/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:55:06,199 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:55:06,203 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:55:06,257 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:55:06,258 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:55:06,266 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:55:06,268 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:55:06,272 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:55:06,275 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:55:06,281 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:55:06,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:55:06,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:55:06,285 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:55:06,288 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:55:06,290 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:55:06,292 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:55:06,293 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:55:06,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:55:06,303 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:55:06,311 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:55:06,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:55:06,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:55:06,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:55:06,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:55:06,328 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:55:06,329 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:55:06,329 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:55:06,330 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:55:06,334 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:55:06,335 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:55:06,335 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:55:06,336 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:55:06,337 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:55:06,338 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:55:06,339 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:55:06,339 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:55:06,340 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:55:06,340 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:55:06,340 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:55:06,341 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:55:06,342 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:55:06,343 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 13:55:06,370 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:55:06,370 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:55:06,372 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:55:06,372 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:55:06,372 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:55:06,373 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:55:06,373 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:55:06,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:55:06,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:55:06,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:55:06,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:55:06,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:55:06,374 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:55:06,374 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:55:06,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:55:06,375 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:55:06,375 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:55:06,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:55:06,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:55:06,375 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:55:06,376 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:55:06,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:55:06,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:55:06,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:55:06,376 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:55:06,376 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:55:06,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:55:06,377 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:55:06,377 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:55:06,377 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:55:06,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:55:06,805 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:55:06,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:55:06,810 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:55:06,811 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:55:06,813 INFO L432 ainManager$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.6.2.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-29 13:55:06,902 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff81de3cc/22a86782f05e4cb4ad3f2d35e3ad1076/FLAGfc6a6a11d [2020-10-29 13:55:07,710 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:55:07,710 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-29 13:55:07,723 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff81de3cc/22a86782f05e4cb4ad3f2d35e3ad1076/FLAGfc6a6a11d [2020-10-29 13:55:07,952 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff81de3cc/22a86782f05e4cb4ad3f2d35e3ad1076 [2020-10-29 13:55:07,956 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:55:07,963 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:55:07,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:55:07,969 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:55:07,976 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:55:07,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:55:07" (1/1) ... [2020-10-29 13:55:07,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21ec7e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:55:07, skipping insertion in model container [2020-10-29 13:55:07,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:55:07" (1/1) ... [2020-10-29 13:55:07,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:55:08,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:55:08,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:55:08,416 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:55:08,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:55:08,524 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:55:08,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:55:08 WrapperNode [2020-10-29 13:55:08,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:55:08,526 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:55:08,526 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:55:08,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:55:08,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:55:08" (1/1) ... [2020-10-29 13:55:08,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:55:08" (1/1) ... [2020-10-29 13:55:08,558 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:55:08" (1/1) ... [2020-10-29 13:55:08,559 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:55:08" (1/1) ... [2020-10-29 13:55:08,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:55:08" (1/1) ... [2020-10-29 13:55:08,592 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:55:08" (1/1) ... [2020-10-29 13:55:08,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:55:08" (1/1) ... [2020-10-29 13:55:08,604 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:55:08,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:55:08,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:55:08,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:55:08,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:55:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:55:08,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:55:08,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:55:08,699 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:55:08,699 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:55:08,699 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:55:08,699 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:55:08,699 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:55:08,699 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:55:08,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:55:08,700 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:55:08,700 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:55:08,700 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:55:08,700 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:55:08,700 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:55:08,701 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:55:08,701 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:55:08,701 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:55:08,701 