 states and 868 transitions. [2020-10-27 05:24:11,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:24:11,042 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 80 [2020-10-27 05:24:11,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:24:11,046 INFO L225 Difference]: With dead ends: 567 [2020-10-27 05:24:11,046 INFO L226 Difference]: Without dead ends: 424 [2020-10-27 05:24:11,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:24:11,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-10-27 05:24:11,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 229. [2020-10-27 05:24:11,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-27 05:24:11,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 333 transitions. [2020-10-27 05:24:11,079 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 333 transitions. Word has length 80 [2020-10-27 05:24:11,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:24:11,079 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 333 transitions. [2020-10-27 05:24:11,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:24:11,080 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 333 transitions. [2020-10-27 05:24:11,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 05:24:11,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:24:11,082 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] [2020-10-27 05:24:11,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:24:11,082 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:24:11,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:24:11,085 INFO L82 PathProgramCache]: Analyzing trace with hash 340226173, now seen corresponding path program 1 times [2020-10-27 05:24:11,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:24:11,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927910674] [2020-10-27 05:24:11,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:24:11,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:24:11,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:11,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:11,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:11,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:11,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:11,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:11,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:14,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:16,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:24:16,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 05:24:16,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:24:16,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 05:24:16,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:24:16,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:24:16,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:24:16,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 05:24:16,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:24:16,553 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:24:16,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:24:16,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:24:16,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:16,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:24:16,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:24:16,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:24:16,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 05:24:16,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:24:16,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:24:16,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:24:16,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:24:16,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:24:16,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:24:16,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927910674] [2020-10-27 05:24:16,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:24:16,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:24:16,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937182055] [2020-10-27 05:24:16,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:24:16,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:24:16,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:24:16,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:24:16,643 INFO L87 Difference]: Start difference. First operand 229 states and 333 transitions. Second operand 7 states. [2020-10-27 05:24:16,970 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:24:17,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:24:17,869 INFO L93 Difference]: Finished difference Result 563 states and 858 transitions. [2020-10-27 05:24:17,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:24:17,870 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 80 [2020-10-27 05:24:17,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:24:17,876 INFO L225 Difference]: With dead ends: 563 [2020-10-27 05:24:17,876 INFO L226 Difference]: Without dead ends: 420 [2020-10-27 05:24:17,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:24:17,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2020-10-27 05:24:17,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 285. [2020-10-27 05:24:17,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-10-27 05:24:17,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 419 transitions. [2020-10-27 05:24:17,921 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 419 transitions. Word has length 80 [2020-10-27 05:24:17,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:24:17,925 INFO L481 AbstractCegarLoop]: Abstraction has 285 states and 419 transitions. [2020-10-27 05:24:17,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:24:17,925 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 419 transitions. [2020-10-27 05:24:17,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 05:24:17,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:24:17,935 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] [2020-10-27 05:24:17,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:24:17,936 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:24:17,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:24:17,936 INFO L82 PathProgramCache]: Analyzing trace with hash 110313555, now seen corresponding path program 1 times [2020-10-27 05:24:17,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:24:17,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900019487] [2020-10-27 05:24:17,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:24:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:24:17,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:18,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:18,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:18,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:18,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:19,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:19,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:19,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:22,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:24:22,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 05:24:22,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:24:22,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4335 [2020-10-27 05:24:22,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:24:22,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:24:22,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:24:22,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 05:24:22,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:24:22,696 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:24:22,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:24:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:24:22,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:22,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:24:22,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:24:22,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:24:22,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:24:22,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:24:22,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:24:22,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:24:22,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:24:22,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:24:22,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:24:22,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900019487] [2020-10-27 05:24:22,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:24:22,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:24:22,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661564548] [2020-10-27 05:24:22,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:24:22,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:24:22,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:24:22,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:24:22,773 INFO L87 Difference]: Start difference. First operand 285 states and 419 transitions. Second operand 4 states. [2020-10-27 05:24:23,127 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:24:23,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:24:23,646 INFO L93 Difference]: Finished difference Result 721 states and 1098 transitions. [2020-10-27 05:24:23,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:24:23,647 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-27 05:24:23,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:24:23,651 INFO L225 Difference]: With dead ends: 721 [2020-10-27 05:24:23,651 INFO L226 Difference]: Without dead ends: 490 [2020-10-27 05:24:23,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:24:23,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-10-27 05:24:23,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 485. [2020-10-27 05:24:23,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 485 states. [2020-10-27 05:24:23,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 727 transitions. [2020-10-27 05:24:23,705 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 727 transitions. Word has length 80 [2020-10-27 05:24:23,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:24:23,706 INFO L481 AbstractCegarLoop]: Abstraction has 485 states and 727 transitions. [2020-10-27 05:24:23,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:24:23,706 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 727 transitions. [2020-10-27 05:24:23,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 05:24:23,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:24:23,707 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] [2020-10-27 05:24:23,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:24:23,708 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:24:23,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:24:23,708 INFO L82 PathProgramCache]: Analyzing trace with hash 731843188, now seen corresponding path program 1 times [2020-10-27 