/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_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:54:55,641 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:54:55,643 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:54:55,699 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:54:55,700 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:54:55,706 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:54:55,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:54:55,713 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:54:55,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:54:55,723 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:54:55,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:54:55,726 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:54:55,727 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:54:55,730 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:54:55,733 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:54:55,736 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:54:55,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:54:55,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:54:55,749 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:54:55,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:54:55,760 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:54:55,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:54:55,764 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:54:55,767 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:54:55,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:54:55,795 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:54:55,795 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:54:55,796 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:54:55,797 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:54:55,798 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:54:55,798 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:54:55,799 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:54:55,800 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:54:55,801 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:54:55,802 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:54:55,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:54:55,803 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:54:55,804 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:54:55,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:54:55,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:54:55,819 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:54:55,820 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 05:54:55,868 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:54:55,868 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:54:55,872 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:54:55,873 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:54:55,873 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:54:55,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:54:55,873 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:54:55,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:54:55,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:54:55,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:54:55,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:54:55,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:54:55,875 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:54:55,876 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:54:55,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:54:55,876 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:54:55,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:54:55,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:54:55,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:54:55,877 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:54:55,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:54:55,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:54:55,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:54:55,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:54:55,878 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:54:55,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:54:55,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:54:55,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:54:55,879 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:54:55,879 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:54:56,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:54:56,327 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:54:56,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:54:56,333 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:54:56,334 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:54:56,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-27 05:54:56,432 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/de566bc58/40fbb2af745c41c9b4a8cca5a833c238/FLAG766a39252 [2020-10-27 05:54:57,190 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:54:57,191 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-27 05:54:57,214 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/de566bc58/40fbb2af745c41c9b4a8cca5a833c238/FLAG766a39252 [2020-10-27 05:54:57,481 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/de566bc58/40fbb2af745c41c9b4a8cca5a833c238 [2020-10-27 05:54:57,485 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:54:57,497 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:54:57,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:54:57,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:54:57,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:54:57,507 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:54:57" (1/1) ... [2020-10-27 05:54:57,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@374e61f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:57, skipping insertion in model container [2020-10-27 05:54:57,512 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:54:57" (1/1) ... [2020-10-27 05:54:57,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:54:57,600 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:54:57,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:54:58,007 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:54:58,167 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:54:58,210 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:54:58,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:58 WrapperNode [2020-10-27 05:54:58,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:54:58,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:54:58,212 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:54:58,212 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:54:58,227 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:58" (1/1) ... [2020-10-27 05:54:58,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:58" (1/1) ... [2020-10-27 05:54:58,241 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:58" (1/1) ... [2020-10-27 05:54:58,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:58" (1/1) ... [2020-10-27 05:54:58,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:58" (1/1) ... [2020-10-27 05:54:58,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:58" (1/1) ... [2020-10-27 05:54:58,274 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:58" (1/1) ... [2020-10-27 05:54:58,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:54:58,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:54:58,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:54:58,282 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:54:58,283 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:58" (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 05:54:58,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:54:58,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:54:58,367 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:54:58,367 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:54:58,368 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:54:58,368 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:54:58,368 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:54:58,368 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:54:58,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:54:58,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:54:58,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:54:58,369 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:54:58,369 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:54:58,369 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:54:58,369 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:54:58,369 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:54:58,369 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:54:58,370 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:54:58,370 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:54:58,370 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:54:58,370 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:54:58,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:54:58,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:54:58,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:54:58,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:54:58,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:54:58,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:54:59,301 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:54:59,301 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:54:59,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:54:59 BoogieIcfgContainer [2020-10-27 05:54:59,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:54:59,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:54:59,306 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:54:59,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:54:59,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:54:57" (1/3) ... [2020-10-27 05:54:59,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@304f42b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:54:59, skipping insertion in model container [2020-10-27 