/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:38:23,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:38:23,122 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:38:23,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:38:23,182 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:38:23,189 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:38:23,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:38:23,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:38:23,200 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:38:23,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:38:23,208 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:38:23,209 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:38:23,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:38:23,213 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:38:23,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:38:23,220 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:38:23,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:38:23,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:38:23,234 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:38:23,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:38:23,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:38:23,247 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:38:23,248 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:38:23,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:38:23,260 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:38:23,263 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:38:23,286 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:38:23,288 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:38:23,292 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:38:23,294 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:38:23,294 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:38:23,295 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:38:23,298 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:38:23,307 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:38:23,311 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:38:23,312 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:38:23,312 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:38:23,313 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:38:23,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:38:23,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:38:23,318 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:38:23,327 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 05:38:23,360 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:38:23,360 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:38:23,362 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:38:23,362 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:38:23,362 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:38:23,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:38:23,363 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:38:23,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:38:23,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:38:23,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:38:23,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:38:23,364 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:38:23,364 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:38:23,364 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:38:23,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:38:23,364 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:38:23,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:38:23,365 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:38:23,365 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:38:23,365 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:38:23,365 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:38:23,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:38:23,366 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:38:23,366 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:38:23,366 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:38:23,366 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:38:23,367 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:38:23,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:38:23,367 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:38:23,367 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:38:23,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:38:23,842 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:38:23,845 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:38:23,846 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:38:23,847 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:38:23,848 INFO L432 ainManager$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.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 05:38:23,939 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf08f47c2/fe86839075dc423db543475c280695ce/FLAG6fb33ff48 [2020-10-27 05:38:24,599 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:38:24,600 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 05:38:24,626 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf08f47c2/fe86839075dc423db543475c280695ce/FLAG6fb33ff48 [2020-10-27 05:38:24,884 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cf08f47c2/fe86839075dc423db543475c280695ce [2020-10-27 05:38:24,892 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:38:24,901 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:38:24,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:38:24,907 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:38:24,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:38:24,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:38:24" (1/1) ... [2020-10-27 05:38:24,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3895647d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:24, skipping insertion in model container [2020-10-27 05:38:24,918 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:38:24" (1/1) ... [2020-10-27 05:38:24,927 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:38:24,993 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:38:25,396 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:38:25,412 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:38:25,632 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:38:25,665 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:38:25,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:25 WrapperNode [2020-10-27 05:38:25,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:38:25,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:38:25,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:38:25,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:38:25,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:25" (1/1) ... [2020-10-27 05:38:25,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:25" (1/1) ... [2020-10-27 05:38:25,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:25" (1/1) ... [2020-10-27 05:38:25,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:25" (1/1) ... [2020-10-27 05:38:25,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:25" (1/1) ... [2020-10-27 05:38:25,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:25" (1/1) ... [2020-10-27 05:38:25,738 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:25" (1/1) ... [2020-10-27 05:38:25,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:38:25,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:38:25,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:38:25,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:38:25,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:25" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:38:25,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:38:25,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:38:25,826 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:38:25,827 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:38:25,827 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:38:25,827 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:38:25,827 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:38:25,827 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:38:25,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:38:25,827 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:38:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:38:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:38:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:38:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:38:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:38:25,828 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:38:25,829 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:38:25,829 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:38:25,829 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:38:25,829 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:38:25,829 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:38:25,829 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:38:25,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:38:25,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:38:25,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:38:25,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:38:25,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:38:25,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:38:26,841 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:38:26,841 