05:24:23,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:24:23,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292156066] [2020-10-27 05:24:23,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:24:23,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:24:23,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:23,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:23,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:23,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:24,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:24,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:28,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:24:28,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 05:24:28,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:24:28,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4729 [2020-10-27 05:24:28,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:24:28,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:24:28,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 05:24:28,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 05:24:28,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:24:28,896 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:24:28,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:24:28,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:24:28,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:28,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:24:28,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:24:28,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:24:28,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 05:24:28,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:24:28,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:24:28,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:24:28,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:24:28,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:24:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:24:28,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292156066] [2020-10-27 05:24:28,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:24:28,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:24:28,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325205704] [2020-10-27 05:24:28,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:24:28,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:24:28,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:24:28,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:24:28,968 INFO L87 Difference]: Start difference. First operand 485 states and 727 transitions. Second operand 9 states. [2020-10-27 05:24:29,428 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:24:30,519 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 05:24:30,853 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 05:24:31,155 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:24:31,618 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:24:31,985 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 05:24:32,314 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:24:32,627 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:24:33,198 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:24:33,610 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-10-27 05:24:33,968 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 05:24:34,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:24:34,017 INFO L93 Difference]: Finished difference Result 2064 states and 3185 transitions. [2020-10-27 05:24:34,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 05:24:34,020 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 80 [2020-10-27 05:24:34,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:24:34,030 INFO L225 Difference]: With dead ends: 2064 [2020-10-27 05:24:34,030 INFO L226 Difference]: Without dead ends: 1794 [2020-10-27 05:24:34,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812 [2020-10-27 05:24:34,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1794 states. [2020-10-27 05:24:34,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1794 to 485. [2020-10-27 05:24:34,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 485 states. [2020-10-27 05:24:34,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 725 transitions. [2020-10-27 05:24:34,103 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 725 transitions. Word has length 80 [2020-10-27 05:24:34,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:24:34,104 INFO L481 AbstractCegarLoop]: Abstraction has 485 states and 725 transitions. [2020-10-27 05:24:34,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:24:34,104 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 725 transitions. [2020-10-27 05:24:34,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 05:24:34,105 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:24:34,106 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] [2020-10-27 05:24:34,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:24:34,106 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:24:34,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:24:34,107 INFO L82 PathProgramCache]: Analyzing trace with hash -395875709, now seen corresponding path program 1 times [2020-10-27 05:24:34,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:24:34,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720279344] [2020-10-27 05:24:34,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:24:34,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:24:34,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:34,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:34,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:34,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:34,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:34,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:34,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:36,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:39,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:24:39,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 05:24:39,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:24:39,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:24:39,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:24:39,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:24:39,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:24:39,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 05:24:39,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:24:39,531 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:24:39,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:24:39,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:24:39,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:39,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:24:39,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:24:39,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:24:39,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 05:24:39,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:24:39,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:24:39,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:24:39,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:24:39,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:24:39,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:24:39,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720279344] [2020-10-27 05:24:39,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:24:39,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:24:39,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077951203] [2020-10-27 05:24:39,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:24:39,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:24:39,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:24:39,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:24:39,613 INFO L87 Difference]: Start difference. First operand 485 states and 725 transitions. Second operand 7 states. [2020-10-27 05:24:39,933 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:24:40,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:24:40,915 INFO L93 Difference]: Finished difference Result 1051 states and 1600 transitions. [2020-10-27 05:24:40,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:24:40,916 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 80 [2020-10-27 05:24:40,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:24:40,925 INFO L225 Difference]: With dead ends: 1051 [2020-10-27 05:24:40,925 INFO L226 Difference]: Without dead ends: 757 [2020-10-27 05:24:40,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:24:40,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2020-10-27 05:24:41,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 477. [2020-10-27 05:24:41,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2020-10-27 05:24:41,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 705 transitions. [2020-10-27 05:24:41,016 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 705 transitions. Word has length 80 [2020-10-27 05:24:41,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:24:41,016 INFO L481 AbstractCegarLoop]: Abstraction has 477 states and 705 transitions. [2020-10-27 05:24:41,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:24:41,017 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 705 transitions. [2020-10-27 05:24:41,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 05:24:41,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:24:41,018 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] [2020-10-27 05:24:41,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:24:41,018 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:24:41,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:24:41,019 INFO L82 PathProgramCache]: Analyzing trace with hash 940723465, now seen corresponding path program 1 times [2020-10-27 05:24:41,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:24:41,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277232583] [2020-10-27 05:24:41,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:24:41,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:24:41,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:41,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:41,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:41,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:41,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:41,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:41,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:43,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:46,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:24:46,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 05:24:46,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:24:46,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 05:24:46,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:24:46,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:24:46,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:24:46,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 