05:54:59,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:54:58" (2/3) ... [2020-10-27 05:54:59,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@304f42b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:54:59, skipping insertion in model container [2020-10-27 05:54:59,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:54:59" (3/3) ... [2020-10-27 05:54:59,313 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-27 05:54:59,327 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:54:59,334 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:54:59,361 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:54:59,397 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:54:59,398 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:54:59,398 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:54:59,398 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:54:59,398 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:54:59,398 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:54:59,398 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:54:59,398 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:54:59,421 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states. [2020-10-27 05:54:59,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 05:54:59,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:54:59,433 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] [2020-10-27 05:54:59,433 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:54:59,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:54:59,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1445642755, now seen corresponding path program 1 times [2020-10-27 05:54:59,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:54:59,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938748008] [2020-10-27 05:54:59,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:54:59,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:54:59,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:00,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:00,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:00,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:03,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:03,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 05:55:03,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:55:03,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3593 [2020-10-27 05:55:03,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:03,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:55:03,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-27 05:55:03,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 05:55:03,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:55:03,864 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:55:03,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:03,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:03,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:03,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:03,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:03,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 05:55:03,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:03,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:55:03,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:03,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:55:03,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:55:03,956 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 05:55:03,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938748008] [2020-10-27 05:55:03,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:03,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:55:03,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875059769] [2020-10-27 05:55:03,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:55:03,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:03,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:55:03,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:55:03,993 INFO L87 Difference]: Start difference. First operand 152 states. Second operand 4 states. [2020-10-27 05:55:04,364 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-27 05:55:05,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:05,169 INFO L93 Difference]: Finished difference Result 330 states and 550 transitions. [2020-10-27 05:55:05,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:55:05,171 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-27 05:55:05,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:05,184 INFO L225 Difference]: With dead ends: 330 [2020-10-27 05:55:05,184 INFO L226 Difference]: Without dead ends: 225 [2020-10-27 05:55:05,188 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 05:55:05,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-27 05:55:05,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2020-10-27 05:55:05,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-27 05:55:05,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 348 transitions. [2020-10-27 05:55:05,256 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 348 transitions. Word has length 61 [2020-10-27 05:55:05,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:55:05,257 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 348 transitions. [2020-10-27 05:55:05,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:55:05,257 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 348 transitions. [2020-10-27 05:55:05,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 05:55:05,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:05,262 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] [2020-10-27 05:55:05,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:55:05,262 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:05,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:05,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1821419068, now seen corresponding path program 1 times [2020-10-27 05:55:05,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:05,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508799032] [2020-10-27 05:55:05,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:05,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:05,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:05,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:05,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:05,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:07,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:10,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:10,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 05:55:10,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:55:10,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 05:55:10,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:10,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:55:10,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:55:10,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 05:55:10,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:55:10,780 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:55:10,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:10,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:10,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:10,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:10,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:10,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:55:10,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:10,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:55:10,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:10,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:55:10,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:10,834 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 05:55:10,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508799032] [2020-10-27 05:55:10,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:10,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:55:10,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329791616] [2020-10-27 05:55:10,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:55:10,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:10,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:55:10,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:55:10,839 INFO L87 Difference]: Start difference. First operand 222 states and 348 transitions. Second operand 5 states. [2020-10-27 05:55:12,506 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 05:55:12,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:12,617 INFO L93 Difference]: Finished difference Result 615 states and 963 transitions. [2020-10-27 05:55:12,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:55:12,619 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-10-27 05:55:12,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:12,630 INFO L225 Difference]: With dead ends: 615 [2020-10-27 05:55:12,630 INFO L226 Difference]: Without dead ends: 422 [2020-10-27 05:55:12,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:55:12,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-10-27 05:55:12,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 419. [2020-10-27 05:55:12,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2020-10-27 05:55:12,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 655 transitions. [2020-10-27 05:55:12,693 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 655 transitions. Word has length 63 [2020-10-27 05:55:12,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:55:12,693 INFO L481 AbstractCegarLoop]: Abstraction has 419 states and 655 transitions. [2020-10-27 05:55:12,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:55:12,694 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 655 transitions. [2020-10-27 05:55:12,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 05:55:12,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:12,698 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] [2020-10-27 05:55:12,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:55:12,699 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:12,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:12,699 INFO L82 PathProgramCache]: Analyzing trace