/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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.6.1.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:07:53,547 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:07:53,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:07:53,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:07:53,592 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:07:53,594 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:07:53,596 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:07:53,598 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:07:53,601 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:07:53,602 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:07:53,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:07:53,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:07:53,605 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:07:53,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:07:53,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:07:53,610 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:07:53,611 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:07:53,612 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:07:53,614 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:07:53,617 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:07:53,619 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:07:53,620 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:07:53,622 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:07:53,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:07:53,627 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:07:53,627 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:07:53,627 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:07:53,629 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:07:53,629 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:07:53,630 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:07:53,631 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:07:53,632 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:07:53,633 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:07:53,634 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:07:53,635 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:07:53,636 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:07:53,637 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:07:53,637 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:07:53,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:07:53,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:07:53,639 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:07:53,644 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 [2020-10-28 19:07:53,695 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:07:53,696 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:07:53,701 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:07:53,701 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:07:53,701 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:07:53,702 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:07:53,702 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:07:53,702 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:07:53,702 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:07:53,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:07:53,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:07:53,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:07:53,705 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:07:53,705 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:07:53,705 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:07:53,705 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:07:53,706 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:07:53,706 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:07:53,706 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:07:53,731 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:07:53,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:07:53,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:07:53,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:07:53,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:07:53,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:07:53,733 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:07:53,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:07:53,734 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:07:53,734 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:07:53,734 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:07:54,144 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:07:54,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:07:54,173 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:07:54,175 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:07:54,175 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:07:54,176 INFO L432 ainManager$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.6.1.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2020-10-28 19:07:54,267 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3f32e06c4/4906b8790d074e0c97b9ebd043d187d5/FLAG4ff2fdf9b [2020-10-28 19:07:54,967 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:07:54,968 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2020-10-28 19:07:54,990 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3f32e06c4/4906b8790d074e0c97b9ebd043d187d5/FLAG4ff2fdf9b [2020-10-28 19:07:55,288 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3f32e06c4/4906b8790d074e0c97b9ebd043d187d5 [2020-10-28 19:07:55,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:07:55,298 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:07:55,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:07:55,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:07:55,306 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:07:55,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:07:55" (1/1) ... [2020-10-28 19:07:55,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64cfa140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:07:55, skipping insertion in model container [2020-10-28 19:07:55,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:07:55" (1/1) ... [2020-10-28 19:07:55,321 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:07:55,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:07:55,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:07:55,782 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:07:55,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:07:55,944 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:07:55,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:07:55 WrapperNode [2020-10-28 19:07:55,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:07:55,946 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:07:55,946 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:07:55,946 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:07:55,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:07:55" (1/1) ... [2020-10-28 19:07:55,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:07:55" (1/1) ... [2020-10-28 19:07:55,999 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:07:55" (1/1) ... [2020-10-28 19:07:56,003 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:07:55" (1/1) ... [2020-10-28 19:07:56,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:07:55" (1/1) ... [2020-10-28 19:07:56,086 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:07:55" (1/1) ... [2020-10-28 19:07:56,096 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:07:55" (1/1) ... [2020-10-28 19:07:56,110 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:07:56,111 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:07:56,111 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:07:56,111 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:07:56,112 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:07:55" (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 [2020-10-28 19:07:56,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:07:56,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:07:56,216 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:07:56,216 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:07:56,216 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:07:56,217 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:07:56,217 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:07:56,217 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:07:56,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:07:56,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:07:56,218 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:07:56,219 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:07:56,219 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:07:56,219 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:07:56,219 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:07:56,220 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:07:56,220 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:07:56,221 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:07:56,221 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 19:07:56,222 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 19:07:56,222 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-28 19:07:56,222 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:07:56,222 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:07:56,222 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:07:56,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:07:56,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:07:56,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:07:56,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:07:56,223 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:07:56,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:07:57,513 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:07:57,513 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:07:57,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:07:57 