/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:45:49,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:45:49,968 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:45:50,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:45:50,027 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:45:50,029 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:45:50,030 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:45:50,033 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:45:50,035 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:45:50,038 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:45:50,042 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:45:50,044 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:45:50,045 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:45:50,046 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:45:50,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:45:50,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:45:50,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:45:50,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:45:50,060 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:45:50,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:45:50,067 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:45:50,069 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:45:50,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:45:50,072 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:45:50,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:45:50,080 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:45:50,081 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:45:50,091 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:45:50,092 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:45:50,093 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:45:50,093 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:45:50,097 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:45:50,098 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:45:50,099 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:45:50,100 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:45:50,100 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:45:50,101 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:45:50,101 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:45:50,101 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:45:50,102 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:45:50,103 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:45:50,104 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 05:45:50,129 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:45:50,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:45:50,131 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:45:50,131 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:45:50,131 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:45:50,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:45:50,132 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:45:50,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:45:50,132 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:45:50,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:45:50,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:45:50,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:45:50,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:45:50,133 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:45:50,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:45:50,134 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:45:50,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:45:50,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:45:50,134 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:45:50,134 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:45:50,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:45:50,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:45:50,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:45:50,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:45:50,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:45:50,135 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:45:50,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:45:50,136 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:45:50,136 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:45:50,136 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:45:50,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:45:50,590 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:45:50,594 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:45:50,595 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:45:50,597 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:45:50,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-27 05:45:50,683 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b9f71ad69/b411c5ab927c4b78847f489e0d76b191/FLAG696745c76 [2020-10-27 05:45:51,432 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:45:51,433 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-27 05:45:51,448 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b9f71ad69/b411c5ab927c4b78847f489e0d76b191/FLAG696745c76 [2020-10-27 05:45:51,753 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b9f71ad69/b411c5ab927c4b78847f489e0d76b191 [2020-10-27 05:45:51,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:45:51,767 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:45:51,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:45:51,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:45:51,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:45:51,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:45:51" (1/1) ... [2020-10-27 05:45:51,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a684b51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:45:51, skipping insertion in model container [2020-10-27 05:45:51,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:45:51" (1/1) ... [2020-10-27 05:45:51,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:45:51,855 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:45:52,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:45:52,203 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:45:52,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:45:52,311 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:45:52,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:45:52 WrapperNode [2020-10-27 05:45:52,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:45:52,314 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:45:52,314 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:45:52,314 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:45:52,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:45:52" (1/1) ... [2020-10-27 05:45:52,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:45:52" (1/1) ... [2020-10-27 05:45:52,345 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:45:52" (1/1) ... [2020-10-27 05:45:52,345 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:45:52" (1/1) ... [2020-10-27 05:45:52,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:45:52" (1/1) ... [2020-10-27 05:45:52,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:45:52" (1/1) ... [2020-10-27 05:45:52,382 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:45:52" (1/1) ... [2020-10-27 05:45:52,387 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:45:52,388 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:45:52,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:45:52,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:45:52,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:45:52" (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 05:45:52,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:45:52,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:45:52,485 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:45:52,485 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:45:52,486 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:45:52,486 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:45:52,486 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:45:52,486 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:45:52,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:45:52,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:45:52,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:45:52,487 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:45:52,487 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:45:52,487 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:45:52,488 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:45:52,488 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:45:52,488 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:45:52,488 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:45:52,488 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:45:52,488 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 05:45:52,489 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:45:52,489 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:45:52,489 