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:55:08,701 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:55:08,701 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-29 13:55:08,702 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-29 13:55:08,702 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:55:08,702 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:55:08,702 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:55:08,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:55:08,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:55:08,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:55:08,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:55:08,703 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:55:08,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:55:09,708 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:55:09,708 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:55:09,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:55:09 BoogieIcfgContainer [2020-10-29 13:55:09,712 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:55:09,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:55:09,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:55:09,721 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:55:09,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:55:07" (1/3) ... [2020-10-29 13:55:09,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f307ac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:55:09, skipping insertion in model container [2020-10-29 13:55:09,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:55:08" (2/3) ... [2020-10-29 13:55:09,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f307ac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:55:09, skipping insertion in model container [2020-10-29 13:55:09,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:55:09" (3/3) ... [2020-10-29 13:55:09,726 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.2.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-29 13:55:09,743 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:55:09,750 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:55:09,765 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:55:09,805 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:55:09,805 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:55:09,805 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:55:09,806 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:55:09,806 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:55:09,806 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:55:09,806 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:55:09,806 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:55:09,832 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states. [2020-10-29 13:55:09,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-29 13:55:09,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:55:09,847 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:55:09,847 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:55:09,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:55:09,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1049231677, now seen corresponding path program 1 times [2020-10-29 13:55:09,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:55:09,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638360254] [2020-10-29 13:55:09,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:55:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:55:10,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:10,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:10,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:11,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:11,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:13,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:15,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:55:15,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-29 13:55:15,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:55:15,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-29 13:55:15,239 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:55:15,239 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:55:15,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:55:15,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 13:55:15,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-29 13:55:15,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 13:55:15,737 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-29 13:55:15,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:55:15,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:55:15,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:15,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:55:15,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:55:15,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:55:15,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-29 13:55:15,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:55:15,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:55:15,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:55:15,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:55:15,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:55:15,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:55:15,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:55:15,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638360254] [2020-10-29 13:55:15,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:55:15,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:55:15,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627232856] [2020-10-29 13:55:15,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:55:15,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:55:15,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:55:15,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:55:15,880 INFO L87 Difference]: Start difference. First operand 167 states. Second operand 9 states. [2020-10-29 13:55:16,335 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification that was a NOOP. DAG size: 211 [2020-10-29 13:55:17,973 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-29 13:55:18,335 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-29 13:55:18,696 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2020-10-29 13:55:18,983 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-29 13:55:19,276 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-29 13:55:19,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:55:19,369 INFO L93 Difference]: Finished difference Result 979 states and 1564 transitions. [2020-10-29 13:55:19,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:55:19,370 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 78 [2020-10-29 13:55:19,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:55:19,415 INFO L225 Difference]: With dead ends: 979 [2020-10-29 13:55:19,415 INFO L226 Difference]: Without dead ends: 832 [2020-10-29 13:55:19,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2020-10-29 13:55:19,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2020-10-29 13:55:19,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 269. [2020-10-29 13:55:19,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-29 13:55:19,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 400 transitions. [2020-10-29 13:55:19,550 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 400 transitions. Word has length 78 [2020-10-29 13:55:19,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:55:19,551 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 400 transitions. [2020-10-29 13:55:19,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:55:19,551 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 400 transitions. [2020-10-29 13:55:19,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-29 13:55:19,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:55:19,556 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] [2020-10-29 13:55:19,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:55:19,557 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:55:19,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:55:19,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1258700286, now seen corresponding path program 1 times [2020-10-29 13:55:19,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:55:19,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148980742] [2020-10-29 13:55:19,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:55:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:55:19,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:19,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:19,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:19,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:20,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:21,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:24,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:55:24,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 