BoogieIcfgContainer [2020-10-28 19:07:57,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:07:57,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:07:57,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:07:57,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:07:57,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:07:55" (1/3) ... [2020-10-28 19:07:57,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4866e444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:07:57, skipping insertion in model container [2020-10-28 19:07:57,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:07:55" (2/3) ... [2020-10-28 19:07:57,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4866e444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:07:57, skipping insertion in model container [2020-10-28 19:07:57,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:07:57" (3/3) ... [2020-10-28 19:07:57,525 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.1.ufo.BOUNDED-12.pals.c.v+nlh-reducer.c [2020-10-28 19:07:57,537 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:07:57,542 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:07:57,556 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:07:57,585 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:07:57,586 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:07:57,586 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:07:57,586 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:07:57,586 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:07:57,586 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:07:57,586 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:07:57,586 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:07:57,610 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states. [2020-10-28 19:07:57,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-28 19:07:57,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:07:57,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:07:57,628 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:07:57,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:07:57,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1134591196, now seen corresponding path program 1 times [2020-10-28 19:07:57,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:07:57,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378177385] [2020-10-28 19:07:57,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:07:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:07:58,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:58,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:07:59,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:03,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:03,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-28 19:08:03,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 19:08:03,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 19:08:03,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:03,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:03,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:08:03,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-28 19:08:03,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 19:08:03,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 19:08:03,600 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 19:08:03,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:08:03,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:03,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:03,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:03,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:08:03,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:08:03,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 19:08:03,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:03,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:03,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:08:03,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:08:03,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:08:03,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:08:03,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378177385] [2020-10-28 19:08:03,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:08:03,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:08:03,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250350427] [2020-10-28 19:08:03,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:08:03,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:08:03,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:08:03,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:08:03,706 INFO L87 Difference]: Start difference. First operand 268 states. Second operand 4 states. [2020-10-28 19:08:04,209 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-28 19:08:05,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:08:05,697 INFO L93 Difference]: Finished difference Result 535 states and 879 transitions. [2020-10-28 19:08:05,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:08:05,699 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 102 [2020-10-28 19:08:05,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:08:05,715 INFO L225 Difference]: With dead ends: 535 [2020-10-28 19:08:05,715 INFO L226 Difference]: Without dead ends: 402 [2020-10-28 19:08:05,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:08:05,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-10-28 19:08:05,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 399. [2020-10-28 19:08:05,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2020-10-28 19:08:05,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 595 transitions. [2020-10-28 19:08:05,841 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 595 transitions. Word has length 102 [2020-10-28 19:08:05,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:08:05,842 INFO L481 AbstractCegarLoop]: Abstraction has 399 states and 595 transitions. [2020-10-28 19:08:05,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:08:05,843 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 595 transitions. [2020-10-28 19:08:05,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-28 19:08:05,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:08:05,852 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:08:05,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:08:05,853 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:08:05,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:08:05,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1164174768, now seen corresponding path program 1 times [2020-10-28 19:08:05,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:08:05,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843605748] [2020-10-28 19:08:05,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:08:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:05,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:06,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:07,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:07,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 19:08:07,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:08:07,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1644 [2020-10-28 19:08:07,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:07,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:07,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:08:07,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 104 [2020-10-28 19:08:07,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 19:08:07,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:07,973 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 19:08:07,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:08:07,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:07,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:07,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:07,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:08:07,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:08:07,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 19:08:07,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:07,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:07,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:08:07,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:08:07,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:08:08,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:08,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:08:08,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843605748] [2020-10-28 19:08:08,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:08:08,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:08:08,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818703684] [2020-10-28 19:08:08,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:08:08,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:08:08,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:08:08,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:08:08,030 INFO L87 Difference]: Start difference. First operand 399 states and 595 transitions. Second operand 5 states. [2020-10-28 19:08:09,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:08:09,340 INFO L93 Difference]: Finished difference Result 614 states and 934 transitions. [2020-10-28 19:08:09,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:08:09,341 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 103 [2020-10-28 19:08:09,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:08:09,346 INFO L225 Difference]: With dead ends: 614 [2020-10-28 19:08:09,347 INFO L226 Difference]: Without dead ends: 611 [2020-10-28 19:08:09,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:08:09,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2020-10-28 19:08:09,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 401. [2020-10-28 19:08:09,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2020-10-28 19:08:09,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 597 transitions. [2020-10-28 