with hash 18658303, now seen corresponding path program 1 times [2020-10-27 05:55:12,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:12,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741197520] [2020-10-27 05:55:12,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:12,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:12,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:12,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:13,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:13,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:15,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:15,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 05:55:15,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:55:15,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2774 [2020-10-27 05:55:15,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:15,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:55:15,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:55:15,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:55:15,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:15,963 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:55:15,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:15,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:15,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:15,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:15,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:15,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 05:55:15,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:15,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:55:15,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:15,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:55:15,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:55:16,022 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 05:55:16,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741197520] [2020-10-27 05:55:16,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:16,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:55:16,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466092294] [2020-10-27 05:55:16,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:55:16,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:16,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:55:16,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:55:16,026 INFO L87 Difference]: Start difference. First operand 419 states and 655 transitions. Second operand 5 states. [2020-10-27 05:55:17,295 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 05:55:17,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:17,392 INFO L93 Difference]: Finished difference Result 1189 states and 1856 transitions. [2020-10-27 05:55:17,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:55:17,393 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-10-27 05:55:17,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:17,399 INFO L225 Difference]: With dead ends: 1189 [2020-10-27 05:55:17,399 INFO L226 Difference]: Without dead ends: 802 [2020-10-27 05:55:17,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:55:17,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2020-10-27 05:55:17,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 799. [2020-10-27 05:55:17,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 799 states. [2020-10-27 05:55:17,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1241 transitions. [2020-10-27 05:55:17,498 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1241 transitions. Word has length 64 [2020-10-27 05:55:17,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:55:17,499 INFO L481 AbstractCegarLoop]: Abstraction has 799 states and 1241 transitions. [2020-10-27 05:55:17,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:55:17,499 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1241 transitions. [2020-10-27 05:55:17,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 05:55:17,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:17,505 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] [2020-10-27 05:55:17,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:55:17,505 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:17,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:17,506 INFO L82 PathProgramCache]: Analyzing trace with hash 2067872150, now seen corresponding path program 1 times [2020-10-27 05:55:17,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:17,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314402122] [2020-10-27 05:55:17,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:17,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:17,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:17,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:17,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:17,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:18,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:20,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:22,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:22,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 05:55:22,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:55:22,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 05:55:22,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:22,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:55:22,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:55:22,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 05:55:22,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 05:55:22,966 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:55:22,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:22,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:22,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:22,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:22,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:22,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:55:22,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:22,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:55:22,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:22,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:55:22,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:23,014 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 05:55:23,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314402122] [2020-10-27 05:55:23,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:23,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:55:23,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68576688] [2020-10-27 05:55:23,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:55:23,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:23,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:55:23,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:55:23,017 INFO L87 Difference]: Start difference. First operand 799 states and 1241 transitions. Second operand 5 states. [2020-10-27 05:55:24,342 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 05:55:24,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:24,478 INFO L93 Difference]: Finished difference Result 2245 states and 3473 transitions. [2020-10-27 05:55:24,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:55:24,479 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-10-27 05:55:24,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:24,489 INFO L225 Difference]: With dead ends: 2245 [2020-10-27 05:55:24,489 INFO L226 Difference]: Without dead ends: 1514 [2020-10-27 05:55:24,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:55:24,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2020-10-27 05:55:24,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1511. [2020-10-27 05:55:24,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1511 states. [2020-10-27 05:55:24,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1511 states to 1511 states and 2327 transitions. [2020-10-27 05:55:24,646 INFO L78 Accepts]: Start accepts. Automaton has 1511 states and 2327 transitions. Word has length 64 [2020-10-27 05:55:24,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:55:24,646 INFO L481 AbstractCegarLoop]: Abstraction has 1511 states and 2327 transitions. [2020-10-27 05:55:24,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:55:24,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1511 states and 2327 transitions. [2020-10-27 05:55:24,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 05:55:24,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:24,651 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] [2020-10-27 05:55:24,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:55:24,652 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:24,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:24,653 INFO L82 PathProgramCache]: Analyzing trace with hash -746045749, now seen corresponding path program 1 times [2020-10-27 05:55:24,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:24,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925648195] [2020-10-27 05:55:24,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:24,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:24,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:24,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:24,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:25,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:26,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:29,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:29,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 05:55:29,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:55:29,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4975 [2020-10-27 05:55:29,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:29,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:55:29,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:55:29,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:55:29,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:30,116 