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:38:26,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:38:26 BoogieIcfgContainer [2020-10-27 05:38:26,846 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:38:26,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:38:26,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:38:26,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:38:26,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:38:24" (1/3) ... [2020-10-27 05:38:26,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e11f4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:38:26, skipping insertion in model container [2020-10-27 05:38:26,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:38:25" (2/3) ... [2020-10-27 05:38:26,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e11f4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:38:26, skipping insertion in model container [2020-10-27 05:38:26,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:38:26" (3/3) ... [2020-10-27 05:38:26,856 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 05:38:26,869 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:38:26,880 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:38:26,916 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:38:26,988 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:38:26,989 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:38:26,989 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:38:26,990 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:38:26,990 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:38:26,990 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:38:26,990 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:38:26,990 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:38:27,058 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states. [2020-10-27 05:38:27,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 05:38:27,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:27,083 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] [2020-10-27 05:38:27,083 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:27,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:27,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1313524885, now seen corresponding path program 1 times [2020-10-27 05:38:27,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:27,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788075200] [2020-10-27 05:38:27,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:27,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:27,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:27,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:27,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:29,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:29,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 05:38:29,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:38:29,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2302 [2020-10-27 05:38:29,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:29,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:38:29,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:38:29,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 05:38:29,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:38:30,072 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:38:30,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:30,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:30,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:30,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:30,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:30,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 05:38:30,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:30,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:38:30,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:30,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:38:30,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:38:30,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788075200] [2020-10-27 05:38:30,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:30,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:38:30,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551379214] [2020-10-27 05:38:30,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:38:30,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:30,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:38:30,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:38:30,207 INFO L87 Difference]: Start difference. First operand 170 states. Second operand 6 states. [2020-10-27 05:38:31,201 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 05:38:31,409 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:38:31,599 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:38:32,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:32,321 INFO L93 Difference]: Finished difference Result 493 states and 803 transitions. [2020-10-27 05:38:32,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:38:32,326 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 54 [2020-10-27 05:38:32,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:32,342 INFO L225 Difference]: With dead ends: 493 [2020-10-27 05:38:32,342 INFO L226 Difference]: Without dead ends: 356 [2020-10-27 05:38:32,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:38:32,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-10-27 05:38:32,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 350. [2020-10-27 05:38:32,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-27 05:38:32,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 523 transitions. [2020-10-27 05:38:32,440 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 523 transitions. Word has length 54 [2020-10-27 05:38:32,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:32,440 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 523 transitions. [2020-10-27 05:38:32,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:38:32,441 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 523 transitions. [2020-10-27 05:38:32,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:38:32,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:32,444 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] [2020-10-27 05:38:32,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:38:32,445 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:32,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:32,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1543468143, now seen corresponding path program 1 times [2020-10-27 05:38:32,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:32,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903893222] [2020-10-27 05:38:32,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:32,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:32,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:32,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:32,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:33,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:33,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:38:33,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:38:33,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1135 [2020-10-27 05:38:33,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:33,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:38:33,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:38:33,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 05:38:33,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:33,899 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:38:33,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:33,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:33,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:33,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:33,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:33,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 05:38:33,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:33,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:38:33,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:33,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:38:33,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:33,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:38:33,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903893222] [2020-10-27 05:38:33,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:33,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:38:33,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203566619] [2020-10-27 05:38:33,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:38:33,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:33,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:38:33,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:38:33,967 INFO L87 Difference]: Start difference. First operand 350 states and 523 transitions. Second operand 6 states. [2020-10-27 05:38:34,212 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:38:34,877 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 05:38:35,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:35,441 INFO L93 Difference]: Finished difference Result 909 states and 1384 transitions. [2020-10-27 05:38:35,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:38:35,443 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-27 05:38:35,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:35,455 INFO L225 Difference]: With dead ends: 909 [2020-10-27 05:38:35,455 INFO L226 Difference]: Without dead ends: 590 [2020-10-27 05:38:35,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:38:35,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2020-10-27 05:38:35,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 587. [2020-10-27 05:38:35,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 587 states. [2020-10-27 05:38:35,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 882 transitions. [2020-10-27 05:38:35,589 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 882 transitions. Word has length 55 [2020-10-27 05:38:35,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:35,590 INFO L481 AbstractCegarLoop]: Abstraction has 587 states and 882 transitions. [2020-10-27 05:38:35,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:38:35,590 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 882 transitions. [2020-10-27 05:38:35,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:38:35,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:35,598 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] [2020-10-27 05:38:35,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:38:35,599 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:35,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:35,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1000679373, now seen corresponding path program 1 times [2020-10-27 05:38:35,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:35,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876814489] [2020-10-27 05:38:35,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:35,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:35,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:35,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:36,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:36,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:38:36,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:38:36,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 909 [2020-10-27 05:38:36,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:36,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:38:36,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:38:36,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 05:38:36,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:36,836 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:38:36,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:36,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:36,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:36,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:36,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:36,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:36,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 05:38:36,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:36,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:38:36,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:36,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:38:36,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:36,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:38:36,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876814489] [2020-10-27 05:38:36,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:36,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:38:36,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269907411] [2020-10-27 05:38:36,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:38:36,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:36,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:38:36,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:38:36,932 INFO L87 Difference]: Start difference. First operand 587 states and 882 transitions. Second operand 6 states. [2020-10-27 05:38:37,145 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:38:37,689 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 05:38:38,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:38,205 INFO L93 Difference]: Finished difference Result 1528 states and 2329 transitions. [2020-10-27 05:38:38,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:38:38,206 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-27 05:38:38,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:38,213 INFO L225 Difference]: With dead ends: 1528 [2020-10-27 05:38:38,213 INFO L226 Difference]: Without dead ends: 1008 [2020-10-27 05:38:38,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:38:38,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2020-10-27 05:38:38,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 1005. [2020-10-27 05:38:38,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1005 states. [2020-10-27 05:38:38,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 1519 transitions. [2020-10-27 05:38:38,309 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 1519 transitions. Word has length 55 [2020-10-27 05:38:38,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:38,312 INFO L481 AbstractCegarLoop]: Abstraction has 1005 states and 1519 transitions. [2020-10-27 05:38:38,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:38:38,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 1519 transitions. [2020-10-27 05:38:38,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:38:38,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:38,322 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] [2020-10-27 05:38:38,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:38:38,323 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:38,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:38,324 INFO L82 PathProgramCache]: Analyzing trace with hash 773360610, now seen corresponding path program 1 times [2020-10-27 05:38:38,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:38,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698976718] [2020-10-27 05:38:38,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:38,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:38,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:38,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:38,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:39,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:39,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:38:39,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:38:39,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 951 [2020-10-27 05:38:39,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:39,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:38:39,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:38:39,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 05:38:39,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:39,624 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:38:39,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:39,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:39,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:39,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:39,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:39,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:39,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 05:38:39,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:39,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:38:39,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:39,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:38:39,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:38:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:38:39,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698976718] [2020-10-27 05:38:39,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:39,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:38:39,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285765877] [2020-10-27 05:38:39,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:38:39,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:39,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:38:39,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:38:39,718 INFO L87 Difference]: Start difference. First operand 1005 states and 1519 transitions. Second operand 6 states. [2020-10-27 05:38:40,060 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:38:40,633 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 05:38:41,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:41,216 INFO L93 Difference]: Finished difference Result 2820 states and 4292 transitions. [2020-10-27 05:38:41,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:38:41,217 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-27 05:38:41,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:41,228 INFO L225 Difference]: With dead ends: 2820 [2020-10-27 05:38:41,229 INFO L226 Difference]: Without dead ends: 1862 [2020-10-27 05:38:41,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:38:41,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2020-10-27 05:38:41,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1859. [2020-10-27 05:38:41,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1859 states. [2020-10-27 05:38:41,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 2808 transitions. [2020-10-27 05:38:41,391 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 2808 transitions. Word has length 55 [2020-10-27 05:38:41,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:41,392 INFO L481 AbstractCegarLoop]: Abstraction has 1859 states and 2808 transitions. [2020-10-27 05:38:41,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:38:41,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 2808 transitions. [2020-10-27 