05:24:46,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:24:46,456 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:24:46,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:24:46,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:24:46,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:46,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:24:46,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:24:46,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:24:46,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 05:24:46,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:24:46,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:24:46,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:24:46,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:24:46,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:24:46,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:24:46,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277232583] [2020-10-27 05:24:46,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:24:46,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:24:46,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092594967] [2020-10-27 05:24:46,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:24:46,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:24:46,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:24:46,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:24:46,521 INFO L87 Difference]: Start difference. First operand 477 states and 705 transitions. Second operand 7 states. [2020-10-27 05:24:46,853 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:24:47,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:24:47,758 INFO L93 Difference]: Finished difference Result 1115 states and 1688 transitions. [2020-10-27 05:24:47,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:24:47,759 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 80 [2020-10-27 05:24:47,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:24:47,763 INFO L225 Difference]: With dead ends: 1115 [2020-10-27 05:24:47,764 INFO L226 Difference]: Without dead ends: 789 [2020-10-27 05:24:47,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:24:47,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2020-10-27 05:24:47,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 469. [2020-10-27 05:24:47,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-10-27 05:24:47,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 685 transitions. [2020-10-27 05:24:47,838 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 685 transitions. Word has length 80 [2020-10-27 05:24:47,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:24:47,839 INFO L481 AbstractCegarLoop]: Abstraction has 469 states and 685 transitions. [2020-10-27 05:24:47,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:24:47,839 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 685 transitions. [2020-10-27 05:24:47,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 05:24:47,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:24:47,841 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] [2020-10-27 05:24:47,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:24:47,841 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:24:47,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:24:47,842 INFO L82 PathProgramCache]: Analyzing trace with hash 987810709, now seen corresponding path program 1 times [2020-10-27 05:24:47,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:24:47,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271794834] [2020-10-27 05:24:47,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:24:47,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:24:47,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:47,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:47,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:47,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:47,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:48,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:48,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:49,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:52,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:24:52,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 05:24:52,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:24:52,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:24:52,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:24:52,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:24:52,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:24:52,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 05:24:52,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:24:53,213 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:24:53,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:24:53,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:24:53,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:53,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:24:53,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:24:53,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:24:53,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:24:53,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:24:53,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:24:53,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:24:53,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:24:53,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:24:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:24:53,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271794834] [2020-10-27 05:24:53,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:24:53,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:24:53,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692437653] [2020-10-27 05:24:53,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:24:53,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:24:53,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:24:53,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:24:53,270 INFO L87 Difference]: Start difference. First operand 469 states and 685 transitions. Second operand 7 states. [2020-10-27 05:24:53,598 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 05:24:54,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:24:54,463 INFO L93 Difference]: Finished difference Result 1077 states and 1631 transitions. [2020-10-27 05:24:54,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:24:54,464 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 80 [2020-10-27 05:24:54,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:24:54,469 INFO L225 Difference]: With dead ends: 1077 [2020-10-27 05:24:54,469 INFO L226 Difference]: Without dead ends: 751 [2020-10-27 05:24:54,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:24:54,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2020-10-27 05:24:54,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 441. [2020-10-27 05:24:54,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-10-27 05:24:54,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 644 transitions. [2020-10-27 05:24:54,541 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 644 transitions. Word has length 80 [2020-10-27 05:24:54,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:24:54,542 INFO L481 AbstractCegarLoop]: Abstraction has 441 states and 644 transitions. [2020-10-27 05:24:54,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:24:54,542 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 644 transitions. [2020-10-27 05:24:54,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:24:54,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:24:54,543 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] [2020-10-27 05:24:54,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:24:54,544 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:24:54,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:24:54,544 INFO L82 PathProgramCache]: Analyzing trace with hash 184497353, now seen corresponding path program 1 times [2020-10-27 05:24:54,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:24:54,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [133163444] [2020-10-27 05:24:54,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:24:54,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:24:54,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:54,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:54,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:54,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:54,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:54,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:55,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:55,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:59,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:24:59,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:24:59,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:24:59,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:24:59,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:24:59,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 05:24:59,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:24:59,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 05:24:59,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:24:59,964 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:24:59,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:24:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:24:59,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:24:59,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:24:59,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:24:59,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:24:59,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:24:59,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:24:59,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:24:59,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:24:59,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:24:59,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:25:00,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:25:00,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [133163444] [2020-10-27 05:25:00,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:25:00,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:25:00,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744624665] [2020-10-27 05:25:00,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 05:25:00,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:25:00,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 05:25:00,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:25:00,029 INFO L87 Difference]: Start difference. First operand 441 states and 644 transitions. Second operand 7 states. [2020-10-27 05:25:00,359 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:25:01,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:25:01,226 