19:08:09,398 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 597 transitions. Word has length 103 [2020-10-28 19:08:09,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:08:09,399 INFO L481 AbstractCegarLoop]: Abstraction has 401 states and 597 transitions. [2020-10-28 19:08:09,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:08:09,400 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 597 transitions. [2020-10-28 19:08:09,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-28 19:08:09,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:08:09,407 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:08:09,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:08:09,407 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:08:09,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:08:09,413 INFO L82 PathProgramCache]: Analyzing trace with hash 291871472, now seen corresponding path program 1 times [2020-10-28 19:08:09,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:08:09,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098981581] [2020-10-28 19:08:09,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:08:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:09,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:09,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:10,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:10,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-28 19:08:10,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 19:08:10,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1373 [2020-10-28 19:08:10,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:10,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:10,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:08:10,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 19:08:10,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-28 19:08:10,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:08:11,309 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 19:08:11,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:08:11,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:11,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:11,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:11,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:08:11,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:08:11,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 19:08:11,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:11,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:11,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:08:11,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:08:11,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:08:11,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:11,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:08:11,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098981581] [2020-10-28 19:08:11,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:08:11,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:08:11,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114260267] [2020-10-28 19:08:11,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:08:11,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:08:11,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:08:11,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:08:11,393 INFO L87 Difference]: Start difference. First operand 401 states and 597 transitions. Second operand 5 states. [2020-10-28 19:08:11,859 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 213 [2020-10-28 19:08:12,975 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-28 19:08:13,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:08:13,795 INFO L93 Difference]: Finished difference Result 854 states and 1312 transitions. [2020-10-28 19:08:13,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 19:08:13,799 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 104 [2020-10-28 19:08:13,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:08:13,803 INFO L225 Difference]: With dead ends: 854 [2020-10-28 19:08:13,803 INFO L226 Difference]: Without dead ends: 621 [2020-10-28 19:08:13,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:08:13,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2020-10-28 19:08:13,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 618. [2020-10-28 19:08:13,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 618 states. [2020-10-28 19:08:13,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 940 transitions. [2020-10-28 19:08:13,855 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 940 transitions. Word has length 104 [2020-10-28 19:08:13,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:08:13,856 INFO L481 AbstractCegarLoop]: Abstraction has 618 states and 940 transitions. [2020-10-28 19:08:13,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:08:13,856 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 940 transitions. [2020-10-28 19:08:13,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 19:08:13,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:08:13,858 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:08:13,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:08:13,859 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:08:13,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:08:13,859 INFO L82 PathProgramCache]: Analyzing trace with hash 505318855, now seen corresponding path program 1 times [2020-10-28 19:08:13,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:08:13,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118021818] [2020-10-28 19:08:13,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:08:13,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:13,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:13,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:14,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:14,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:16,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:18,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:18,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 19:08:18,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:08:18,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 19:08:18,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:18,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:18,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:08:18,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-28 19:08:18,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 19:08:18,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-28 19:08:19,275 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 19:08:19,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:08:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:19,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:19,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:19,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:08:19,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:08:19,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 19:08:19,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:19,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:19,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:08:19,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:08:19,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:08:19,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:19,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:08:19,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118021818] [2020-10-28 19:08:19,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:08:19,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:08:19,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037317508] [2020-10-28 19:08:19,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:08:19,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:08:19,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:08:19,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:08:19,335 INFO L87 Difference]: Start difference. First operand 618 states and 940 transitions. Second operand 4 states. [2020-10-28 19:08:19,687 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-28 19:08:20,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:08:20,880 INFO L93 Difference]: Finished difference Result 1590 states and 2472 transitions. [2020-10-28 19:08:20,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:08:20,881 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-10-28 19:08:20,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:08:20,888 INFO L225 Difference]: With dead ends: 1590 [2020-10-28 19:08:20,888 INFO L226 Difference]: Without dead ends: 1110 [2020-10-28 19:08:20,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:08:20,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2020-10-28 19:08:20,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 1107. [2020-10-28 19:08:20,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1107 states. [2020-10-28 19:08:20,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1698 transitions. [2020-10-28 19:08:20,955 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1698 transitions. Word has length 105 [2020-10-28 19:08:20,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:08:20,956 INFO L481 AbstractCegarLoop]: Abstraction has 1107 states and 1698 transitions. [2020-10-28 19:08:20,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:08:20,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1698 transitions. [2020-10-28 19:08:20,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 19:08:20,957 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:08:20,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:08:20,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:08:20,958 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:08:20,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:08:20,959 INFO L82 PathProgramCache]: Analyzing trace with hash 781303493, now seen corresponding path program 1 times [2020-10-28 