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:45:52,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:45:52,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:45:52,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:45:52,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:45:52,490 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:45:52,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:45:53,634 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:45:53,634 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:45:53,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:45:53 BoogieIcfgContainer [2020-10-27 05:45:53,637 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:45:53,638 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:45:53,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:45:53,642 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:45:53,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:45:51" (1/3) ... [2020-10-27 05:45:53,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2db13e12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:45:53, skipping insertion in model container [2020-10-27 05:45:53,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:45:52" (2/3) ... [2020-10-27 05:45:53,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2db13e12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:45:53, skipping insertion in model container [2020-10-27 05:45:53,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:45:53" (3/3) ... [2020-10-27 05:45:53,646 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-27 05:45:53,657 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:45:53,663 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:45:53,677 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:45:53,706 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:45:53,707 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:45:53,707 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:45:53,707 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:45:53,707 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:45:53,707 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:45:53,708 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:45:53,708 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:45:53,729 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states. [2020-10-27 05:45:53,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 05:45:53,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:45:53,740 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 05:45:53,740 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:45:53,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:45:53,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1110750841, now seen corresponding path program 1 times [2020-10-27 05:45:53,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:45:53,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407888459] [2020-10-27 05:45:53,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:45:54,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:54,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:54,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:54,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:54,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:55,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:56,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:59,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:59,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 05:45:59,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:45:59,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-27 05:45:59,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:59,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:45:59,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 05:45:59,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:45:59,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:45:59,898 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:45:59,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:45:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:45:59,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:45:59,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:45:59,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:45:59,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:45:59,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 05:45:59,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:45:59,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:45:59,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:45:59,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:45:59,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:45:59,992 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 05:45:59,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407888459] [2020-10-27 05:45:59,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:45:59,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:45:59,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203109662] [2020-10-27 05:46:00,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:46:00,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:46:00,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:46:00,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:46:00,033 INFO L87 Difference]: Start difference. First operand 145 states. Second operand 8 states. [2020-10-27 05:46:00,796 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:46:02,168 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:46:02,454 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:46:02,734 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 05:46:02,982 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 05:46:03,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:46:03,046 INFO L93 Difference]: Finished difference Result 763 states and 1215 transitions. [2020-10-27 05:46:03,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:46:03,048 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2020-10-27 05:46:03,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:46:03,069 INFO L225 Difference]: With dead ends: 763 [2020-10-27 05:46:03,069 INFO L226 Difference]: Without dead ends: 633 [2020-10-27 05:46:03,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:46:03,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2020-10-27 05:46:03,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 234. [2020-10-27 05:46:03,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-27 05:46:03,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 349 transitions. [2020-10-27 05:46:03,168 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 349 transitions. Word has length 65 [2020-10-27 05:46:03,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:46:03,169 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 349 transitions. [2020-10-27 05:46:03,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:46:03,169 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 349 transitions. [2020-10-27 05:46:03,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 05:46:03,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:46:03,173 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] [2020-10-27 05:46:03,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:46:03,174 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:46:03,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:46:03,175 INFO L82 PathProgramCache]: Analyzing trace with hash -501272047, now seen corresponding path program 1 times [2020-10-27 05:46:03,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:46:03,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977953149] [2020-10-27 05:46:03,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:46:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:46:03,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:03,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:03,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:03,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:03,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:04,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:07,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:46:07,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 05:46:07,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:46:07,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4404 [2020-10-27 05:46:07,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:46:07,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:46:07,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 05:46:07,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 05:46:07,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:46:07,895 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:46:07,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:46:07,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:46:07,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:07,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:46:07,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:46:07,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:46:07,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:46:07,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:46:07,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:46:07,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:46:07,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:46:07,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:46:07,948 