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:55:30,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:30,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:30,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:30,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:30,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:30,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:30,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:55:30,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:30,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:55:30,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:30,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:55:30,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:30,163 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 05:55:30,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925648195] [2020-10-27 05:55:30,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:30,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:55:30,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129607055] [2020-10-27 05:55:30,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:55:30,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:30,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:55:30,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:55:30,167 INFO L87 Difference]: Start difference. First operand 1511 states and 2327 transitions. Second operand 5 states. [2020-10-27 05:55:30,536 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-27 05:55:31,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:31,711 INFO L93 Difference]: Finished difference Result 2659 states and 4084 transitions. [2020-10-27 05:55:31,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:55:31,712 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-10-27 05:55:31,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:31,724 INFO L225 Difference]: With dead ends: 2659 [2020-10-27 05:55:31,724 INFO L226 Difference]: Without dead ends: 1932 [2020-10-27 05:55:31,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:55:31,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1932 states. [2020-10-27 05:55:31,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1932 to 1929. [2020-10-27 05:55:31,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1929 states. [2020-10-27 05:55:31,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 2921 transitions. [2020-10-27 05:55:31,910 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 2921 transitions. Word has length 65 [2020-10-27 05:55:31,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:55:31,911 INFO L481 AbstractCegarLoop]: Abstraction has 1929 states and 2921 transitions. [2020-10-27 05:55:31,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:55:31,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 2921 transitions. [2020-10-27 05:55:31,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 05:55:31,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:31,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:55:31,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:55:31,917 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:31,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:31,918 INFO L82 PathProgramCache]: Analyzing trace with hash -312443461, now seen corresponding path program 1 times [2020-10-27 05:55:31,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:31,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183456648] [2020-10-27 05:55:31,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:31,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:32,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:32,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:32,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:32,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 05:55:32,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:55:32,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 667 [2020-10-27 05:55:32,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:32,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:55:32,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 05:55:32,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 05:55:32,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:32,966 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:55:32,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:32,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:32,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:32,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:32,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:32,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:55:32,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:32,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:55:32,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:32,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:55:32,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:33,007 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 05:55:33,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183456648] [2020-10-27 05:55:33,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:33,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:55:33,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521464137] [2020-10-27 05:55:33,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:55:33,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:33,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:55:33,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:55:33,010 INFO L87 Difference]: Start difference. First operand 1929 states and 2921 transitions. Second operand 4 states. [2020-10-27 05:55:33,343 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-27 05:55:34,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:34,356 INFO L93 Difference]: Finished difference Result 4637 states and 7295 transitions. [2020-10-27 05:55:34,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:55:34,357 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-27 05:55:34,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:34,379 INFO L225 Difference]: With dead ends: 4637 [2020-10-27 05:55:34,379 INFO L226 Difference]: Without dead ends: 3208 [2020-10-27 05:55:34,385 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 05:55:34,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3208 states. [2020-10-27 05:55:34,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3208 to 3205. [2020-10-27 05:55:34,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3205 states. [2020-10-27 05:55:34,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3205 states to 3205 states and 4961 transitions. [2020-10-27 05:55:34,708 INFO L78 Accepts]: Start accepts. Automaton has 3205 states and 4961 transitions. Word has length 65 [2020-10-27 05:55:34,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:55:34,708 INFO L481 AbstractCegarLoop]: Abstraction has 3205 states and 4961 transitions. [2020-10-27 05:55:34,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:55:34,709 INFO L276 IsEmpty]: Start isEmpty. Operand 3205 states and 4961 transitions. [2020-10-27 05:55:34,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 05:55:34,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:34,715 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] [2020-10-27 05:55:34,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:55:34,715 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:34,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:34,716 INFO L82 PathProgramCache]: Analyzing trace with hash -79999052, now seen corresponding path program 1 times [2020-10-27 05:55:34,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:34,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517383712] [2020-10-27 05:55:34,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:34,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:34,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:34,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:34,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:35,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:35,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:35,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:38,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:38,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 05:55:38,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:55:38,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3884 [2020-10-27 05:55:38,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:38,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:55:38,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:55:38,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:55:38,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:39,034 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:55:39,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:39,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:39,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:39,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:39,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:39,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:55:39,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:39,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:55:39,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:39,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:55:39,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:39,080 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 05:55:39,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517383712] [2020-10-27 05:55:39,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:39,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:55:39,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398037931] [2020-10-27 05:55:39,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:55:39,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:39,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:55:39,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:55:39,086 INFO L87 Difference]: Start difference. First operand 3205 states and 4961 transitions. Second operand 5 states. [2020-10-27 05:55:40,477 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 05:55:40,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:40,805 INFO L93 Difference]: Finished difference Result 9249 states and 14284 