19:08:20,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:08:20,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034950694] [2020-10-28 19:08:20,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:08:20,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:21,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:21,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:21,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:21,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:22,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:25,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:25,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 19:08:25,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:08:25,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 19:08:25,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:25,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:25,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:08:25,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-28 19:08:25,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 19:08:25,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:26,494 WARN L193 SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 19:08:26,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:08:26,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:26,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:26,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:26,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:08:26,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:08:26,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 19:08:26,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:26,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:26,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:08:26,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:08:26,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:08:26,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:08:26,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034950694] [2020-10-28 19:08:26,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:08:26,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:08:26,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753141932] [2020-10-28 19:08:26,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:08:26,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:08:26,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:08:26,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:08:26,567 INFO L87 Difference]: Start difference. First operand 1107 states and 1698 transitions. Second operand 4 states. [2020-10-28 19:08:26,988 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-28 19:08:28,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:08:28,218 INFO L93 Difference]: Finished difference Result 2909 states and 4520 transitions. [2020-10-28 19:08:28,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:08:28,223 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-10-28 19:08:28,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:08:28,234 INFO L225 Difference]: With dead ends: 2909 [2020-10-28 19:08:28,234 INFO L226 Difference]: Without dead ends: 2020 [2020-10-28 19:08:28,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:08:28,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2020-10-28 19:08:28,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 2017. [2020-10-28 19:08:28,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2017 states. [2020-10-28 19:08:28,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 3096 transitions. [2020-10-28 19:08:28,346 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 3096 transitions. Word has length 105 [2020-10-28 19:08:28,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:08:28,348 INFO L481 AbstractCegarLoop]: Abstraction has 2017 states and 3096 transitions. [2020-10-28 19:08:28,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:08:28,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 3096 transitions. [2020-10-28 19:08:28,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 19:08:28,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:08:28,353 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:08:28,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:08:28,353 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:08:28,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:08:28,354 INFO L82 PathProgramCache]: Analyzing trace with hash -397891656, now seen corresponding path program 1 times [2020-10-28 19:08:28,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:08:28,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567599230] [2020-10-28 19:08:28,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:08:28,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:28,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:28,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:28,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:29,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:29,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:33,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:33,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 19:08:33,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:08:33,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 19:08:33,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:33,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:33,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:08:33,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 76 [2020-10-28 19:08:33,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 19:08:33,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:33,759 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 19:08:33,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:08:33,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:33,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:33,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:33,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:08:33,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:08:33,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 19:08:33,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:33,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:33,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:08:33,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:08:33,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:08:33,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:33,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:08:33,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567599230] [2020-10-28 19:08:33,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:08:33,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:08:33,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159650061] [2020-10-28 19:08:33,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:08:33,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:08:33,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:08:33,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:08:33,811 INFO L87 Difference]: Start difference. First operand 2017 states and 3096 transitions. Second operand 4 states. [2020-10-28 19:08:34,172 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-28 19:08:35,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:08:35,391 INFO L93 Difference]: Finished difference Result 5295 states and 8196 transitions. [2020-10-28 19:08:35,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:08:35,392 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-10-28 19:08:35,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:08:35,411 INFO L225 Difference]: With dead ends: 5295 [2020-10-28 19:08:35,411 INFO L226 Difference]: Without dead ends: 3680 [2020-10-28 19:08:35,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:08:35,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3680 states. [2020-10-28 19:08:35,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3680 to 3677. [2020-10-28 19:08:35,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3677 states. [2020-10-28 19:08:35,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3677 states to 3677 states and 5640 transitions. [2020-10-28 19:08:35,647 INFO L78 Accepts]: Start accepts. Automaton has 3677 states and 5640 transitions. Word has length 105 [2020-10-28 19:08:35,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:08:35,647 INFO L481 AbstractCegarLoop]: Abstraction has 3677 states and 5640 transitions. [2020-10-28 19:08:35,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:08:35,648 INFO L276 IsEmpty]: Start isEmpty. Operand 3677 states and 5640 transitions. [2020-10-28 19:08:35,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 19:08:35,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:08:35,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:08:35,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:08:35,651 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:08:35,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:08:35,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1882722695, now seen corresponding path program 1 times [2020-10-28 19:08:35,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:08:35,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132986609] [2020-10-28 19:08:35,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:08:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:35,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:35,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:35,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:36,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:37,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:40,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:40,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 19:08:40,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:08:40,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 19:08:40,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:40,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:40,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:08:40,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-28 