INFO L93 Difference]: Finished difference Result 851 states and 1282 transitions. [2020-10-27 05:25:01,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:25:01,226 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 81 [2020-10-27 05:25:01,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:25:01,230 INFO L225 Difference]: With dead ends: 851 [2020-10-27 05:25:01,230 INFO L226 Difference]: Without dead ends: 630 [2020-10-27 05:25:01,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:25:01,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2020-10-27 05:25:01,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 401. [2020-10-27 05:25:01,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2020-10-27 05:25:01,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 586 transitions. [2020-10-27 05:25:01,307 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 586 transitions. Word has length 81 [2020-10-27 05:25:01,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:25:01,307 INFO L481 AbstractCegarLoop]: Abstraction has 401 states and 586 transitions. [2020-10-27 05:25:01,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 05:25:01,307 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 586 transitions. [2020-10-27 05:25:01,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:25:01,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:25:01,308 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] [2020-10-27 05:25:01,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:25:01,309 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:25:01,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:25:01,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1183707775, now seen corresponding path program 1 times [2020-10-27 05:25:01,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:25:01,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17912917] [2020-10-27 05:25:01,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:25:01,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:25:01,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:01,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:01,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:01,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:01,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:01,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:02,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:02,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:02,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:06,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:25:06,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:25:06,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:25:06,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:25:06,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:25:06,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:25:06,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:25:06,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 05:25:06,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:25:06,667 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:25:06,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:25:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:25:06,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:06,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:25:06,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:25:06,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:25:06,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:25:06,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:25:06,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:25:06,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:25:06,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:25:06,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:25:06,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:25:06,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17912917] [2020-10-27 05:25:06,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:25:06,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:25:06,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999746631] [2020-10-27 05:25:06,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:25:06,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:25:06,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:25:06,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:25:06,720 INFO L87 Difference]: Start difference. First operand 401 states and 586 transitions. Second operand 5 states. [2020-10-27 05:25:07,051 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 05:25:07,930 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:25:08,232 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:25:08,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:25:08,525 INFO L93 Difference]: Finished difference Result 689 states and 1035 transitions. [2020-10-27 05:25:08,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:25:08,526 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 81 [2020-10-27 05:25:08,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:25:08,529 INFO L225 Difference]: With dead ends: 689 [2020-10-27 05:25:08,529 INFO L226 Difference]: Without dead ends: 546 [2020-10-27 05:25:08,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:25:08,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-10-27 05:25:08,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 538. [2020-10-27 05:25:08,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 538 states. [2020-10-27 05:25:08,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 799 transitions. [2020-10-27 05:25:08,640 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 799 transitions. Word has length 81 [2020-10-27 05:25:08,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:25:08,641 INFO L481 AbstractCegarLoop]: Abstraction has 538 states and 799 transitions. [2020-10-27 05:25:08,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:25:08,641 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 799 transitions. [2020-10-27 05:25:08,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 05:25:08,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:25:08,642 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] [2020-10-27 05:25:08,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:25:08,642 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:25:08,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:25:08,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1152902597, now seen corresponding path program 1 times [2020-10-27 05:25:08,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:25:08,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221765098] [2020-10-27 05:25:08,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:25:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:25:08,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:08,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:08,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:08,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:08,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:09,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:10,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:25:10,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 05:25:10,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:25:10,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2112 [2020-10-27 05:25:10,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:25:10,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:25:10,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-27 05:25:10,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 05:25:10,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:25:11,077 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:25:11,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:25:11,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:25:11,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:11,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:25:11,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:25:11,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:25:11,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:25:11,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:25:11,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:25:11,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:25:11,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:25:11,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:25:11,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:25:11,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221765098] [2020-10-27 05:25:11,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:25:11,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:25:11,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906847350] [2020-10-27 05:25:11,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:25:11,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:25:11,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:25:11,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:25:11,118 INFO L87 Difference]: Start difference. First operand 538 states and 799 transitions. Second operand 4 states. [2020-10-27 05:25:11,423 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:25:12,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:25:12,154 INFO L93 Difference]: Finished difference Result 1358 states and 2065 transitions. [2020-10-27 05:25:12,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:25:12,155 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-27 05:25:12,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:25:12,159 INFO L225 Difference]: With dead ends: 1358 [2020-10-27 05:25:12,159 INFO L226 Difference]: Without dead ends: 889 [2020-10-27 05:25:12,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:25:12,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2020-10-27 05:25:12,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 886. [2020-10-27 05:25:12,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 886 states. [2020-10-27 05:25:12,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1334 transitions. [2020-10-27 05:25:12,292 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1334 transitions. Word has length 81 [2020-10-27 05:25:12,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:25:12,292 INFO L481 AbstractCegarLoop]: Abstraction has 886 states and 1334 transitions. [2020-10-27 05:25:12,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:25:12,292 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1334 transitions. [2020-10-27 05:25:12,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:25:12,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:25:12,293 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] [2020-10-27 05:25:12,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:25:12,294 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:25:12,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:25:12,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1958329855, now