13:55:24,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:55:24,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-29 13:55:24,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:55:24,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:55:24,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:55:24,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-29 13:55:24,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 13:55:24,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:55:24,936 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-29 13:55:24,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:55:24,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:55:24,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:24,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:55:24,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:55:24,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:55:24,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:55:24,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:55:24,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:55:24,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:55:24,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:55:24,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:55:24,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:55:24,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:55:24,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148980742] [2020-10-29 13:55:24,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:55:24,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:55:24,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897355535] [2020-10-29 13:55:24,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:55:24,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:55:24,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:55:24,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:55:24,995 INFO L87 Difference]: Start difference. First operand 269 states and 400 transitions. Second operand 4 states. [2020-10-29 13:55:25,281 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-29 13:55:26,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:55:26,116 INFO L93 Difference]: Finished difference Result 679 states and 1052 transitions. [2020-10-29 13:55:26,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:55:26,116 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-29 13:55:26,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:55:26,120 INFO L225 Difference]: With dead ends: 679 [2020-10-29 13:55:26,120 INFO L226 Difference]: Without dead ends: 458 [2020-10-29 13:55:26,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:55:26,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-10-29 13:55:26,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 455. [2020-10-29 13:55:26,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2020-10-29 13:55:26,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 696 transitions. [2020-10-29 13:55:26,170 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 696 transitions. Word has length 79 [2020-10-29 13:55:26,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:55:26,170 INFO L481 AbstractCegarLoop]: Abstraction has 455 states and 696 transitions. [2020-10-29 13:55:26,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:55:26,171 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 696 transitions. [2020-10-29 13:55:26,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-29 13:55:26,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:55:26,174 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:55:26,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:55:26,175 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:55:26,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:55:26,175 INFO L82 PathProgramCache]: Analyzing trace with hash 447744381, now seen corresponding path program 1 times [2020-10-29 13:55:26,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:55:26,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281725265] [2020-10-29 13:55:26,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:55:26,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:55:26,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:26,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:26,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:26,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:27,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:28,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:55:28,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-29 13:55:28,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:55:28,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2446 [2020-10-29 13:55:28,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:55:28,657 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:55:28,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:55:28,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-29 13:55:28,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:55:28,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:55:28,997 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-29 13:55:28,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:55:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:55:29,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:29,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:55:29,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:55:29,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:55:29,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:55:29,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:55:29,022 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:55:29,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:55:29,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:55:29,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:55:29,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:55:29,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:55:29,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281725265] [2020-10-29 13:55:29,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:55:29,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:55:29,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22704171] [2020-10-29 13:55:29,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:55:29,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:55:29,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:55:29,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:55:29,059 INFO L87 Difference]: Start difference. First operand 455 states and 696 transitions. Second operand 4 states. [2020-10-29 13:55:29,339 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-29 13:55:30,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:55:30,179 INFO L93 Difference]: Finished difference Result 1205 states and 1888 transitions. [2020-10-29 13:55:30,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:55:30,180 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-29 13:55:30,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:55:30,186 INFO L225 Difference]: With dead ends: 1205 [2020-10-29 13:55:30,187 INFO L226 Difference]: Without dead ends: 798 [2020-10-29 13:55:30,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:55:30,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2020-10-29 13:55:30,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 795. [2020-10-29 13:55:30,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 795 states. [2020-10-29 13:55:30,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1234 transitions. [2020-10-29 13:55:30,275 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1234 transitions. Word has length 80 [2020-10-29 13:55:30,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:55:30,278 INFO L481 AbstractCegarLoop]: Abstraction has 795 states and 1234 transitions. [2020-10-29 13:55:30,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:55:30,278 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1234 transitions. [2020-10-29 13:55:30,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-29 13:55:30,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:55:30,284 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:55:30,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:55:30,285 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:55:30,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:55:30,287 INFO L82 PathProgramCache]: Analyzing trace with hash 414188807, now seen corresponding path program 1 times [2020-10-29 13:55:30,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:55:30,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967035355] [2020-10-29 