transitions. [2020-10-27 05:55:40,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:55:40,806 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 67 [2020-10-27 05:55:40,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:40,839 INFO L225 Difference]: With dead ends: 9249 [2020-10-27 05:55:40,839 INFO L226 Difference]: Without dead ends: 6116 [2020-10-27 05:55:40,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:55:40,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6116 states. [2020-10-27 05:55:41,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6116 to 6113. [2020-10-27 05:55:41,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6113 states. [2020-10-27 05:55:41,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6113 states to 6113 states and 9355 transitions. [2020-10-27 05:55:41,525 INFO L78 Accepts]: Start accepts. Automaton has 6113 states and 9355 transitions. Word has length 67 [2020-10-27 05:55:41,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:55:41,526 INFO L481 AbstractCegarLoop]: Abstraction has 6113 states and 9355 transitions. [2020-10-27 05:55:41,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:55:41,526 INFO L276 IsEmpty]: Start isEmpty. Operand 6113 states and 9355 transitions. [2020-10-27 05:55:41,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:55:41,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:41,537 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] [2020-10-27 05:55:41,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:55:41,538 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:41,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:41,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1747997990, now seen corresponding path program 1 times [2020-10-27 05:55:41,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:41,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328692578] [2020-10-27 05:55:41,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:41,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:41,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:41,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:41,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:42,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:43,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:43,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:55:43,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:55:43,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1528 [2020-10-27 05:55:43,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:43,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:55:43,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:55:43,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:55:43,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:43,538 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:55:43,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:43,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:43,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:43,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:43,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:43,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:55:43,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:43,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:55:43,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:43,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:55:43,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:43,589 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 05:55:43,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328692578] [2020-10-27 05:55:43,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:43,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:55:43,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599967934] [2020-10-27 05:55:43,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:55:43,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:43,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:55:43,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:55:43,600 INFO L87 Difference]: Start difference. First operand 6113 states and 9355 transitions. Second operand 5 states. [2020-10-27 05:55:45,443 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 05:55:45,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:45,869 INFO L93 Difference]: Finished difference Result 16841 states and 26050 transitions. [2020-10-27 05:55:45,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:55:45,870 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-27 05:55:45,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:45,941 INFO L225 Difference]: With dead ends: 16841 [2020-10-27 05:55:45,941 INFO L226 Difference]: Without dead ends: 11666 [2020-10-27 05:55:45,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:55:45,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11666 states. [2020-10-27 05:55:47,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11666 to 11663. [2020-10-27 05:55:47,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11663 states. [2020-10-27 05:55:47,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11663 states to 11663 states and 17682 transitions. [2020-10-27 05:55:47,134 INFO L78 Accepts]: Start accepts. Automaton has 11663 states and 17682 transitions. Word has length 68 [2020-10-27 05:55:47,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:55:47,134 INFO L481 AbstractCegarLoop]: Abstraction has 11663 states and 17682 transitions. [2020-10-27 05:55:47,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:55:47,134 INFO L276 IsEmpty]: Start isEmpty. Operand 11663 states and 17682 transitions. [2020-10-27 05:55:47,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:55:47,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:47,155 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] [2020-10-27 05:55:47,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:55:47,155 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:47,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:47,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1032282122, now seen corresponding path program 1 times [2020-10-27 05:55:47,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:47,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890485348] [2020-10-27 05:55:47,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:47,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:47,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:47,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:47,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:47,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:48,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:48,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:55:48,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:55:48,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1391 [2020-10-27 05:55:48,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:48,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:55:48,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:55:48,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:55:48,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:49,057 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:55:49,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:49,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:49,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:49,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:49,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:49,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:55:49,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:49,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:55:49,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:49,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:55:49,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:49,104 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 05:55:49,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890485348] [2020-10-27 05:55:49,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:49,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:55:49,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903951104] [2020-10-27 05:55:49,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:55:49,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:49,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:55:49,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:55:49,107 INFO L87 Difference]: Start difference. First operand 11663 states and 17682 transitions. Second operand 5 states. [2020-10-27 05:55:51,188 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 05:55:52,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:55:52,017 INFO L93 Difference]: Finished difference Result 33216 states and 50286 transitions. [2020-10-27 05:55:52,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:55:52,018 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-27 05:55:52,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:55:52,074 INFO L225 Difference]: With dead ends: 33216 [2020-10-27 05:55:52,074 INFO L226 Difference]: Without dead ends: 22098 [2020-10-27 05:55:52,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:55:52,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22098 states. [2020-10-27 05:55:54,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22098 to 22095. [2020-10-27 05:55:54,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22095 states. [2020-10-27 05:55:54,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22095 states to 22095 states and 33062 transitions. [2020-10-27 05:55:54,367 INFO L78 Accepts]: Start accepts. Automaton has 22095 states and 33062 transitions. Word has length 68 [2020-10-27 05:55:54,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:55:54,367 INFO L481 AbstractCegarLoop]: Abstraction has 22095 states and 33062 transitions. [2020-10-27 05:55:54,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:55:54,367 INFO L276 IsEmpty]: Start isEmpty. Operand 22095 states and 33062 transitions. [2020-10-27 05:55:54,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 05:55:54,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:55:54,411 