19:08:40,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 19:08:40,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:41,082 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 19:08:41,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:08:41,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:41,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:41,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:41,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:08:41,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:08:41,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 19:08:41,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:41,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:41,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:08:41,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:08:41,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:08:41,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:08:41,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132986609] [2020-10-28 19:08:41,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:08:41,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:08:41,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823049270] [2020-10-28 19:08:41,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:08:41,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:08:41,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:08:41,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:08:41,131 INFO L87 Difference]: Start difference. First operand 3677 states and 5640 transitions. Second operand 4 states. [2020-10-28 19:08:41,513 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-28 19:08:42,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:08:42,879 INFO L93 Difference]: Finished difference Result 9931 states and 15268 transitions. [2020-10-28 19:08:42,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:08:42,880 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-10-28 19:08:42,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:08:42,913 INFO L225 Difference]: With dead ends: 9931 [2020-10-28 19:08:42,913 INFO L226 Difference]: Without dead ends: 6832 [2020-10-28 19:08:42,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:08:42,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6832 states. [2020-10-28 19:08:43,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6832 to 6829. [2020-10-28 19:08:43,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6829 states. [2020-10-28 19:08:43,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6829 states to 6829 states and 10384 transitions. [2020-10-28 19:08:43,279 INFO L78 Accepts]: Start accepts. Automaton has 6829 states and 10384 transitions. Word has length 105 [2020-10-28 19:08:43,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:08:43,280 INFO L481 AbstractCegarLoop]: Abstraction has 6829 states and 10384 transitions. [2020-10-28 19:08:43,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:08:43,280 INFO L276 IsEmpty]: Start isEmpty. Operand 6829 states and 10384 transitions. [2020-10-28 19:08:43,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 19:08:43,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:08:43,285 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:08:43,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:08:43,286 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:08:43,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:08:43,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1188280965, now seen corresponding path program 1 times [2020-10-28 19:08:43,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:08:43,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249305703] [2020-10-28 19:08:43,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:08:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:43,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:43,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:43,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:43,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:44,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:48,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:48,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 19:08:48,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:08:48,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 19:08:48,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:48,327 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:48,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:08:48,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-28 19:08:48,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 19:08:48,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:48,702 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 19:08:48,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:08:48,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:48,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:48,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:48,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:08:48,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:08:48,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 19:08:48,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:48,725 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:48,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:08:48,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:08:48,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:08:48,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:48,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:08:48,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249305703] [2020-10-28 19:08:48,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:08:48,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:08:48,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318747708] [2020-10-28 19:08:48,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:08:48,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:08:48,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:08:48,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:08:48,756 INFO L87 Difference]: Start difference. First operand 6829 states and 10384 transitions. Second operand 4 states. [2020-10-28 19:08:49,121 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-28 19:08:50,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:08:50,740 INFO L93 Difference]: Finished difference Result 19145 states and 29094 transitions. [2020-10-28 19:08:50,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:08:50,740 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-10-28 19:08:50,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:08:50,799 INFO L225 Difference]: With dead ends: 19145 [2020-10-28 19:08:50,799 INFO L226 Difference]: Without dead ends: 12822 [2020-10-28 19:08:50,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:08:50,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12822 states. [2020-10-28 19:08:51,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12822 to 12819. [2020-10-28 19:08:51,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12819 states. [2020-10-28 19:08:51,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12819 states to 12819 states and 19250 transitions. [2020-10-28 19:08:51,418 INFO L78 Accepts]: Start accepts. Automaton has 12819 states and 19250 transitions. Word has length 105 [2020-10-28 19:08:51,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:08:51,418 INFO L481 AbstractCegarLoop]: Abstraction has 12819 states and 19250 transitions. [2020-10-28 19:08:51,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:08:51,419 INFO L276 IsEmpty]: Start isEmpty. Operand 12819 states and 19250 transitions. [2020-10-28 19:08:51,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 19:08:51,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:08:51,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:08:51,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:08:51,428 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:08:51,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:08:51,428 INFO L82 PathProgramCache]: Analyzing trace with hash 60103175, now seen corresponding path program 1 times [2020-10-28 19:08:51,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:08:51,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591501419] [2020-10-28 19:08:51,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:08:51,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:51,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:51,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:51,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:51,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:53,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:56,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:56,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 19:08:56,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:08:56,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-28 19:08:56,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:56,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:56,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:08:56,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-28 19:08:56,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 19:08:56,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:56,854 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 19:08:56,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:08:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:08:56,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:08:56,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:08:56,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:08:56,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:08:56,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 