13:55:30,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:55:30,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:55:30,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:30,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:30,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:30,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:31,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:55:31,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-29 13:55:31,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 13:55:31,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1296 [2020-10-29 13:55:31,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:55:31,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:55:31,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:55:31,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-29 13:55:31,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 13:55:31,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:55:31,929 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-29 13:55:31,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:55:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:55:31,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:31,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:55:31,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:55:31,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:55:31,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 13:55:31,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:55:31,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:55:31,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:55:31,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:55:31,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:55:31,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:55:31,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:55:31,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967035355] [2020-10-29 13:55:31,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:55:31,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:55:31,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095684672] [2020-10-29 13:55:31,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:55:31,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:55:31,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:55:31,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:55:31,985 INFO L87 Difference]: Start difference. First operand 795 states and 1234 transitions. Second operand 4 states. [2020-10-29 13:55:32,293 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-29 13:55:33,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:55:33,153 INFO L93 Difference]: Finished difference Result 2161 states and 3398 transitions. [2020-10-29 13:55:33,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:55:33,154 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-29 13:55:33,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:55:33,166 INFO L225 Difference]: With dead ends: 2161 [2020-10-29 13:55:33,166 INFO L226 Difference]: Without dead ends: 1414 [2020-10-29 13:55:33,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:55:33,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1414 states. [2020-10-29 13:55:33,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1414 to 1411. [2020-10-29 13:55:33,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1411 states. [2020-10-29 13:55:33,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 2202 transitions. [2020-10-29 13:55:33,267 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 2202 transitions. Word has length 81 [2020-10-29 13:55:33,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:55:33,269 INFO L481 AbstractCegarLoop]: Abstraction has 1411 states and 2202 transitions. [2020-10-29 13:55:33,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:55:33,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 2202 transitions. [2020-10-29 13:55:33,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-29 13:55:33,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:55:33,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:55:33,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:55:33,272 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:55:33,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:55:33,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1908812729, now seen corresponding path program 1 times [2020-10-29 13:55:33,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:55:33,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985189749] [2020-10-29 13:55:33,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:55:33,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:55:33,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:33,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:33,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:34,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:55:34,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-29 13:55:34,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:55:34,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 698 [2020-10-29 13:55:34,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:55:34,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:55:34,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:55:34,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 13:55:34,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 13:55:34,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:55:34,322 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-29 13:55:34,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:55:34,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:55:34,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:34,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:55:34,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:55:34,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:55:34,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:55:34,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:55:34,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:55:34,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:55:34,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:55:34,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:55:34,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:55:34,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:55:34,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985189749] [2020-10-29 13:55:34,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:55:34,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:55:34,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715994135] [2020-10-29 13:55:34,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:55:34,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:55:34,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:55:34,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:55:34,374 INFO L87 Difference]: Start difference. First operand 1411 states and 2202 transitions. Second operand 4 states. [2020-10-29 13:55:34,655 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-29 13:55:35,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:55:35,681 INFO L93 Difference]: Finished difference Result 3881 states and 6094 transitions. [2020-10-29 13:55:35,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:55:35,682 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-29 13:55:35,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:55:35,698 INFO L225 Difference]: With dead ends: 3881 [2020-10-29 13:55:35,701 INFO L226 Difference]: Without dead ends: 2518 [2020-10-29 13:55:35,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:55:35,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2518 states. [2020-10-29 13:55:35,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2518 to 2515. [2020-10-29 13:55:35,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2515 states. [2020-10-29 13:55:35,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2515 states to 2515 states and 3922 transitions. [2020-10-29 13:55:35,872 INFO L78 Accepts]: Start accepts. Automaton has 2515 states and 3922 transitions. Word has length 82 [2020-10-29 13:55:35,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:55:35,872 INFO L481 AbstractCegarLoop]: Abstraction has 2515 states and 3922 transitions. [2020-10-29 13:55:35,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:55:35,873 INFO L276 IsEmpty]: Start isEmpty. Operand 2515 states and 3922 transitions. [2020-10-29 13:55:35,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-29 13:55:35,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:55:35,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:55:35,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:55:35,874 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:55:35,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:55:35,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1477047420, now