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] [2020-10-27 05:55:54,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:55:54,412 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:55:54,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:55:54,412 INFO L82 PathProgramCache]: Analyzing trace with hash -479035685, now seen corresponding path program 1 times [2020-10-27 05:55:54,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:55:54,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914990146] [2020-10-27 05:55:54,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:55:54,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:54,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:54,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:54,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:54,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:55,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:56,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:56,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 05:55:56,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:55:56,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1815 [2020-10-27 05:55:56,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:56,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:55:56,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:55:56,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:55:56,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:56,664 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:55:56,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:55:56,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:55:56,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:55:56,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:55:56,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:55:56,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:55:56,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:55:56,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:55:56,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:55:56,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:55:56,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:55:56,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:55:56,699 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 05:55:56,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914990146] [2020-10-27 05:55:56,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:55:56,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:55:56,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408647494] [2020-10-27 05:55:56,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:55:56,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:55:56,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:55:56,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:55:56,701 INFO L87 Difference]: Start difference. First operand 22095 states and 33062 transitions. Second operand 5 states. [2020-10-27 05:55:57,193 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-27 05:56:00,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:56:00,099 INFO L93 Difference]: Finished difference Result 34618 states and 51618 transitions. [2020-10-27 05:56:00,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:56:00,099 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-27 05:56:00,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:56:00,164 INFO L225 Difference]: With dead ends: 34618 [2020-10-27 05:56:00,164 INFO L226 Difference]: Without dead ends: 23366 [2020-10-27 05:56:00,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:56:00,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23366 states. [2020-10-27 05:56:02,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23366 to 23359. [2020-10-27 05:56:02,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23359 states. [2020-10-27 05:56:02,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23359 states to 23359 states and 34418 transitions. [2020-10-27 05:56:02,672 INFO L78 Accepts]: Start accepts. Automaton has 23359 states and 34418 transitions. Word has length 69 [2020-10-27 05:56:02,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:56:02,672 INFO L481 AbstractCegarLoop]: Abstraction has 23359 states and 34418 transitions. [2020-10-27 05:56:02,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:56:02,672 INFO L276 IsEmpty]: Start isEmpty. Operand 23359 states and 34418 transitions. [2020-10-27 05:56:02,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 05:56:02,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:56:02,704 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] [2020-10-27 05:56:02,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:56:02,704 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:56:02,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:56:02,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1661664464, now seen corresponding path program 1 times [2020-10-27 05:56:02,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:56:02,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1969184323] [2020-10-27 05:56:02,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:56:02,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:02,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:02,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:02,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:03,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:05,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:05,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 05:56:05,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:56:05,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2970 [2020-10-27 05:56:05,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:05,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:56:05,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:56:05,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 05:56:05,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:06,140 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:56:06,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:56:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:06,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:06,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:06,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:56:06,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:56:06,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 05:56:06,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:06,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:56:06,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:56:06,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:56:06,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:06,208 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 05:56:06,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1969184323] [2020-10-27 05:56:06,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:56:06,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:56:06,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317480712] [2020-10-27 05:56:06,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:56:06,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:56:06,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:56:06,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:56:06,210 INFO L87 Difference]: Start difference. First operand 23359 states and 34418 transitions. Second operand 8 states. [2020-10-27 05:56:06,633 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 05:56:08,774 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-27 05:56:11,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:56:11,782 INFO L93 Difference]: Finished difference Result 56515 states and 84754 transitions. [2020-10-27 05:56:11,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 05:56:11,782 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-27 05:56:11,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:56:11,857 INFO L225 Difference]: With dead ends: 56515 [2020-10-27 05:56:11,858 INFO L226 Difference]: Without dead ends: 40610 [2020-10-27 05:56:11,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:56:11,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40610 states. [2020-10-27 05:56:14,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40610 to 25483. [2020-10-27 05:56:14,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25483 states. [2020-10-27 05:56:14,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25483 states to 25483 states and 37234 transitions. [2020-10-27 05:56:14,995 INFO L78 Accepts]: Start accepts. Automaton has 25483 states and 37234 transitions. Word has length 69 [2020-10-27 05:56:14,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:56:14,995 INFO L481 AbstractCegarLoop]: Abstraction has 25483 states and 37234 transitions. [2020-10-27 05:56:14,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:56:14,995 INFO L276 IsEmpty]: Start isEmpty. Operand 25483 states and 37234 transitions. [2020-10-27 05:56:15,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 05:56:15,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:56:15,027 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] [2020-10-27 05:56:15,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:56:15,028 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:56:15,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:56:15,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1711846827, now seen corresponding path program 1 times [2020-10-27 05:56:15,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:56:15,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672107077] [2020-10-27 05:56:15,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:56:15,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:15,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:15,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:15,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:15,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:15,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 05:56:15,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:56:15,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 