19:08:56,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:08:56,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:08:56,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:08:56,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:08:56,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:08:56,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:08:56,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:08:56,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591501419] [2020-10-28 19:08:56,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:08:56,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:08:56,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842781346] [2020-10-28 19:08:56,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:08:56,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:08:56,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:08:56,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:08:56,895 INFO L87 Difference]: Start difference. First operand 12819 states and 19250 transitions. Second operand 4 states. [2020-10-28 19:08:57,271 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-28 19:08:58,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:08:58,943 INFO L93 Difference]: Finished difference Result 36129 states and 54244 transitions. [2020-10-28 19:08:58,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:08:58,944 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 105 [2020-10-28 19:08:58,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:08:59,003 INFO L225 Difference]: With dead ends: 36129 [2020-10-28 19:08:59,004 INFO L226 Difference]: Without dead ends: 23934 [2020-10-28 19:08:59,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:08:59,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23934 states. [2020-10-28 19:09:00,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23934 to 23931. [2020-10-28 19:09:00,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23931 states. [2020-10-28 19:09:00,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23931 states to 23931 states and 35584 transitions. [2020-10-28 19:09:00,375 INFO L78 Accepts]: Start accepts. Automaton has 23931 states and 35584 transitions. Word has length 105 [2020-10-28 19:09:00,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:09:00,376 INFO L481 AbstractCegarLoop]: Abstraction has 23931 states and 35584 transitions. [2020-10-28 19:09:00,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:09:00,376 INFO L276 IsEmpty]: Start isEmpty. Operand 23931 states and 35584 transitions. [2020-10-28 19:09:00,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 19:09:00,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:09:00,391 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:09:00,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 19:09:00,392 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:09:00,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:09:00,393 INFO L82 PathProgramCache]: Analyzing trace with hash -232567416, now seen corresponding path program 1 times [2020-10-28 19:09:00,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:09:00,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984696119] [2020-10-28 19:09:00,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:09:00,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:00,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:00,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:00,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:01,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:02,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:04,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:04,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 19:09:04,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:09:04,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3944 [2020-10-28 19:09:04,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:04,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:04,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:09:04,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:09:04,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-28 19:09:04,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:09:04,773 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 19:09:04,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:09:04,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:04,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:04,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:04,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:09:04,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:09:04,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 19:09:04,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:04,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:04,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:09:04,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:09:04,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:09:04,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:09:04,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:09:04,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984696119] [2020-10-28 19:09:04,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:09:04,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 19:09:04,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630291972] [2020-10-28 19:09:04,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:09:04,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:09:04,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:09:04,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:09:04,833 INFO L87 Difference]: Start difference. First operand 23931 states and 35584 transitions. Second operand 8 states. [2020-10-28 19:09:05,246 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-10-28 19:09:06,934 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-28 19:09:09,756 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-28 19:09:11,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:09:11,467 INFO L93 Difference]: Finished difference Result 109741 states and 162456 transitions. [2020-10-28 19:09:11,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 19:09:11,468 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 106 [2020-10-28 19:09:11,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:09:11,690 INFO L225 Difference]: With dead ends: 109741 [2020-10-28 19:09:11,690 INFO L226 Difference]: Without dead ends: 89450 [2020-10-28 19:09:11,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-28 19:09:11,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89450 states. [2020-10-28 19:09:14,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89450 to 36864. [2020-10-28 19:09:14,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36864 states. [2020-10-28 19:09:14,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36864 states to 36864 states and 54841 transitions. [2020-10-28 19:09:14,617 INFO L78 Accepts]: Start accepts. Automaton has 36864 states and 54841 transitions. Word has length 106 [2020-10-28 19:09:14,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:09:14,618 INFO L481 AbstractCegarLoop]: Abstraction has 36864 states and 54841 transitions. [2020-10-28 19:09:14,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:09:14,618 INFO L276 IsEmpty]: Start isEmpty. Operand 36864 states and 54841 transitions. [2020-10-28 19:09:14,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 19:09:14,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:09:14,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:09:14,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 19:09:14,644 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:09:14,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:09:14,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1586196166, now seen corresponding path program 1 times [2020-10-28 19:09:14,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:09:14,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875650445] [2020-10-28 19:09:14,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:09:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:14,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:14,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:14,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:15,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:15,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:19,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:19,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 19:09:19,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:09:19,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4739 [2020-10-28 19:09:19,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:19,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:19,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:09:19,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:09:19,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-28 19:09:19,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:09:19,938 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 19:09:19,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:09:19,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:19,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:19,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:19,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:09:19,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:09:19,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 19:09:19,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:19,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:19,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:09:19,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:09:19,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:09:19,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:09:20,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:09:20,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875650445] [2020-10-28 19:09:20,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:09:20,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 19:09:20,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116145216] [2020-10-28 19:09:20,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:09:20,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:09:20,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:09:20,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:09:20,037 INFO L87 Difference]: Start difference. First operand 36864 states and 54841 transitions. Second operand 8 states. [2020-10-28 19:09:20,420 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-28 19:09:22,233 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-28 19:09:26,388 WARN L193 SmtUtils]: Spent 358.