seen corresponding path program 1 times [2020-10-29 13:55:35,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:55:35,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398102659] [2020-10-29 13:55:35,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:55:35,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:55:35,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:36,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:36,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:55:36,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-29 13:55:36,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:55:36,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 441 [2020-10-29 13:55:36,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:55:36,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:55:36,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:55:36,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 13:55:36,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 13:55:36,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:55:36,611 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-29 13:55:36,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:55:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:55:36,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:36,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:55:36,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:55:36,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:55:36,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:55:36,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:55:36,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:55:36,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:55:36,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:55:36,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:55:36,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:55:36,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:55:36,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398102659] [2020-10-29 13:55:36,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:55:36,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:55:36,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476639680] [2020-10-29 13:55:36,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:55:36,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:55:36,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:55:36,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:55:36,671 INFO L87 Difference]: Start difference. First operand 2515 states and 3922 transitions. Second operand 4 states. [2020-10-29 13:55:36,974 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-29 13:55:38,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:55:38,052 INFO L93 Difference]: Finished difference Result 6937 states and 10838 transitions. [2020-10-29 13:55:38,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:55:38,053 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-29 13:55:38,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:55:38,078 INFO L225 Difference]: With dead ends: 6937 [2020-10-29 13:55:38,078 INFO L226 Difference]: Without dead ends: 4470 [2020-10-29 13:55:38,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:55:38,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4470 states. [2020-10-29 13:55:38,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4470 to 4467. [2020-10-29 13:55:38,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4467 states. [2020-10-29 13:55:38,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4467 states to 4467 states and 6930 transitions. [2020-10-29 13:55:38,348 INFO L78 Accepts]: Start accepts. Automaton has 4467 states and 6930 transitions. Word has length 83 [2020-10-29 13:55:38,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:55:38,349 INFO L481 AbstractCegarLoop]: Abstraction has 4467 states and 6930 transitions. [2020-10-29 13:55:38,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:55:38,349 INFO L276 IsEmpty]: Start isEmpty. Operand 4467 states and 6930 transitions. [2020-10-29 13:55:38,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 13:55:38,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:55:38,356 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:55:38,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:55:38,357 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:55:38,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:55:38,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1770630148, now seen corresponding path program 1 times [2020-10-29 13:55:38,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:55:38,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337070278] [2020-10-29 13:55:38,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:55:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:55:38,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:38,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:39,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:55:39,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-29 13:55:39,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:55:39,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 899 [2020-10-29 13:55:39,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:55:39,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:55:39,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:55:39,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-29 13:55:39,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-29 13:55:39,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:55:39,668 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-29 13:55:39,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:55:39,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:55:39,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:39,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:55:39,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:55:39,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:55:39,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:55:39,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:55:39,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:55:39,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:55:39,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:55:39,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:55:39,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:55:39,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:55:39,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337070278] [2020-10-29 13:55:39,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:55:39,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:55:39,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405056020] [2020-10-29 13:55:39,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:55:39,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:55:39,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:55:39,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:55:39,827 INFO L87 Difference]: Start difference. First operand 4467 states and 6930 transitions. Second operand 9 states. [2020-10-29 13:55:41,127 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 216 [2020-10-29 13:55:41,510 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 214 [2020-10-29 13:55:41,826 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-10-29 13:55:42,152 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 210 [2020-10-29 13:55:42,448 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-29 13:55:42,748 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-29 13:55:45,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:55:45,613 INFO L93 Difference]: Finished difference Result 27301 states and 42142 transitions. [2020-10-29 13:55:45,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:55:45,614 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 84 [2020-10-29 13:55:45,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:55:45,705 INFO L225 Difference]: With dead ends: 27301 [2020-10-29 13:55:45,706 INFO L226 Difference]: Without dead ends: 22882 [2020-10-29 13:55:45,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-29 13:55:45,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22882 states. [2020-10-29 13:55:47,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22882 to 22867. [2020-10-29 13:55:47,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22867 states. [2020-10-29 13:55:47,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22867 states to 22867 states and 35186 transitions. [2020-10-29 13:55:47,605 INFO L78 Accepts]: Start accepts. Automaton has 22867 states and 35186 transitions. Word has length 84 [2020-10-29 13:55:47,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:55:47,605 INFO L481 AbstractCegarLoop]: Abstraction has 22867 states and 35186 transitions. [2020-10-29 13:55:47,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:55:47,606 