seen corresponding path program 1 times [2020-10-27 05:25:12,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:25:12,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081716844] [2020-10-27 05:25:12,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:25:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:25:12,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:12,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:12,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:12,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:12,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:13,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:15,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:25:15,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:25:15,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:25:15,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3424 [2020-10-27 05:25:15,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:25:15,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:25:15,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:25:15,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 05:25:15,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:25:16,062 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:25:16,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:25:16,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:25:16,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:16,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:25:16,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:25:16,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:25:16,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 05:25:16,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:25:16,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:25:16,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:25:16,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:25:16,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:25:16,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:25:16,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081716844] [2020-10-27 05:25:16,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:25:16,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:25:16,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802361734] [2020-10-27 05:25:16,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:25:16,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:25:16,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:25:16,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:25:16,135 INFO L87 Difference]: Start difference. First operand 886 states and 1334 transitions. Second operand 6 states. [2020-10-27 05:25:16,463 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 05:25:17,449 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:25:17,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:25:17,565 INFO L93 Difference]: Finished difference Result 2464 states and 3768 transitions. [2020-10-27 05:25:17,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:25:17,566 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 82 [2020-10-27 05:25:17,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:25:17,575 INFO L225 Difference]: With dead ends: 2464 [2020-10-27 05:25:17,575 INFO L226 Difference]: Without dead ends: 1643 [2020-10-27 05:25:17,578 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:25:17,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2020-10-27 05:25:17,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1640. [2020-10-27 05:25:17,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1640 states. [2020-10-27 05:25:17,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 2496 transitions. [2020-10-27 05:25:17,863 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 2496 transitions. Word has length 82 [2020-10-27 05:25:17,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:25:17,864 INFO L481 AbstractCegarLoop]: Abstraction has 1640 states and 2496 transitions. [2020-10-27 05:25:17,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:25:17,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 2496 transitions. [2020-10-27 05:25:17,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 05:25:17,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:25:17,865 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] [2020-10-27 05:25:17,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:25:17,865 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:25:17,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:25:17,866 INFO L82 PathProgramCache]: Analyzing trace with hash -630944666, now seen corresponding path program 1 times [2020-10-27 05:25:17,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:25:17,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051704080] [2020-10-27 05:25:17,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:25:17,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:25:17,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:17,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:17,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:18,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:18,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:18,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:25:18,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 05:25:18,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:25:18,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1026 [2020-10-27 05:25:18,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:25:18,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:25:18,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-27 05:25:18,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 05:25:18,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:25:19,208 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:25:19,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:25:19,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:25:19,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:19,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:25:19,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:25:19,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:25:19,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:25:19,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:25:19,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:25:19,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:25:19,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:25:19,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:25:19,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:25:19,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051704080] [2020-10-27 05:25:19,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:25:19,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:25:19,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630560641] [2020-10-27 05:25:19,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:25:19,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:25:19,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:25:19,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:25:19,241 INFO L87 Difference]: Start difference. First operand 1640 states and 2496 transitions. Second operand 4 states. [2020-10-27 05:25:19,555 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:25:20,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:25:20,587 INFO L93 Difference]: Finished difference Result 4520 states and 6932 transitions. [2020-10-27 05:25:20,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:25:20,588 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-27 05:25:20,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:25:20,601 INFO L225 Difference]: With dead ends: 4520 [2020-10-27 05:25:20,601 INFO L226 Difference]: Without dead ends: 2961 [2020-10-27 05:25:20,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:25:20,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2961 states. [2020-10-27 05:25:21,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2961 to 2958. [2020-10-27 05:25:21,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2958 states. [2020-10-27 05:25:21,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2958 states to 2958 states and 4500 transitions. [2020-10-27 05:25:21,188 INFO L78 Accepts]: Start accepts. Automaton has 2958 states and 4500 transitions. Word has length 82 [2020-10-27 05:25:21,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:25:21,188 INFO L481 AbstractCegarLoop]: Abstraction has 2958 states and 4500 transitions. [2020-10-27 05:25:21,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:25:21,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2958 states and 4500 transitions. [2020-10-27 05:25:21,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 05:25:21,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:25:21,190 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] [2020-10-27 05:25:21,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:25:21,190 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:25:21,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:25:21,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1346062581, now seen corresponding path program 1 times [2020-10-27 05:25:21,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:25:21,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339731540] [2020-10-27 05:25:21,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:25:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:25:21,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:21,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:21,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:21,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:21,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:23,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:25:23,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 05:25:23,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:25:23,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2107 [2020-10-27 05:25:23,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:25:23,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:25:23,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:25:23,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 05:25:23,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:25:23,678 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:25:23,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:25:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:25:23,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:23,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:25:23,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:25:23,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:25:23,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 