05:38:41,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:38:41,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:41,394 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] [2020-10-27 05:38:41,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:38:41,394 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:41,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:41,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1820468650, now seen corresponding path program 1 times [2020-10-27 05:38:41,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:41,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820464359] [2020-10-27 05:38:41,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:41,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:41,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:41,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:41,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:41,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:43,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:43,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:38:43,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:38:43,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2393 [2020-10-27 05:38:43,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:43,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:38:43,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:38:43,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:38:43,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:44,411 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:38:44,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:44,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:44,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:44,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:44,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:44,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-27 05:38:44,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:44,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:38:44,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:44,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:38:44,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:38:44,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820464359] [2020-10-27 05:38:44,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:44,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:38:44,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399535137] [2020-10-27 05:38:44,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:38:44,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:44,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:38:44,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:38:44,501 INFO L87 Difference]: Start difference. First operand 1859 states and 2808 transitions. Second operand 11 states. [2020-10-27 05:38:44,770 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:38:45,873 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 05:38:46,160 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:38:48,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:48,054 INFO L93 Difference]: Finished difference Result 7320 states and 10995 transitions. [2020-10-27 05:38:48,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 05:38:48,054 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-27 05:38:48,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:48,086 INFO L225 Difference]: With dead ends: 7320 [2020-10-27 05:38:48,086 INFO L226 Difference]: Without dead ends: 5867 [2020-10-27 05:38:48,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=238, Invalid=754, Unknown=0, NotChecked=0, Total=992 [2020-10-27 05:38:48,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5867 states. [2020-10-27 05:38:48,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5867 to 1826. [2020-10-27 05:38:48,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1826 states. [2020-10-27 05:38:48,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 2743 transitions. [2020-10-27 05:38:48,351 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 2743 transitions. Word has length 56 [2020-10-27 05:38:48,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:48,352 INFO L481 AbstractCegarLoop]: Abstraction has 1826 states and 2743 transitions. [2020-10-27 05:38:48,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:38:48,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 2743 transitions. [2020-10-27 05:38:48,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:38:48,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:48,354 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] [2020-10-27 05:38:48,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:38:48,354 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:48,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:48,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1888864662, now seen corresponding path program 1 times [2020-10-27 05:38:48,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:48,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175058571] [2020-10-27 05:38:48,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:48,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:48,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:48,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:48,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:48,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:51,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:51,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:38:51,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:38:51,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2681 [2020-10-27 05:38:51,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:51,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:38:51,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:38:51,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 05:38:51,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:51,397 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:38:51,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:51,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:51,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:51,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:51,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:51,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:51,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:38:51,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:51,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:38:51,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:51,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:38:51,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:38:51,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175058571] [2020-10-27 05:38:51,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:51,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:38:51,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210564793] [2020-10-27 05:38:51,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:38:51,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:51,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:38:51,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:38:51,456 INFO L87 Difference]: Start difference. First operand 1826 states and 2743 transitions. Second operand 11 states. [2020-10-27 05:38:51,759 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 146 [2020-10-27 05:38:53,017 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:38:53,282 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 05:38:55,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:38:55,380 INFO L93 Difference]: Finished difference Result 5920 states and 8933 transitions. [2020-10-27 05:38:55,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 05:38:55,381 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-27 05:38:55,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:38:55,408 INFO L225 Difference]: With dead ends: 5920 [2020-10-27 05:38:55,408 INFO L226 Difference]: Without dead ends: 5364 [2020-10-27 05:38:55,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2020-10-27 05:38:55,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5364 states. [2020-10-27 05:38:55,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5364 to 1826. [2020-10-27 05:38:55,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1826 states. [2020-10-27 05:38:55,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 2741 transitions. [2020-10-27 05:38:55,656 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 2741 transitions. Word has length 56 [2020-10-27 05:38:55,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:38:55,657 INFO L481 AbstractCegarLoop]: Abstraction has 1826 states and 2741 transitions. [2020-10-27 05:38:55,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:38:55,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 2741 transitions. [2020-10-27 05:38:55,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:38:55,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:38:55,659 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] [2020-10-27 05:38:55,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:38:55,659 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:38:55,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:38:55,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1973177866, now seen corresponding path program 1 times [2020-10-27 05:38:55,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:38:55,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730196835] [2020-10-27 