INFO L276 IsEmpty]: Start isEmpty. Operand 22867 states and 35186 transitions. [2020-10-29 13:55:47,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-29 13:55:47,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:55:47,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:55:47,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:55:47,609 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:55:47,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:55:47,609 INFO L82 PathProgramCache]: Analyzing trace with hash 625853597, now seen corresponding path program 1 times [2020-10-29 13:55:47,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:55:47,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920304281] [2020-10-29 13:55:47,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:55:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:55:47,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:47,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:48,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:55:48,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-29 13:55:48,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:55:48,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 437 [2020-10-29 13:55:48,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:55:48,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:55:48,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:55:48,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 13:55:48,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 13:55:48,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:55:48,409 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-29 13:55:48,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:55:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:55:48,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:48,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:55:48,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:55:48,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:55:48,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-29 13:55:48,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:55:48,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:55:48,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:55:48,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:55:48,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:55:48,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:55:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:55:48,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920304281] [2020-10-29 13:55:48,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:55:48,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:55:48,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257461001] [2020-10-29 13:55:48,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:55:48,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:55:48,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:55:48,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:55:48,486 INFO L87 Difference]: Start difference. First operand 22867 states and 35186 transitions. Second operand 4 states. [2020-10-29 13:55:48,783 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-29 13:55:51,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:55:51,625 INFO L93 Difference]: Finished difference Result 64281 states and 98550 transitions. [2020-10-29 13:55:51,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:55:51,626 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-29 13:55:51,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:55:51,834 INFO L225 Difference]: With dead ends: 64281 [2020-10-29 13:55:51,834 INFO L226 Difference]: Without dead ends: 41462 [2020-10-29 13:55:51,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:55:51,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41462 states. [2020-10-29 13:55:54,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41462 to 41459. [2020-10-29 13:55:54,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41459 states. [2020-10-29 13:55:54,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41459 states to 41459 states and 63026 transitions. [2020-10-29 13:55:54,860 INFO L78 Accepts]: Start accepts. Automaton has 41459 states and 63026 transitions. Word has length 84 [2020-10-29 13:55:54,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:55:54,860 INFO L481 AbstractCegarLoop]: Abstraction has 41459 states and 63026 transitions. [2020-10-29 13:55:54,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:55:54,860 INFO L276 IsEmpty]: Start isEmpty. Operand 41459 states and 63026 transitions. [2020-10-29 13:55:54,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-29 13:55:54,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:55:54,862 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:55:54,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:55:54,862 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:55:54,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:55:54,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1871337587, now seen corresponding path program 1 times [2020-10-29 13:55:54,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:55:54,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515765773] [2020-10-29 13:55:54,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:55:54,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:55:54,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:55,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:55,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:55:55,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 13:55:55,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 13:55:55,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 488 [2020-10-29 13:55:55,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:55:55,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:55:55,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:55:55,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:55:55,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 13:55:55,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:55:55,760 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-29 13:55:55,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:55:55,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:55:55,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:55:55,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:55:55,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:55:55,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:55:55,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-29 13:55:55,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:55:55,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:55:55,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:55:55,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:55:55,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:55:55,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:55:55,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:55:55,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515765773] [2020-10-29 13:55:55,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:55:55,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:55:55,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90533165] [2020-10-29 13:55:55,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:55:55,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:55:55,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:55:55,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:55:55,849 INFO L87 Difference]: Start difference. First operand 41459 states and 63026 transitions. Second operand 6 states. [2020-10-29 13:55:56,133 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-10-29 13:55:58,182 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 206 [2020-10-29 13:56:01,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:56:01,902 INFO L93 Difference]: Finished difference Result 123641 states and 187702 transitions. [2020-10-29 13:56:01,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:56:01,903 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2020-10-29 13:56:01,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:56:02,134 INFO L225 Difference]: With dead ends: 123641 [2020-10-29 13:56:02,134 INFO L226 Difference]: Without dead ends: 82230 [2020-10-29 13:56:02,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:56:02,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82230 states. [2020-10-29 13:56:07,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82230 to 82227. [2020-10-29 13:56:07,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82227 states. [2020-10-29 13:56:08,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82227 states to 82227 states and 124082 transitions. [2020-10-29 13:56:08,096 INFO L78 Accepts]: Start accepts. Automaton has 