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 05:46:07,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977953149] [2020-10-27 05:46:07,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:46:07,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:46:07,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004534165] [2020-10-27 05:46:07,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:46:07,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:46:07,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:46:07,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:46:07,956 INFO L87 Difference]: Start difference. First operand 234 states and 349 transitions. Second operand 4 states. [2020-10-27 05:46:08,185 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:46:09,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:46:09,155 INFO L93 Difference]: Finished difference Result 592 states and 917 transitions. [2020-10-27 05:46:09,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:46:09,158 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-27 05:46:09,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:46:09,165 INFO L225 Difference]: With dead ends: 592 [2020-10-27 05:46:09,165 INFO L226 Difference]: Without dead ends: 397 [2020-10-27 05:46:09,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:46:09,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-10-27 05:46:09,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 394. [2020-10-27 05:46:09,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-10-27 05:46:09,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 603 transitions. [2020-10-27 05:46:09,252 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 603 transitions. Word has length 66 [2020-10-27 05:46:09,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:46:09,252 INFO L481 AbstractCegarLoop]: Abstraction has 394 states and 603 transitions. [2020-10-27 05:46:09,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:46:09,252 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 603 transitions. [2020-10-27 05:46:09,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 05:46:09,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:46:09,260 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 05:46:09,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:46:09,260 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:46:09,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:46:09,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1651203884, now seen corresponding path program 1 times [2020-10-27 05:46:09,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:46:09,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490583191] [2020-10-27 05:46:09,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:46:09,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:46:09,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:09,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:09,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:09,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:10,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:11,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:46:11,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 05:46:11,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:46:11,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1990 [2020-10-27 05:46:11,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:46:11,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:46:11,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 05:46:11,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 05:46:11,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:46:11,532 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:46:11,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:46:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:46:11,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:11,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:46:11,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:46:11,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:46:11,556 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:46:11,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:46:11,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:46:11,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:46:11,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:46:11,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:46:11,576 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 05:46:11,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490583191] [2020-10-27 05:46:11,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:46:11,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:46:11,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277128081] [2020-10-27 05:46:11,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:46:11,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:46:11,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:46:11,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:46:11,581 INFO L87 Difference]: Start difference. First operand 394 states and 603 transitions. Second operand 4 states. [2020-10-27 05:46:11,815 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:46:12,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:46:12,660 INFO L93 Difference]: Finished difference Result 1040 states and 1627 transitions. [2020-10-27 05:46:12,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:46:12,661 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-27 05:46:12,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:46:12,667 INFO L225 Difference]: With dead ends: 1040 [2020-10-27 05:46:12,667 INFO L226 Difference]: Without dead ends: 685 [2020-10-27 05:46:12,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:46:12,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2020-10-27 05:46:12,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 682. [2020-10-27 05:46:12,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2020-10-27 05:46:12,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1057 transitions. [2020-10-27 05:46:12,720 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1057 transitions. Word has length 67 [2020-10-27 05:46:12,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:46:12,720 INFO L481 AbstractCegarLoop]: Abstraction has 682 states and 1057 transitions. [2020-10-27 05:46:12,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:46:12,721 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1057 transitions. [2020-10-27 05:46:12,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:46:12,723 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:46:12,723 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 05:46:12,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:46:12,723 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:46:12,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:46:12,724 INFO L82 PathProgramCache]: Analyzing trace with hash -894779684, now seen corresponding path program 1 times [2020-10-27 05:46:12,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:46:12,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436775568] [2020-10-27 05:46:12,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:46:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:46:12,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:12,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:12,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:13,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:13,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:46:13,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:46:13,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:46:13,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 940 [2020-10-27 05:46:13,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:46:13,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:46:13,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 05:46:13,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 05:46:13,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:46:13,927 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:46:13,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:46:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:46:13,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:13,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:46:13,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:46:13,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:46:13,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:46:13,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:46:13,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:46:13,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:46:13,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:46:13,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:46:13,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:46:13,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436775568] [2020-10-27 