05:25:23,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:25:23,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:25:23,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:25:23,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:25:23,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:25:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:25:23,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339731540] [2020-10-27 05:25:23,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:25:23,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:25:23,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402423103] [2020-10-27 05:25:23,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:25:23,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:25:23,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:25:23,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:25:23,750 INFO L87 Difference]: Start difference. First operand 2958 states and 4500 transitions. Second operand 6 states. [2020-10-27 05:25:24,119 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 05:25:25,237 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:25:25,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:25:25,738 INFO L93 Difference]: Finished difference Result 8654 states and 13224 transitions. [2020-10-27 05:25:25,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:25:25,739 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2020-10-27 05:25:25,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:25:25,761 INFO L225 Difference]: With dead ends: 8654 [2020-10-27 05:25:25,761 INFO L226 Difference]: Without dead ends: 5773 [2020-10-27 05:25:25,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:25:25,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5773 states. [2020-10-27 05:25:26,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5773 to 5770. [2020-10-27 05:25:26,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5770 states. [2020-10-27 05:25:26,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5770 states to 5770 states and 8782 transitions. [2020-10-27 05:25:26,702 INFO L78 Accepts]: Start accepts. Automaton has 5770 states and 8782 transitions. Word has length 83 [2020-10-27 05:25:26,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:25:26,703 INFO L481 AbstractCegarLoop]: Abstraction has 5770 states and 8782 transitions. [2020-10-27 05:25:26,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:25:26,703 INFO L276 IsEmpty]: Start isEmpty. Operand 5770 states and 8782 transitions. [2020-10-27 05:25:26,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 05:25:26,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:25:26,704 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] [2020-10-27 05:25:26,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:25:26,704 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:25:26,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:25:26,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1090482726, now seen corresponding path program 1 times [2020-10-27 05:25:26,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:25:26,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422929472] [2020-10-27 05:25:26,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:25:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:25:26,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:26,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:26,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:26,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:27,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:25:27,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 05:25:27,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:25:27,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 548 [2020-10-27 05:25:27,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:25:27,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:25:27,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 05:25:27,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 05:25:27,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:25:27,603 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:25:27,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:25:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:25:27,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:27,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:25:27,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:25:27,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:25:27,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:25:27,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:25:27,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:25:27,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:25:27,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:25:27,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:25:27,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:25:27,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422929472] [2020-10-27 05:25:27,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:25:27,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:25:27,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923252335] [2020-10-27 05:25:27,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:25:27,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:25:27,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:25:27,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:25:27,638 INFO L87 Difference]: Start difference. First operand 5770 states and 8782 transitions. Second operand 4 states. [2020-10-27 05:25:27,947 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:25:30,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:25:30,023 INFO L93 Difference]: Finished difference Result 16326 states and 24848 transitions. [2020-10-27 05:25:30,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:25:30,024 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-27 05:25:30,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:25:30,063 INFO L225 Difference]: With dead ends: 16326 [2020-10-27 05:25:30,063 INFO L226 Difference]: Without dead ends: 10649 [2020-10-27 05:25:30,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:25:30,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10649 states. [2020-10-27 05:25:31,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10649 to 10646. [2020-10-27 05:25:31,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10646 states. [2020-10-27 05:25:31,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10646 states to 10646 states and 16072 transitions. [2020-10-27 05:25:31,589 INFO L78 Accepts]: Start accepts. Automaton has 10646 states and 16072 transitions. Word has length 83 [2020-10-27 05:25:31,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:25:31,589 INFO L481 AbstractCegarLoop]: Abstraction has 10646 states and 16072 transitions. [2020-10-27 05:25:31,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:25:31,589 INFO L276 IsEmpty]: Start isEmpty. Operand 10646 states and 16072 transitions. [2020-10-27 05:25:31,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 05:25:31,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:25:31,590 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] [2020-10-27 05:25:31,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:25:31,590 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:25:31,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:25:31,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1223336062, now seen corresponding path program 1 times [2020-10-27 05:25:31,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:25:31,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037258921] [2020-10-27 05:25:31,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:25:31,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:25:31,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:31,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:31,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:31,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:32,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:25:32,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 05:25:32,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:25:32,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1126 [2020-10-27 05:25:32,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:25:32,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:25:32,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:25:32,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 05:25:32,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:25:33,046 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:25:33,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:25:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:25:33,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:33,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:25:33,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:25:33,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:25:33,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:25:33,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:25:33,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:25:33,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:25:33,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:25:33,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:25:33,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:25:33,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037258921] [2020-10-27 05:25:33,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:25:33,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:25:33,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107576671] [2020-10-27 05:25:33,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:25:33,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:25:33,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:25:33,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:25:33,090 INFO L87 Difference]: Start difference. First operand 10646 states and 16072 transitions. Second operand 6 states. [2020-10-27 05:25:33,419 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:25:35,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:25:35,456 INFO L93 Difference]: Finished difference Result 21203 states and 32044 transitions. [2020-10-27 05:25:35,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:25:35,457 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2020-10-27 05:25:35,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:25:35,476 INFO L225 Difference]: With dead ends: 21203 [2020-10-27 05:25:35,476 INFO L226 Difference]: Without dead ends: 10646 [2020-10-27 05:25:35,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:25:35,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10646 states. [2020-10-27 05:25:37,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10646 to 10646. [2020-10-27 05:25:37,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10646 states. [2020-10-27 05:25:37,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10646 states to 10646 states and 15974 