82227 states and 124082 transitions. Word has length 86 [2020-10-29 13:56:08,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:56:08,096 INFO L481 AbstractCegarLoop]: Abstraction has 82227 states and 124082 transitions. [2020-10-29 13:56:08,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:56:08,097 INFO L276 IsEmpty]: Start isEmpty. Operand 82227 states and 124082 transitions. [2020-10-29 13:56:08,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-29 13:56:08,101 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:56:08,101 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:56:08,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:56:08,101 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:56:08,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:56:08,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1515376686, now seen corresponding path program 1 times [2020-10-29 13:56:08,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:56:08,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197442814] [2020-10-29 13:56:08,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:56:08,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:56:08,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:08,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:56:08,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-29 13:56:08,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:56:08,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-29 13:56:08,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:56:08,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:56:08,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:56:08,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-29 13:56:08,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-29 13:56:08,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:56:08,662 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-29 13:56:08,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:56:08,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:56:08,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:08,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:56:08,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:56:08,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:56:08,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:56:08,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:56:08,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:56:08,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:56:08,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:56:08,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:56:08,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:56:08,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:56:08,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197442814] [2020-10-29 13:56:08,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:56:08,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:56:08,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829052655] [2020-10-29 13:56:08,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:56:08,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:56:08,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:56:08,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:56:08,711 INFO L87 Difference]: Start difference. First operand 82227 states and 124082 transitions. Second operand 5 states. [2020-10-29 13:56:19,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:56:19,425 INFO L93 Difference]: Finished difference Result 167478 states and 251188 transitions. [2020-10-29 13:56:19,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:56:19,426 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 86 [2020-10-29 13:56:19,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:56:20,039 INFO L225 Difference]: With dead ends: 167478 [2020-10-29 13:56:20,040 INFO L226 Difference]: Without dead ends: 167475 [2020-10-29 13:56:20,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:56:20,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167475 states. [2020-10-29 13:56:26,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167475 to 85299. [2020-10-29 13:56:26,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85299 states. [2020-10-29 13:56:27,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85299 states to 85299 states and 127154 transitions. [2020-10-29 13:56:27,133 INFO L78 Accepts]: Start accepts. Automaton has 85299 states and 127154 transitions. Word has length 86 [2020-10-29 13:56:27,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:56:27,133 INFO L481 AbstractCegarLoop]: Abstraction has 85299 states and 127154 transitions. [2020-10-29 13:56:27,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:56:27,133 INFO L276 IsEmpty]: Start isEmpty. Operand 85299 states and 127154 transitions. [2020-10-29 13:56:27,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-29 13:56:27,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:56:27,134 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] [2020-10-29 13:56:27,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:56:27,135 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:56:27,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:56:27,135 INFO L82 PathProgramCache]: Analyzing trace with hash 29908260, now seen corresponding path program 1 times [2020-10-29 13:56:27,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:56:27,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644960046] [2020-10-29 13:56:27,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:56:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:56:27,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:27,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:56:27,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-29 13:56:27,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:56:27,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 366 [2020-10-29 13:56:27,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:56:27,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:56:27,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:56:27,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:56:27,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 13:56:27,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:56:27,875 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-29 13:56:27,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:56:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:56:27,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:27,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:56:27,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:56:27,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:56:27,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 13:56:27,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:56:27,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:56:27,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:56:27,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:56:27,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:56:27,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:56:27,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:56:27,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644960046] [2020-10-29 13:56:27,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:56:27,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:56:27,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650151092] [2020-10-29 13:56:27,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:56:27,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:56:27,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:56:27,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:56:27,932 INFO L87 Difference]: Start difference. First operand 85299 states and 127154 transitions. Second operand 4 states. [2020-10-29 13:56:28,262 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-29 13:56:36,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:56:36,802 INFO L93 Difference]: Finished difference Result 208843 states and 311176 transitions. [2020-10-29 13:56:36,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:56:36,803 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2020-10-29 13:56:36,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:56:37,041 INFO L225 Difference]: With dead ends: 208843 [2020-10-29 13:56:37,041 INFO L226 Difference]: Without dead ends: 123592 [2020-10-29 13:56:37,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:56:37,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123592 states. [2020-10-29 13:56:45,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123592 to 123589. [2020-10-29 13:56:45,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123589 states. [2020-10-29 13:56:46,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123589 states to 123589 states and 183364 transitions. [2020-10-29 13:56:46,331 INFO