05:46:13,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:46:13,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:46:13,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211155128] [2020-10-27 05:46:13,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:46:13,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:46:13,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:46:13,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:46:13,981 INFO L87 Difference]: Start difference. First operand 682 states and 1057 transitions. Second operand 4 states. [2020-10-27 05:46:14,239 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:46:15,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:46:15,024 INFO L93 Difference]: Finished difference Result 1840 states and 2885 transitions. [2020-10-27 05:46:15,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:46:15,024 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-27 05:46:15,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:46:15,032 INFO L225 Difference]: With dead ends: 1840 [2020-10-27 05:46:15,032 INFO L226 Difference]: Without dead ends: 1197 [2020-10-27 05:46:15,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:46:15,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2020-10-27 05:46:15,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 1194. [2020-10-27 05:46:15,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1194 states. [2020-10-27 05:46:15,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 1857 transitions. [2020-10-27 05:46:15,108 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 1857 transitions. Word has length 68 [2020-10-27 05:46:15,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:46:15,109 INFO L481 AbstractCegarLoop]: Abstraction has 1194 states and 1857 transitions. [2020-10-27 05:46:15,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:46:15,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 1857 transitions. [2020-10-27 05:46:15,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 05:46:15,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:46:15,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:46:15,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:46:15,111 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:46:15,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:46:15,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1881615657, now seen corresponding path program 1 times [2020-10-27 05:46:15,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:46:15,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564474181] [2020-10-27 05:46:15,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:46:15,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:46:15,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:15,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:15,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:15,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:46:15,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 05:46:15,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:46:15,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 565 [2020-10-27 05:46:15,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:46:15,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:46:15,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-27 05:46:15,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 05:46:15,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:46:15,981 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:46:15,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:46:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:46:15,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:16,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:46:16,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:46:16,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:46:16,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 05:46:16,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:46:16,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:46:16,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:46:16,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:46:16,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:46:16,045 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 05:46:16,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564474181] [2020-10-27 05:46:16,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:46:16,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:46:16,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165457882] [2020-10-27 05:46:16,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:46:16,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:46:16,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:46:16,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:46:16,048 INFO L87 Difference]: Start difference. First operand 1194 states and 1857 transitions. Second operand 4 states. [2020-10-27 05:46:16,321 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:46:17,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:46:17,169 INFO L93 Difference]: Finished difference Result 3248 states and 5077 transitions. [2020-10-27 05:46:17,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:46:17,170 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-27 05:46:17,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:46:17,183 INFO L225 Difference]: With dead ends: 3248 [2020-10-27 05:46:17,183 INFO L226 Difference]: Without dead ends: 2093 [2020-10-27 05:46:17,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:46:17,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2020-10-27 05:46:17,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 2090. [2020-10-27 05:46:17,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2090 states. [2020-10-27 05:46:17,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 3241 transitions. [2020-10-27 05:46:17,329 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 3241 transitions. Word has length 69 [2020-10-27 05:46:17,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:46:17,329 INFO L481 AbstractCegarLoop]: Abstraction has 2090 states and 3241 transitions. [2020-10-27 05:46:17,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:46:17,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 3241 transitions. [2020-10-27 05:46:17,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 05:46:17,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:46:17,335 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] [2020-10-27 05:46:17,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:46:17,335 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:46:17,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:46:17,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1716669253, now seen corresponding path program 1 times [2020-10-27 05:46:17,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:46:17,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018229506] [2020-10-27 05:46:17,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:46:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:46:17,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:17,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:17,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:46:17,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 05:46:17,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:46:17,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 320 [2020-10-27 05:46:17,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:46:17,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:46:17,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 05:46:17,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 05:46:17,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:46:17,911 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:46:17,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:46:17,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:46:17,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:17,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:46:17,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:46:17,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:46:17,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:46:17,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:46:17,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:46:17,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:46:17,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:46:17,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 05:46:17,954 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 05:46:17,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018229506] [2020-10-27 05:46:17,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:46:17,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:46:17,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002665761] [2020-10-27 05:46:17,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:46:17,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:46:17,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:46:17,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:46:17,959 INFO L87 Difference]: Start difference. First operand 2090 states and 3241 transitions. Second operand 4 states. [2020-10-27 