731 [2020-10-27 05:56:15,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:15,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:56:15,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-27 05:56:15,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 05:56:15,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:16,151 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:56:16,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:56:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:16,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:16,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:16,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:56:16,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:56:16,169 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:56:16,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:16,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:56:16,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:56:16,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:56:16,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:16,183 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 05:56:16,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672107077] [2020-10-27 05:56:16,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:56:16,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:56:16,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560806240] [2020-10-27 05:56:16,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:56:16,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:56:16,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:56:16,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:56:16,187 INFO L87 Difference]: Start difference. First operand 25483 states and 37234 transitions. Second operand 4 states. [2020-10-27 05:56:16,567 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-27 05:56:20,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:56:20,954 INFO L93 Difference]: Finished difference Result 59825 states and 89686 transitions. [2020-10-27 05:56:20,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:56:20,954 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-27 05:56:20,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:56:21,020 INFO L225 Difference]: With dead ends: 59825 [2020-10-27 05:56:21,021 INFO L226 Difference]: Without dead ends: 40046 [2020-10-27 05:56:21,053 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 05:56:21,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40046 states. [2020-10-27 05:56:25,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40046 to 40043. [2020-10-27 05:56:25,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40043 states. [2020-10-27 05:56:25,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40043 states to 40043 states and 59178 transitions. [2020-10-27 05:56:25,290 INFO L78 Accepts]: Start accepts. Automaton has 40043 states and 59178 transitions. Word has length 69 [2020-10-27 05:56:25,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:56:25,291 INFO L481 AbstractCegarLoop]: Abstraction has 40043 states and 59178 transitions. [2020-10-27 05:56:25,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:56:25,291 INFO L276 IsEmpty]: Start isEmpty. Operand 40043 states and 59178 transitions. [2020-10-27 05:56:25,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:56:25,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:56:25,318 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] [2020-10-27 05:56:25,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:56:25,319 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:56:25,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:56:25,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1809749114, now seen corresponding path program 1 times [2020-10-27 05:56:25,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:56:25,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193765893] [2020-10-27 05:56:25,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:56:25,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:25,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:25,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:25,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:25,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:56:25,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:56:25,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 435 [2020-10-27 05:56:25,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:25,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:56:25,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-27 05:56:25,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 05:56:25,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:26,186 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:56:26,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:56:26,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:26,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:26,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:26,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:56:26,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:56:26,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:56:26,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:26,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:56:26,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:56:26,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:56:26,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:26,221 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 05:56:26,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193765893] [2020-10-27 05:56:26,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:56:26,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:56:26,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012100428] [2020-10-27 05:56:26,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:56:26,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:56:26,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:56:26,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:56:26,223 INFO L87 Difference]: Start difference. First operand 40043 states and 59178 transitions. Second operand 6 states. [2020-10-27 05:56:26,626 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-10-27 05:56:30,492 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-27 05:56:30,884 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-27 05:56:33,898 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:56:34,558 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-27 05:56:42,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:56:42,209 INFO L93 Difference]: Finished difference Result 166293 states and 253130 transitions. [2020-10-27 05:56:42,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:56:42,209 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-27 05:56:42,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:56:42,457 INFO L225 Difference]: With dead ends: 166293 [2020-10-27 05:56:42,457 INFO L226 Difference]: Without dead ends: 131954 [2020-10-27 05:56:42,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-10-27 05:56:42,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131954 states. [2020-10-27 05:56:50,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131954 to 71003. [2020-10-27 05:56:50,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71003 states. [2020-10-27 05:56:50,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71003 states to 71003 states and 105718 transitions. [2020-10-27 05:56:50,926 INFO L78 Accepts]: Start accepts. Automaton has 71003 states and 105718 transitions. Word has length 72 [2020-10-27 05:56:50,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:56:50,927 INFO L481 AbstractCegarLoop]: Abstraction has 71003 states and 105718 transitions. [2020-10-27 05:56:50,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:56:50,927 INFO L276 IsEmpty]: Start isEmpty. Operand 71003 states and 105718 transitions. [2020-10-27 05:56:50,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 05:56:50,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:56:50,960 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] [2020-10-27 05:56:50,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:56:50,961 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:56:50,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:56:50,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1808862592, now seen corresponding path program 1 times [2020-10-27 05:56:50,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:56:50,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456620222] [2020-10-27 05:56:50,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:56:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:50,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:51,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:51,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:51,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:51,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 05:56:51,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:56:51,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 624 [2020-10-27 05:56:51,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:51,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:56:51,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-27 05:56:51,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 05:56:51,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:52,035 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:56:52,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:56:52,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:52,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:52,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:52,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:56:52,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:56:52,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:56:52,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:52,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:56:52,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:56:52,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:56:52,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:52,079 