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-28 19:09:32,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:09:32,731 INFO L93 Difference]: Finished difference Result 207126 states and 307542 transitions. [2020-10-28 19:09:32,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 19:09:32,732 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 106 [2020-10-28 19:09:32,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:09:33,202 INFO L225 Difference]: With dead ends: 207126 [2020-10-28 19:09:33,203 INFO L226 Difference]: Without dead ends: 174495 [2020-10-28 19:09:33,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 19:09:33,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174495 states. [2020-10-28 19:09:37,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174495 to 38687. [2020-10-28 19:09:37,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38687 states. [2020-10-28 19:09:37,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38687 states to 38687 states and 56892 transitions. [2020-10-28 19:09:37,278 INFO L78 Accepts]: Start accepts. Automaton has 38687 states and 56892 transitions. Word has length 106 [2020-10-28 19:09:37,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:09:37,279 INFO L481 AbstractCegarLoop]: Abstraction has 38687 states and 56892 transitions. [2020-10-28 19:09:37,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:09:37,279 INFO L276 IsEmpty]: Start isEmpty. Operand 38687 states and 56892 transitions. [2020-10-28 19:09:37,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 19:09:37,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:09:37,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:09:37,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 19:09:37,295 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:09:37,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:09:37,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1586356365, now seen corresponding path program 1 times [2020-10-28 19:09:37,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:09:37,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150354499] [2020-10-28 19:09:37,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:09:37,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:37,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:37,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:37,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:37,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:38,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:41,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:41,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 19:09:41,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:09:41,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4320 [2020-10-28 19:09:41,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:41,649 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:41,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:09:41,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:09:41,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-28 19:09:41,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:09:42,152 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 19:09:42,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:09:42,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:09:42,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:09:42,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:09:42,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:09:42,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:09:42,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 19:09:42,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:09:42,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:09:42,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:09:42,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:09:42,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:09:42,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:09:42,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:09:42,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150354499] [2020-10-28 19:09:42,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:09:42,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 19:09:42,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712645065] [2020-10-28 19:09:42,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:09:42,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:09:42,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:09:42,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:09:42,220 INFO L87 Difference]: Start difference. First operand 38687 states and 56892 transitions. Second operand 8 states. [2020-10-28 19:09:42,614 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-28 19:09:44,672 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-28 19:09:50,718 WARN L193 SmtUtils]: Spent 527.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-28 19:10:00,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:10:00,330 INFO L93 Difference]: Finished difference Result 235604 states and 346568 transitions. [2020-10-28 19:10:00,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 19:10:00,330 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 106 [2020-10-28 19:10:00,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:10:00,888 INFO L225 Difference]: With dead ends: 235604 [2020-10-28 19:10:00,888 INFO L226 Difference]: Without dead ends: 202468 [2020-10-28 19:10:00,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 19:10:01,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202468 states. [2020-10-28 19:10:05,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202468 to 40884. [2020-10-28 19:10:05,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40884 states. [2020-10-28 19:10:05,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40884 states to 40884 states and 59369 transitions. [2020-10-28 19:10:05,403 INFO L78 Accepts]: Start accepts. Automaton has 40884 states and 59369 transitions. Word has length 106 [2020-10-28 19:10:05,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:10:05,403 INFO L481 AbstractCegarLoop]: Abstraction has 40884 states and 59369 transitions. [2020-10-28 19:10:05,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:10:05,403 INFO L276 IsEmpty]: Start isEmpty. Operand 40884 states and 59369 transitions. [2020-10-28 19:10:05,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 19:10:05,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:10:05,419 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:10:05,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 19:10:05,419 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:10:05,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:10:05,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1134527004, now seen corresponding path program 1 times [2020-10-28 19:10:05,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:10:05,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782993821] [2020-10-28 19:10:05,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:10:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:05,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:05,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:05,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:06,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:06,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:09,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:09,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 19:10:09,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:10:09,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4363 [2020-10-28 19:10:09,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:09,816 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:09,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:10:09,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:10:09,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 19:10:09,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:10,314 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 19:10:10,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:10:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:10,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:10,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:10,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:10:10,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:10:10,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 19:10:10,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:10,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:10,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:10:10,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:10:10,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:10:10,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:10,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:10:10,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782993821] [2020-10-28 19:10:10,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:10:10,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 19:10:10,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26673908] [2020-10-28 19:10:10,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:10:10,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:10:10,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:10:10,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:10:10,382 INFO L87 Difference]: Start difference. First operand 40884 states and 59369 transitions. Second operand 8 states. [2020-10-28 19:10:10,774 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-28 19:10:13,076 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-28 19:10:20,671 WARN L193 SmtUtils]: Spent 507.