05:46:18,224 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:46:19,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:46:19,037 INFO L93 Difference]: Finished difference Result 5680 states and 8813 transitions. [2020-10-27 05:46:19,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:46:19,038 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-27 05:46:19,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:46:19,059 INFO L225 Difference]: With dead ends: 5680 [2020-10-27 05:46:19,059 INFO L226 Difference]: Without dead ends: 3629 [2020-10-27 05:46:19,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:46:19,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3629 states. [2020-10-27 05:46:19,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3629 to 3626. [2020-10-27 05:46:19,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3626 states. [2020-10-27 05:46:19,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 5577 transitions. [2020-10-27 05:46:19,308 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 5577 transitions. Word has length 70 [2020-10-27 05:46:19,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:46:19,309 INFO L481 AbstractCegarLoop]: Abstraction has 3626 states and 5577 transitions. [2020-10-27 05:46:19,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:46:19,309 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 5577 transitions. [2020-10-27 05:46:19,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:46:19,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:46:19,310 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] [2020-10-27 05:46:19,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:46:19,310 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:46:19,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:46:19,311 INFO L82 PathProgramCache]: Analyzing trace with hash 2036889234, now seen corresponding path program 1 times [2020-10-27 05:46:19,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:46:19,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062504243] [2020-10-27 05:46:19,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:46:19,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:46:19,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:19,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:20,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:46:20,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:46:20,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:46:20,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 924 [2020-10-27 05:46:20,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:46:20,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:46:20,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:46:20,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 05:46:20,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:46:20,579 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:46:20,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:46:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:46:20,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:20,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:46:20,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:46:20,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:46:20,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:46:20,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:46:20,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:46:20,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:46:20,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:46:20,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:46:20,676 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 05:46:20,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062504243] [2020-10-27 05:46:20,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:46:20,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:46:20,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337963588] [2020-10-27 05:46:20,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:46:20,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:46:20,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:46:20,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:46:20,679 INFO L87 Difference]: Start difference. First operand 3626 states and 5577 transitions. Second operand 8 states. [2020-10-27 05:46:21,548 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 05:46:21,793 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 05:46:22,041 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 05:46:22,268 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:46:22,501 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:46:24,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:46:24,294 INFO L93 Difference]: Finished difference Result 18841 states and 28787 transitions. [2020-10-27 05:46:24,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:46:24,295 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-10-27 05:46:24,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:46:24,379 INFO L225 Difference]: With dead ends: 18841 [2020-10-27 05:46:24,380 INFO L226 Difference]: Without dead ends: 15254 [2020-10-27 05:46:24,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:46:24,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15254 states. [2020-10-27 05:46:25,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15254 to 15242. [2020-10-27 05:46:25,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15242 states. [2020-10-27 05:46:25,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15242 states to 15242 states and 23177 transitions. [2020-10-27 05:46:25,662 INFO L78 Accepts]: Start accepts. Automaton has 15242 states and 23177 transitions. Word has length 71 [2020-10-27 05:46:25,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:46:25,662 INFO L481 AbstractCegarLoop]: Abstraction has 15242 states and 23177 transitions. [2020-10-27 05:46:25,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:46:25,665 INFO L276 IsEmpty]: Start isEmpty. Operand 15242 states and 23177 transitions. [2020-10-27 05:46:25,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 05:46:25,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:46:25,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:46:25,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:46:25,666 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:46:25,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:46:25,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1230849636, now seen corresponding path program 1 times [2020-10-27 05:46:25,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:46:25,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890367461] [2020-10-27 05:46:25,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:46:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:46:25,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:25,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:46:25,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 05:46:25,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:46:25,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-27 05:46:25,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:46:25,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:46:25,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-27 05:46:25,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 05:46:25,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:46:26,152 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:46:26,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:46:26,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:46:26,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:26,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:46:26,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:46:26,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:46:26,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:46:26,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:46:26,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:46:26,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:46:26,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:46:26,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:46:26,203 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 05:46:26,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890367461] [2020-10-27 05:46:26,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:46:26,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:46:26,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991001876] [2020-10-27 05:46:26,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:46:26,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:46:26,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:46:26,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:46:26,206 INFO L87 Difference]: Start difference. First operand 15242 states and 23177 transitions. Second operand 5 states. [2020-10-27 05:46:29,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:46:29,192 INFO L93 Difference]: Finished difference Result 31085 states and 46955 transitions. [2020-10-27 05:46:29,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:46:29,192 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-27 