05:38:55,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:38:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:55,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:55,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:55,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:55,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:58,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:58,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:38:58,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:38:58,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2407 [2020-10-27 05:38:58,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:58,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:38:58,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:38:58,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:38:58,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:58,461 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:38:58,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:38:58,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:38:58,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:38:58,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:38:58,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:38:58,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:38:58,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:38:58,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:38:58,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:38:58,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:38:58,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:38:58,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:38:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:38:58,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730196835] [2020-10-27 05:38:58,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:38:58,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:38:58,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153119484] [2020-10-27 05:38:58,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:38:58,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:38:58,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:38:58,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:38:58,522 INFO L87 Difference]: Start difference. First operand 1826 states and 2741 transitions. Second operand 11 states. [2020-10-27 05:38:58,807 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:39:00,025 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-27 05:39:00,273 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 05:39:03,421 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:39:04,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:39:04,101 INFO L93 Difference]: Finished difference Result 9737 states and 14828 transitions. [2020-10-27 05:39:04,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 05:39:04,102 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-27 05:39:04,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:39:04,143 INFO L225 Difference]: With dead ends: 9737 [2020-10-27 05:39:04,143 INFO L226 Difference]: Without dead ends: 8730 [2020-10-27 05:39:04,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=296, Invalid=1110, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 05:39:04,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8730 states. [2020-10-27 05:39:04,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8730 to 1902. [2020-10-27 05:39:04,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1902 states. [2020-10-27 05:39:04,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1902 states to 1902 states and 2836 transitions. [2020-10-27 05:39:04,528 INFO L78 Accepts]: Start accepts. Automaton has 1902 states and 2836 transitions. Word has length 56 [2020-10-27 05:39:04,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:39:04,528 INFO L481 AbstractCegarLoop]: Abstraction has 1902 states and 2836 transitions. [2020-10-27 05:39:04,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:39:04,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1902 states and 2836 transitions. [2020-10-27 05:39:04,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:39:04,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:39:04,531 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] [2020-10-27 05:39:04,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:39:04,531 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:39:04,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:39:04,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1290431284, now seen corresponding path program 1 times [2020-10-27 05:39:04,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:39:04,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970236563] [2020-10-27 05:39:04,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:39:04,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:04,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:04,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:04,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:04,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:39:04,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:39:04,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-27 05:39:04,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:04,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:39:04,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 05:39:04,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:39:04,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:05,031 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:39:05,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:39:05,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:05,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:05,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:05,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:39:05,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:39:05,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 05:39:05,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:05,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:39:05,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:39:05,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:39:05,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:05,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:39:05,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970236563] [2020-10-27 05:39:05,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:39:05,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:39:05,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651134861] [2020-10-27 05:39:05,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:39:05,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:39:05,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:39:05,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:39:05,082 INFO L87 Difference]: Start difference. First operand 1902 states and 2836 transitions. Second operand 6 states. [2020-10-27 05:39:05,329 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:39:05,917 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-27 05:39:06,159 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-27 05:39:07,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:39:07,151 INFO L93 Difference]: Finished difference Result 6125 states and 9258 transitions. [2020-10-27 05:39:07,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:39:07,151 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-10-27 05:39:07,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:39:07,176 INFO L225 Difference]: With dead ends: 6125 [2020-10-27 05:39:07,176 INFO L226 Difference]: Without dead ends: 4946 [2020-10-27 05:39:07,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:39:07,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4946 states. [2020-10-27 05:39:07,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4946 to 3493. [2020-10-27 05:39:07,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3493 states. [2020-10-27 05:39:07,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3493 states to 3493 states and 5184 transitions. [2020-10-27 05:39:07,683 INFO L78 Accepts]: Start accepts. Automaton has 3493 states and 5184 transitions. Word has length 57 [2020-10-27 05:39:07,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:39:07,684 INFO L481 AbstractCegarLoop]: Abstraction has 3493 states and 5184 transitions. [2020-10-27 05:39:07,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:39:07,684 INFO L276 IsEmpty]: Start isEmpty. Operand 3493 states and 5184 transitions. [2020-10-27 05:39:07,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:39:07,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:39:07,686 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] [2020-10-27 05:39:07,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:39:07,686 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:39:07,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:39:07,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1895897856, now seen corresponding path program 1 times [2020-10-27 05:39:07,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:39:07,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577965545] [2020-10-27 