L78 Accepts]: Start accepts. Automaton has 123589 states and 183364 transitions. Word has length 87 [2020-10-29 13:56:46,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:56:46,331 INFO L481 AbstractCegarLoop]: Abstraction has 123589 states and 183364 transitions. [2020-10-29 13:56:46,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:56:46,331 INFO L276 IsEmpty]: Start isEmpty. Operand 123589 states and 183364 transitions. [2020-10-29 13:56:46,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-29 13:56:46,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:56:46,383 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:56:46,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 13:56:46,384 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:56:46,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:56:46,384 INFO L82 PathProgramCache]: Analyzing trace with hash -593523029, now seen corresponding path program 1 times [2020-10-29 13:56:46,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:56:46,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048887837] [2020-10-29 13:56:46,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:56:46,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:56:46,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:46,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:46,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:49,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:56:49,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-29 13:56:49,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 13:56:49,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3030 [2020-10-29 13:56:49,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:56:49,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:56:49,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:56:49,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 13:56:49,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-29 13:56:49,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:56:49,801 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-29 13:56:49,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:56:49,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:56:49,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:56:49,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:56:49,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:56:49,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:56:49,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 13:56:49,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:56:49,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:56:49,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:56:49,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:56:49,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:56:49,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:56:49,891 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-29 13:56:49,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048887837] [2020-10-29 13:56:49,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:56:49,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-29 13:56:49,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584201131] [2020-10-29 13:56:49,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:56:49,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:56:49,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:56:49,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:56:49,894 INFO L87 Difference]: Start difference. First operand 123589 states and 183364 transitions. Second operand 5 states. [2020-10-29 13:56:50,250 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-10-29 13:56:52,333 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-29 13:57:04,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:57:04,602 INFO L93 Difference]: Finished difference Result 290766 states and 432458 transitions. [2020-10-29 13:57:04,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 13:57:04,602 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 116 [2020-10-29 13:57:04,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:57:05,210 INFO L225 Difference]: With dead ends: 290766 [2020-10-29 13:57:05,210 INFO L226 Difference]: Without dead ends: 205515 [2020-10-29 13:57:05,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:57:05,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205515 states. [2020-10-29 13:57:19,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205515 to 205509. [2020-10-29 13:57:19,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205509 states. [2020-10-29 13:57:20,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205509 states to 205509 states and 303812 transitions. [2020-10-29 13:57:20,433 INFO L78 Accepts]: Start accepts. Automaton has 205509 states and 303812 transitions. Word has length 116 [2020-10-29 13:57:20,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:57:20,433 INFO L481 AbstractCegarLoop]: Abstraction has 205509 states and 303812 transitions. [2020-10-29 13:57:20,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:57:20,433 INFO L276 IsEmpty]: Start isEmpty. Operand 205509 states and 303812 transitions. [2020-10-29 13:57:20,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-29 13:57:20,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:57:20,485 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:57:20,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 13:57:20,485 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:57:20,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:57:20,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1475141960, now seen corresponding path program 1 times [2020-10-29 13:57:20,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:57:20,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264969132] [2020-10-29 13:57:20,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:57:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:20,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:20,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:20,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:21,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:21,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:21,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:24,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:25,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:25,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:25,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-29 13:57:25,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:57:25,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-29 13:57:25,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:25,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:25,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:57:25,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 13:57:25,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-29 13:57:25,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:57:25,884 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 199 [2020-10-29 13:57:25,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:57:25,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:57:25,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:57:25,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:57:25,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:57:25,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:57:25,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 13:57:25,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:57:25,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:57:25,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:57:25,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:57:25,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:57:25,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:57:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:57:25,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264969132] [2020-10-29 13:57:25,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 13:57:25,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-29 13:57:25,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211494525] [2020-10-29 13:57:25,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:57:25,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:57:25,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:57:25,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:57:25,927 INFO L87 Difference]: Start difference. First operand 205509 states and 303812 transitions. Second operand 8 states. [2020-10-29 13:57:26,240 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 200 [2020-10-29 13:57:31,913 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 205 [2020-10-29 13:57:32,339 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2020-10-29 13:57:32,899 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 201