05:46:29,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:46:29,278 INFO L225 Difference]: With dead ends: 31085 [2020-10-27 05:46:29,278 INFO L226 Difference]: Without dead ends: 31082 [2020-10-27 05:46:29,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:46:29,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31082 states. [2020-10-27 05:46:30,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31082 to 15882. [2020-10-27 05:46:30,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15882 states. [2020-10-27 05:46:30,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15882 states to 15882 states and 23817 transitions. [2020-10-27 05:46:30,665 INFO L78 Accepts]: Start accepts. Automaton has 15882 states and 23817 transitions. Word has length 73 [2020-10-27 05:46:30,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:46:30,666 INFO L481 AbstractCegarLoop]: Abstraction has 15882 states and 23817 transitions. [2020-10-27 05:46:30,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:46:30,666 INFO L276 IsEmpty]: Start isEmpty. Operand 15882 states and 23817 transitions. [2020-10-27 05:46:30,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 05:46:30,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:46:30,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:46:30,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:46:30,669 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:46:30,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:46:30,669 INFO L82 PathProgramCache]: Analyzing trace with hash -200449353, now seen corresponding path program 1 times [2020-10-27 05:46:30,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:46:30,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856467489] [2020-10-27 05:46:30,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:46:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:46:30,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:30,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:46:30,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 05:46:30,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:46:30,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-27 05:46:30,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:46:30,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:46:30,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:46:30,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 05:46:30,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:46:31,094 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:46:31,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:46:31,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:46:31,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:31,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:46:31,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:46:31,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:46:31,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:46:31,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:46:31,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:46:31,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:46:31,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:46:31,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:46:31,139 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 05:46:31,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856467489] [2020-10-27 05:46:31,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:46:31,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:46:31,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610991568] [2020-10-27 05:46:31,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:46:31,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:46:31,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:46:31,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:46:31,142 INFO L87 Difference]: Start difference. First operand 15882 states and 23817 transitions. Second operand 4 states. [2020-10-27 05:46:31,409 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 05:46:33,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:46:33,170 INFO L93 Difference]: Finished difference Result 39042 states and 58575 transitions. [2020-10-27 05:46:33,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:46:33,171 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-10-27 05:46:33,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:46:33,229 INFO L225 Difference]: With dead ends: 39042 [2020-10-27 05:46:33,229 INFO L226 Difference]: Without dead ends: 23199 [2020-10-27 05:46:33,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:46:33,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23199 states. [2020-10-27 05:46:34,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23199 to 23196. [2020-10-27 05:46:34,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23196 states. [2020-10-27 05:46:34,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23196 states to 23196 states and 34651 transitions. [2020-10-27 05:46:34,809 INFO L78 Accepts]: Start accepts. Automaton has 23196 states and 34651 transitions. Word has length 74 [2020-10-27 05:46:34,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:46:34,809 INFO L481 AbstractCegarLoop]: Abstraction has 23196 states and 34651 transitions. [2020-10-27 05:46:34,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:46:34,809 INFO L276 IsEmpty]: Start isEmpty. Operand 23196 states and 34651 transitions. [2020-10-27 05:46:34,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 05:46:34,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:46:34,823 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:46:34,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:46:34,824 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:46:34,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:46:34,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1804316187, now seen corresponding path program 1 times [2020-10-27 05:46:34,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:46:34,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272158178] [2020-10-27 05:46:34,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:46:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:46:34,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:35,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:35,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:36,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:46:36,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 05:46:36,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:46:36,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1814 [2020-10-27 05:46:36,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:46:36,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:46:36,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:46:36,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 05:46:36,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:46:37,396 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:46:37,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:46:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:46:37,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:46:37,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:46:37,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:46:37,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:46:37,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 05:46:37,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:46:37,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:46:37,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:46:37,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:46:37,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:46:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:46:37,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272158178] [2020-10-27 05:46:37,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:46:37,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:46:37,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110095506] [2020-10-27 05:46:37,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:46:37,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:46:37,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:46:37,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:46:37,519 INFO L87 Difference]: Start difference. First operand 23196 states and 34651 transitions. Second operand 11 states. [2020-10-27 05:46:37,856 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:46:43,658 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:46:44,057 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 05:46:44,504 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:46:45,058 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 05:46:55,974 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:46:56,612 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 184 [2020-10-27 05:47:00,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:47:00,841 INFO L93 Difference]: Finished difference Result 274148 states and 405613 transitions. [2020-10-27 05:47:00,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-27 05:47:00,842 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 99 [2020-10-27 