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-28 19:10:34,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:10:34,673 INFO L93 Difference]: Finished difference Result 259242 states and 378068 transitions. [2020-10-28 19:10:34,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 19:10:34,674 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 106 [2020-10-28 19:10:34,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:10:35,218 INFO L225 Difference]: With dead ends: 259242 [2020-10-28 19:10:35,218 INFO L226 Difference]: Without dead ends: 225431 [2020-10-28 19:10:35,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 19:10:35,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225431 states. [2020-10-28 19:10:40,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225431 to 43367. [2020-10-28 19:10:40,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43367 states. [2020-10-28 19:10:40,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43367 states to 43367 states and 62112 transitions. [2020-10-28 19:10:40,750 INFO L78 Accepts]: Start accepts. Automaton has 43367 states and 62112 transitions. Word has length 106 [2020-10-28 19:10:40,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:10:40,751 INFO L481 AbstractCegarLoop]: Abstraction has 43367 states and 62112 transitions. [2020-10-28 19:10:40,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:10:40,751 INFO L276 IsEmpty]: Start isEmpty. Operand 43367 states and 62112 transitions. [2020-10-28 19:10:40,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 19:10:40,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:10:40,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:10:40,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 19:10:40,771 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:10:40,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:10:40,771 INFO L82 PathProgramCache]: Analyzing trace with hash 382469649, now seen corresponding path program 1 times [2020-10-28 19:10:40,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:10:40,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051242204] [2020-10-28 19:10:40,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:10:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:40,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:40,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:40,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:40,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:41,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:45,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:45,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 19:10:45,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:10:45,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4208 [2020-10-28 19:10:45,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:45,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:45,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:10:45,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:10:45,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-28 19:10:45,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:45,518 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 19:10:45,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:10:45,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:10:45,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:10:45,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:10:45,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:10:45,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:10:45,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 19:10:45,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:10:45,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:10:45,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:10:45,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:10:45,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:10:45,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:10:45,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:10:45,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051242204] [2020-10-28 19:10:45,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:10:45,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 19:10:45,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652268221] [2020-10-28 19:10:45,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:10:45,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:10:45,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:10:45,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:10:45,595 INFO L87 Difference]: Start difference. First operand 43367 states and 62112 transitions. Second operand 8 states. [2020-10-28 19:10:46,056 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-28 19:10:48,769 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-28 19:10:55,999 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-28 19:11:14,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:11:14,657 INFO L93 Difference]: Finished difference Result 258070 states and 373407 transitions. [2020-10-28 19:11:14,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 19:11:14,657 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 106 [2020-10-28 19:11:14,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:11:15,162 INFO L225 Difference]: With dead ends: 258070 [2020-10-28 19:11:15,162 INFO L226 Difference]: Without dead ends: 223494 [2020-10-28 19:11:15,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 19:11:15,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223494 states. [2020-10-28 19:11:21,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223494 to 45954. [2020-10-28 19:11:21,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45954 states. [2020-10-28 19:11:21,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45954 states to 45954 states and 64880 transitions. [2020-10-28 19:11:21,517 INFO L78 Accepts]: Start accepts. Automaton has 45954 states and 64880 transitions. Word has length 106 [2020-10-28 19:11:21,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:11:21,517 INFO L481 AbstractCegarLoop]: Abstraction has 45954 states and 64880 transitions. [2020-10-28 19:11:21,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 19:11:21,517 INFO L276 IsEmpty]: Start isEmpty. Operand 45954 states and 64880 transitions. [2020-10-28 19:11:21,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-28 19:11:21,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:11:21,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:11:21,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 19:11:21,658 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:11:21,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:11:21,659 INFO L82 PathProgramCache]: Analyzing trace with hash -203895550, now seen corresponding path program 1 times [2020-10-28 19:11:21,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:11:21,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34145220] [2020-10-28 19:11:21,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:11:21,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:11:21,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:21,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:21,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:21,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:21,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:25,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:11:25,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-28 19:11:25,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 19:11:25,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4307 [2020-10-28 19:11:25,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:11:25,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:11:25,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 19:11:25,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:11:25,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-28 19:11:25,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:11:26,516 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-28 19:11:26,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:11:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:11:26,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:11:26,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:11:26,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:11:26,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:11:26,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 19:11:26,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:11:26,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:11:26,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:11:26,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:11:26,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:11:26,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:11:26,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:11:26,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34145220] [2020-10-28 19:11:26,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:11:26,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 19:11:26,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863800787] [2020-10-28 19:11:26,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 19:11:26,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:11:26,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 19:11:26,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 19:11:26,600 INFO L87 Difference]: Start difference. First operand 45954 states and 64880 transitions. Second operand 8 states. [2020-10-28 19:11:26,990 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-28 19:11:30,186 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-28 19:11:30,974 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 214