05:39:07,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:39:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:07,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:07,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:07,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:09,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:09,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:39:09,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:39:09,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1821 [2020-10-27 05:39:09,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:09,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:39:09,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:39:09,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 05:39:09,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:10,150 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:39:10,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:39:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:10,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:10,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:10,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:39:10,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:39:10,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:39:10,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:10,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:39:10,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:39:10,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:39:10,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:10,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:39:10,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577965545] [2020-10-27 05:39:10,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:39:10,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:39:10,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786686215] [2020-10-27 05:39:10,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:39:10,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:39:10,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:39:10,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:39:10,211 INFO L87 Difference]: Start difference. First operand 3493 states and 5184 transitions. Second operand 10 states. [2020-10-27 05:39:10,545 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:39:11,848 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-27 05:39:14,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:39:14,080 INFO L93 Difference]: Finished difference Result 11908 states and 17788 transitions. [2020-10-27 05:39:14,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 05:39:14,080 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-10-27 05:39:14,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:39:14,105 INFO L225 Difference]: With dead ends: 11908 [2020-10-27 05:39:14,105 INFO L226 Difference]: Without dead ends: 10869 [2020-10-27 05:39:14,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2020-10-27 05:39:14,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10869 states. [2020-10-27 05:39:14,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10869 to 3497. [2020-10-27 05:39:14,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3497 states. [2020-10-27 05:39:14,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3497 states to 3497 states and 5191 transitions. [2020-10-27 05:39:14,735 INFO L78 Accepts]: Start accepts. Automaton has 3497 states and 5191 transitions. Word has length 59 [2020-10-27 05:39:14,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:39:14,735 INFO L481 AbstractCegarLoop]: Abstraction has 3497 states and 5191 transitions. [2020-10-27 05:39:14,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:39:14,735 INFO L276 IsEmpty]: Start isEmpty. Operand 3497 states and 5191 transitions. [2020-10-27 05:39:14,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:39:14,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:39:14,737 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] [2020-10-27 05:39:14,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:39:14,738 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:39:14,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:39:14,738 INFO L82 PathProgramCache]: Analyzing trace with hash 665941374, now seen corresponding path program 1 times [2020-10-27 05:39:14,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:39:14,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102389219] [2020-10-27 05:39:14,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:39:14,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:14,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:14,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:14,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:16,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:16,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:39:16,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:39:16,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1877 [2020-10-27 05:39:16,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:16,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:39:16,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:39:16,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 05:39:16,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:17,176 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:39:17,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:39:17,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:17,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:17,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:17,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:39:17,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:39:17,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:39:17,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:17,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:39:17,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:39:17,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:39:17,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:39:17,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102389219] [2020-10-27 05:39:17,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:39:17,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:39:17,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774937294] [2020-10-27 05:39:17,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:39:17,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:39:17,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:39:17,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:39:17,223 INFO L87 Difference]: Start difference. First operand 3497 states and 5191 transitions. Second operand 10 states. [2020-10-27 05:39:17,493 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-27 05:39:18,722 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:39:19,184 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-27 05:39:22,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:39:22,676 INFO L93 Difference]: Finished difference Result 17929 states and 27018 transitions. [2020-10-27 05:39:22,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 05:39:22,677 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-10-27 05:39:22,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:39:22,716 INFO L225 Difference]: With dead ends: 17929 [2020-10-27 05:39:22,716 INFO L226 Difference]: Without dead ends: 17352 [2020-10-27 05:39:22,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2020-10-27 05:39:22,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17352 states. [2020-10-27 05:39:23,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17352 to 3470. [2020-10-27 05:39:23,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3470 states. [2020-10-27 05:39:23,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3470 states to 3470 states and 5147 transitions. [2020-10-27 05:39:23,477 INFO L78 Accepts]: Start accepts. Automaton has 3470 states and 5147 transitions. Word has length 59 [2020-10-27 05:39:23,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:39:23,478 INFO L481 AbstractCegarLoop]: Abstraction has 3470 states and 5147 transitions. [2020-10-27 05:39:23,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:39:23,478 INFO L276 IsEmpty]: Start isEmpty. Operand 3470 states and 5147 transitions. [2020-10-27 05:39:23,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 05:39:23,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:39:23,480 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] [2020-10-27 05:39:23,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:39:23,481 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:39:23,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:39:23,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1132402014, now seen corresponding path program 1 times [2020-10-27 05:39:23,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:39:23,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195260264] [2020-10-27 05:39:23,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:39:23,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:23,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:23,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:23,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:25,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:25,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 05:39:25,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:39:25,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1929 [2020-10-27 05:39:25,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:25,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:39:25,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:39:25,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:39:25,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:25,708 