transitions. [2020-10-27 05:25:37,122 INFO L78 Accepts]: Start accepts. Automaton has 10646 states and 15974 transitions. Word has length 84 [2020-10-27 05:25:37,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:25:37,122 INFO L481 AbstractCegarLoop]: Abstraction has 10646 states and 15974 transitions. [2020-10-27 05:25:37,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:25:37,122 INFO L276 IsEmpty]: Start isEmpty. Operand 10646 states and 15974 transitions. [2020-10-27 05:25:37,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 05:25:37,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:25:37,124 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] [2020-10-27 05:25:37,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:25:37,124 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:25:37,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:25:37,124 INFO L82 PathProgramCache]: Analyzing trace with hash -249372953, now seen corresponding path program 1 times [2020-10-27 05:25:37,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:25:37,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978083936] [2020-10-27 05:25:37,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:25:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:25:37,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:37,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:37,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:37,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:25:37,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 05:25:37,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:25:37,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 334 [2020-10-27 05:25:37,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:25:37,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:25:37,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-27 05:25:37,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 05:25:37,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:25:37,772 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:25:37,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:25:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:25:37,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:37,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:25:37,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:25:37,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:25:37,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:25:37,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:25:37,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:25:37,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:25:37,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:25:37,786 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:25:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:25:37,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978083936] [2020-10-27 05:25:37,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:25:37,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:25:37,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046857520] [2020-10-27 05:25:37,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:25:37,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:25:37,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:25:37,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:25:37,802 INFO L87 Difference]: Start difference. First operand 10646 states and 15974 transitions. Second operand 4 states. [2020-10-27 05:25:38,115 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:25:41,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:25:41,542 INFO L93 Difference]: Finished difference Result 30178 states and 45170 transitions. [2020-10-27 05:25:41,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:25:41,542 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-27 05:25:41,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:25:41,580 INFO L225 Difference]: With dead ends: 30178 [2020-10-27 05:25:41,581 INFO L226 Difference]: Without dead ends: 19637 [2020-10-27 05:25:41,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:25:41,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19637 states. [2020-10-27 05:25:44,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19637 to 19634. [2020-10-27 05:25:44,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19634 states. [2020-10-27 05:25:44,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19634 states to 19634 states and 29120 transitions. [2020-10-27 05:25:44,588 INFO L78 Accepts]: Start accepts. Automaton has 19634 states and 29120 transitions. Word has length 84 [2020-10-27 05:25:44,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:25:44,589 INFO L481 AbstractCegarLoop]: Abstraction has 19634 states and 29120 transitions. [2020-10-27 05:25:44,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:25:44,589 INFO L276 IsEmpty]: Start isEmpty. Operand 19634 states and 29120 transitions. [2020-10-27 05:25:44,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 05:25:44,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:25:44,590 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] [2020-10-27 05:25:44,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:25:44,590 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:25:44,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:25:44,591 INFO L82 PathProgramCache]: Analyzing trace with hash -642075230, now seen corresponding path program 1 times [2020-10-27 05:25:44,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:25:44,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379317660] [2020-10-27 05:25:44,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:25:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:25:44,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:44,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:44,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:45,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:25:45,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 05:25:45,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:25:45,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 557 [2020-10-27 05:25:45,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:25:45,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:25:45,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:25:45,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 05:25:45,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:25:45,490 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:25:45,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:25:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:25:45,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:45,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:25:45,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:25:45,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:25:45,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:25:45,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:25:45,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:25:45,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:25:45,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:25:45,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:25:45,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:25:45,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379317660] [2020-10-27 05:25:45,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:25:45,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:25:45,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964295123] [2020-10-27 05:25:45,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:25:45,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:25:45,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:25:45,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:25:45,533 INFO L87 Difference]: Start difference. First operand 19634 states and 29120 transitions. Second operand 6 states. [2020-10-27 05:25:45,860 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 05:25:47,694 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:25:52,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:25:52,234 INFO L93 Difference]: Finished difference Result 58498 states and 86736 transitions. [2020-10-27 05:25:52,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:25:52,234 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 85 [2020-10-27 05:25:52,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:25:52,315 INFO L225 Difference]: With dead ends: 58498 [2020-10-27 05:25:52,315 INFO L226 Difference]: Without dead ends: 38965 [2020-10-27 05:25:52,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:25:52,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38965 states. [2020-10-27 05:25:58,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38965 to 38962. [2020-10-27 05:25:58,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38962 states. [2020-10-27 05:25:58,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38962 states to 38962 states and 57534 transitions. [2020-10-27 05:25:58,746 INFO L78 Accepts]: Start accepts. Automaton has 38962 states and 57534 transitions. Word has length 85 [2020-10-27 05:25:58,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:25:58,746 INFO L481 AbstractCegarLoop]: Abstraction has 38962 states and 57534 transitions. [2020-10-27 05:25:58,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:25:58,747 INFO L276 IsEmpty]: Start isEmpty. Operand 38962 states and 57534 transitions. [2020-10-27 05:25:58,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 05:25:58,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:25:58,747 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] [2020-10-27 05:25:58,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 05:25:58,747 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:25:58,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:25:58,748 INFO L82 PathProgramCache]: Analyzing trace with hash 223457159, now seen corresponding path program 1 times [2020-10-27 05:25:58,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:25:58,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933344372] [2020-10-27 05:25:58,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:25:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:25:58,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:58,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:58,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:25:58,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 05:25:58,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:25:58,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-10-27 05:25:58,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:25:58,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:25:58,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 05:25:58,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:25:58,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:25:59,262 