05:47:00,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:47:01,765 INFO L225 Difference]: With dead ends: 274148 [2020-10-27 05:47:01,765 INFO L226 Difference]: Without dead ends: 250993 [2020-10-27 05:47:01,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=660, Invalid=2762, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 05:47:02,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250993 states. [2020-10-27 05:47:08,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250993 to 62940. [2020-10-27 05:47:08,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62940 states. [2020-10-27 05:47:08,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62940 states to 62940 states and 92695 transitions. [2020-10-27 05:47:08,684 INFO L78 Accepts]: Start accepts. Automaton has 62940 states and 92695 transitions. Word has length 99 [2020-10-27 05:47:08,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:47:08,685 INFO L481 AbstractCegarLoop]: Abstraction has 62940 states and 92695 transitions. [2020-10-27 05:47:08,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:47:08,685 INFO L276 IsEmpty]: Start isEmpty. Operand 62940 states and 92695 transitions. [2020-10-27 05:47:08,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 05:47:08,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:47:08,717 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:47:08,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:47:08,718 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:47:08,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:47:08,718 INFO L82 PathProgramCache]: Analyzing trace with hash -117674894, now seen corresponding path program 1 times [2020-10-27 05:47:08,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:47:08,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952106035] [2020-10-27 05:47:08,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:47:08,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:47:08,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:47:09,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:47:09,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:47:09,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 05:47:09,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:47:09,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 790 [2020-10-27 05:47:09,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:47:09,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:47:09,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:47:09,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:47:09,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:47:09,825 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:47:09,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:47:09,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:47:09,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:47:09,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:47:09,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:47:09,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:47:09,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 05:47:09,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:47:09,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:47:09,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:47:09,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:47:09,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:47:09,909 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-27 05:47:09,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952106035] [2020-10-27 05:47:09,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:47:09,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:47:09,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933048587] [2020-10-27 05:47:09,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:47:09,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:47:09,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:47:09,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:47:09,915 INFO L87 Difference]: Start difference. First operand 62940 states and 92695 transitions. Second operand 6 states. [2020-10-27 05:47:10,197 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:47:12,162 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 05:47:20,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:47:20,690 INFO L93 Difference]: Finished difference Result 188738 states and 278003 transitions. [2020-10-27 05:47:20,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:47:20,691 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-10-27 05:47:20,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:47:21,083 INFO L225 Difference]: With dead ends: 188738 [2020-10-27 05:47:21,084 INFO L226 Difference]: Without dead ends: 125839 [2020-10-27 05:47:21,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:47:21,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125839 states. [2020-10-27 05:47:31,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125839 to 125836. [2020-10-27 05:47:31,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125836 states. [2020-10-27 05:47:31,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125836 states to 125836 states and 184243 transitions. [2020-10-27 05:47:31,822 INFO L78 Accepts]: Start accepts. Automaton has 125836 states and 184243 transitions. Word has length 99 [2020-10-27 05:47:31,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:47:31,823 INFO L481 AbstractCegarLoop]: Abstraction has 125836 states and 184243 transitions. [2020-10-27 05:47:31,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:47:31,823 INFO L276 IsEmpty]: Start isEmpty. Operand 125836 states and 184243 transitions. [2020-10-27 05:47:31,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-27 05:47:31,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:47:31,860 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:47:31,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:47:31,861 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:47:31,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:47:31,862 INFO L82 PathProgramCache]: Analyzing trace with hash -2002540649, now seen corresponding path program 1 times [2020-10-27 05:47:31,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:47:31,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241369019] [2020-10-27 05:47:31,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:47:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:47:31,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:47:32,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:47:32,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:47:34,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:47:34,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 05:47:34,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:47:34,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2377 [2020-10-27 05:47:34,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:47:34,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:47:34,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:47:34,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-27 05:47:34,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:47:34,832 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:47:34,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:47:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:47:34,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:47:34,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:47:34,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:47:34,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:47:34,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 05:47:34,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:47:34,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:47:34,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:47:34,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:47:34,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:47:34,925 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:47:34,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241369019] [2020-10-27 05:47:34,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:47:34,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:47:34,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88997232] [2020-10-27 05:47:34,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:47:34,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:47:34,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:47:34,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:47:34,932 INFO L87 Difference]: Start difference. First operand 125836 states and 184243 transitions. Second operand 11 states. [2020-10-27 05:47:35,229 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:47:41,880 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:47:42,254 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 05:47:43,020 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:47:43,713 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 05:48:26,779 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:48:28,403 WARN L193 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 184 [2020-10-27 05:48:41,476 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19