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 05:56:52,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456620222] [2020-10-27 05:56:52,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:56:52,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:56:52,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779644856] [2020-10-27 05:56:52,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:56:52,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:56:52,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:56:52,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:56:52,082 INFO L87 Difference]: Start difference. First operand 71003 states and 105718 transitions. Second operand 5 states. [2020-10-27 05:56:52,480 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-27 05:56:56,325 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:57:03,275 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 204 [2020-10-27 05:57:09,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:57:09,464 INFO L93 Difference]: Finished difference Result 171916 states and 259172 transitions. [2020-10-27 05:57:09,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:57:09,465 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-27 05:57:09,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:57:09,692 INFO L225 Difference]: With dead ends: 171916 [2020-10-27 05:57:09,692 INFO L226 Difference]: Without dead ends: 133889 [2020-10-27 05:57:09,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:57:09,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133889 states. [2020-10-27 05:57:22,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133889 to 108371. [2020-10-27 05:57:22,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108371 states. [2020-10-27 05:57:22,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108371 states to 108371 states and 161438 transitions. [2020-10-27 05:57:22,616 INFO L78 Accepts]: Start accepts. Automaton has 108371 states and 161438 transitions. Word has length 73 [2020-10-27 05:57:22,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:57:22,616 INFO L481 AbstractCegarLoop]: Abstraction has 108371 states and 161438 transitions. [2020-10-27 05:57:22,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:57:22,616 INFO L276 IsEmpty]: Start isEmpty. Operand 108371 states and 161438 transitions. [2020-10-27 05:57:22,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 05:57:22,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:57:22,647 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] [2020-10-27 05:57:22,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:57:22,647 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:57:22,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:57:22,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1642611529, now seen corresponding path program 1 times [2020-10-27 05:57:22,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:57:22,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404139632] [2020-10-27 05:57:22,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:57:22,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:22,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:22,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:22,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:23,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:23,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 05:57:23,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:57:23,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 471 [2020-10-27 05:57:23,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:23,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:57:23,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-27 05:57:23,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 05:57:23,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:23,814 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:57:23,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:57:23,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:23,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:23,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:23,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:57:23,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:57:23,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:57:23,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:23,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:57:23,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:57:23,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:57:23,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:23,850 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 05:57:23,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404139632] [2020-10-27 05:57:23,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:57:23,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:57:23,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696132798] [2020-10-27 05:57:23,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:57:23,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:57:23,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:57:23,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:57:23,855 INFO L87 Difference]: Start difference. First operand 108371 states and 161438 transitions. Second operand 5 states. [2020-10-27 05:57:24,209 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-27 05:57:28,588 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-10-27 05:57:49,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:57:49,757 INFO L93 Difference]: Finished difference Result 313244 states and 473392 transitions. [2020-10-27 05:57:49,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:57:49,757 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-27 05:57:49,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:57:50,427 INFO L225 Difference]: With dead ends: 313244 [2020-10-27 05:57:50,427 INFO L226 Difference]: Without dead ends: 211105 [2020-10-27 05:57:50,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:57:50,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211105 states. [2020-10-27 05:58:10,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211105 to 159175. [2020-10-27 05:58:10,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159175 states. [2020-10-27 05:58:10,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159175 states to 159175 states and 237598 transitions. [2020-10-27 05:58:10,432 INFO L78 Accepts]: Start accepts. Automaton has 159175 states and 237598 transitions. Word has length 73 [2020-10-27 05:58:10,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:58:10,432 INFO L481 AbstractCegarLoop]: Abstraction has 159175 states and 237598 transitions. [2020-10-27 05:58:10,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:58:10,432 INFO L276 IsEmpty]: Start isEmpty. Operand 159175 states and 237598 transitions. [2020-10-27 05:58:10,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 05:58:10,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:58:10,863 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] [2020-10-27 05:58:10,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:58:10,863 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:58:10,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:58:10,864 INFO L82 PathProgramCache]: Analyzing trace with hash -217877790, now seen corresponding path program 1 times [2020-10-27 05:58:10,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:58:10,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502583755] [2020-10-27 05:58:10,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:58:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:10,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:11,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:11,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:11,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:11,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 05:58:11,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:58:11,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 631 [2020-10-27 05:58:11,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:11,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:58:11,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 05:58:11,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 05:58:11,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:12,223 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification that was a NOOP. DAG size: 196 [2020-10-27 05:58:12,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:58:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:12,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:12,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:12,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:58:12,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:58:12,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:58:12,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:12,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:58:12,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:58:12,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:58:12,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:12,256 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 05:58:12,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502583755] [2020-10-27 05:58:12,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:58:12,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:58:12,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291221537] [2020-10-27 05:58:12,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:58:12,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:58:12,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:58:12,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:58:12,258 INFO L87 Difference]: Start difference. First operand 159175 states and 237598 transitions. Second operand 5 states. [2020-10-27 05:58:12,706 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-10-27 05:58:16,825 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-27 05:58:27,008 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 207