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:25:59,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:25:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:25:59,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:25:59,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:25:59,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:25:59,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:25:59,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:25:59,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:25:59,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:25:59,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:25:59,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:25:59,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:25:59,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:25:59,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933344372] [2020-10-27 05:25:59,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:25:59,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:25:59,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105118105] [2020-10-27 05:25:59,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:25:59,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:25:59,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:25:59,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:25:59,303 INFO L87 Difference]: Start difference. First operand 38962 states and 57534 transitions. Second operand 4 states. [2020-10-27 05:25:59,621 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:26:10,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:26:10,602 INFO L93 Difference]: Finished difference Result 110520 states and 162370 transitions. [2020-10-27 05:26:10,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:26:10,603 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 85 [2020-10-27 05:26:10,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:26:10,707 INFO L225 Difference]: With dead ends: 110520 [2020-10-27 05:26:10,707 INFO L226 Difference]: Without dead ends: 71667 [2020-10-27 05:26:10,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:26:10,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71667 states. [2020-10-27 05:26:21,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71667 to 71607. [2020-10-27 05:26:21,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71607 states. [2020-10-27 05:26:22,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71607 states to 71607 states and 104119 transitions. [2020-10-27 05:26:22,025 INFO L78 Accepts]: Start accepts. Automaton has 71607 states and 104119 transitions. Word has length 85 [2020-10-27 05:26:22,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:26:22,025 INFO L481 AbstractCegarLoop]: Abstraction has 71607 states and 104119 transitions. [2020-10-27 05:26:22,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:26:22,025 INFO L276 IsEmpty]: Start isEmpty. Operand 71607 states and 104119 transitions. [2020-10-27 05:26:22,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 05:26:22,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:26:22,026 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] [2020-10-27 05:26:22,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 05:26:22,026 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:26:22,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:26:22,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1903450880, now seen corresponding path program 1 times [2020-10-27 05:26:22,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:26:22,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22989280] [2020-10-27 05:26:22,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:26:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:26:22,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:22,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:26:22,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 05:26:22,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:26:22,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 311 [2020-10-27 05:26:22,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:26:22,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:26:22,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-27 05:26:22,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 05:26:22,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:26:22,688 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:26:22,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:26:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:26:22,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:22,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:26:22,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:26:22,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:26:22,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:26:22,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:26:22,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:26:22,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:26:22,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:26:22,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:26:22,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:26:22,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22989280] [2020-10-27 05:26:22,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:26:22,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:26:22,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858875946] [2020-10-27 05:26:22,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:26:22,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:26:22,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:26:22,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:26:22,814 INFO L87 Difference]: Start difference. First operand 71607 states and 104119 transitions. Second operand 5 states. [2020-10-27 05:26:40,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:26:40,448 INFO L93 Difference]: Finished difference Result 114075 states and 165560 transitions. [2020-10-27 05:26:40,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:26:40,449 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 86 [2020-10-27 05:26:40,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:26:40,689 INFO L225 Difference]: With dead ends: 114075 [2020-10-27 05:26:40,689 INFO L226 Difference]: Without dead ends: 114072 [2020-10-27 05:26:40,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:26:40,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114072 states. [2020-10-27 05:26:52,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114072 to 72631. [2020-10-27 05:26:52,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72631 states. [2020-10-27 05:26:52,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72631 states to 72631 states and 104631 transitions. [2020-10-27 05:26:52,791 INFO L78 Accepts]: Start accepts. Automaton has 72631 states and 104631 transitions. Word has length 86 [2020-10-27 05:26:52,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:26:52,792 INFO L481 AbstractCegarLoop]: Abstraction has 72631 states and 104631 transitions. [2020-10-27 05:26:52,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:26:52,792 INFO L276 IsEmpty]: Start isEmpty. Operand 72631 states and 104631 transitions. [2020-10-27 05:26:52,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-27 05:26:52,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:26:52,813 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:26:52,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 05:26:52,813 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:26:52,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:26:52,814 INFO L82 PathProgramCache]: Analyzing trace with hash -2074962194, now seen corresponding path program 1 times [2020-10-27 05:26:52,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:26:52,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933032993] [2020-10-27 05:26:52,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:26:52,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:26:52,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:52,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:52,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:52,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:53,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:53,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:55,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:55,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:56,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:56,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:56,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:57,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:57,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:26:57,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-27 05:26:57,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:26:57,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 05:26:57,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:26:57,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:26:57,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:26:57,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-27 05:26:57,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:26:58,290 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-27 05:26:58,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:26:58,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:26:58,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:26:58,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:26:58,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:26:58,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:26:58,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:26:58,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:26:58,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:26:58,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:26:58,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:26:58,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:26:58,347 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:26:58,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933032993] [2020-10-27 05:26:58,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:26:58,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:26:58,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610559414] [2020-10-27 05:26:58,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:26:58,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:26:58,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:26:58,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:26:58,348 INFO L87 Difference]: Start difference. First operand 72631 states and 104631 transitions. Second operand 11 states. [2020-10-27 05:26:58,737 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-27 05:27:04,847 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 05:27:05,683 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 05:27:06,028 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 185