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 25 [2020-10-27 05:39:25,951 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:39:25,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:39:25,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:25,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:25,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:25,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:39:25,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:39:25,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:39:25,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:25,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:39:25,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:39:25,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:39:25,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:39:25,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195260264] [2020-10-27 05:39:25,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:39:25,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:39:25,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487061433] [2020-10-27 05:39:25,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:39:25,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:39:25,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:39:25,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:39:25,992 INFO L87 Difference]: Start difference. First operand 3470 states and 5147 transitions. Second operand 10 states. [2020-10-27 05:39:26,246 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 05:39:27,791 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:39:28,149 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 05:39:32,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:39:32,099 INFO L93 Difference]: Finished difference Result 16968 states and 25404 transitions. [2020-10-27 05:39:32,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 05:39:32,099 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-10-27 05:39:32,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:39:32,128 INFO L225 Difference]: With dead ends: 16968 [2020-10-27 05:39:32,128 INFO L226 Difference]: Without dead ends: 13729 [2020-10-27 05:39:32,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2020-10-27 05:39:32,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13729 states. [2020-10-27 05:39:33,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13729 to 6176. [2020-10-27 05:39:33,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6176 states. [2020-10-27 05:39:33,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6176 states to 6176 states and 9216 transitions. [2020-10-27 05:39:33,565 INFO L78 Accepts]: Start accepts. Automaton has 6176 states and 9216 transitions. Word has length 59 [2020-10-27 05:39:33,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:39:33,565 INFO L481 AbstractCegarLoop]: Abstraction has 6176 states and 9216 transitions. [2020-10-27 05:39:33,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:39:33,565 INFO L276 IsEmpty]: Start isEmpty. Operand 6176 states and 9216 transitions. [2020-10-27 05:39:33,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:39:33,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:39:33,568 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] [2020-10-27 05:39:33,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:39:33,569 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:39:33,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:39:33,569 INFO L82 PathProgramCache]: Analyzing trace with hash 2137910112, now seen corresponding path program 1 times [2020-10-27 05:39:33,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:39:33,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621006668] [2020-10-27 05:39:33,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:39:33,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:33,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:33,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:33,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:33,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:35,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:35,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:39:35,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:39:35,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2146 [2020-10-27 05:39:35,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:35,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:39:35,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:39:35,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 05:39:35,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:39:36,115 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:39:36,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:39:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:36,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:36,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:36,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:39:36,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:39:36,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:39:36,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:36,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:39:36,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:39:36,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:39:36,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:36,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:39:36,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621006668] [2020-10-27 05:39:36,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:39:36,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:39:36,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815269790] [2020-10-27 05:39:36,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:39:36,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:39:36,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:39:36,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:39:36,166 INFO L87 Difference]: Start difference. First operand 6176 states and 9216 transitions. Second operand 8 states. [2020-10-27 05:39:36,398 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 05:39:37,185 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 05:39:39,154 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:39:42,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:39:42,195 INFO L93 Difference]: Finished difference Result 25956 states and 38626 transitions. [2020-10-27 05:39:42,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:39:42,195 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-10-27 05:39:42,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:39:42,221 INFO L225 Difference]: With dead ends: 25956 [2020-10-27 05:39:42,221 INFO L226 Difference]: Without dead ends: 20403 [2020-10-27 05:39:42,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:39:42,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20403 states. [2020-10-27 05:39:43,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20403 to 5954. [2020-10-27 05:39:43,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5954 states. [2020-10-27 05:39:43,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5954 states to 5954 states and 8823 transitions. [2020-10-27 05:39:43,845 INFO L78 Accepts]: Start accepts. Automaton has 5954 states and 8823 transitions. Word has length 60 [2020-10-27 05:39:43,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:39:43,845 INFO L481 AbstractCegarLoop]: Abstraction has 5954 states and 8823 transitions. [2020-10-27 05:39:43,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:39:43,845 INFO L276 IsEmpty]: Start isEmpty. Operand 5954 states and 8823 transitions. [2020-10-27 05:39:43,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:39:43,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:39:43,847 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] [2020-10-27 05:39:43,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:39:43,848 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:39:43,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:39:43,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1709447732, now seen corresponding path program 1 times [2020-10-27 05:39:43,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:39:43,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99265591] [2020-10-27 05:39:43,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:39:43,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:43,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:43,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:43,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:43,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:44,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:44,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:45,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:45,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:39:45,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:39:45,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2118 [2020-10-27 05:39:45,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:45,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 05:39:45,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:39:45,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:39:45,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:46,450 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:39:46,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:39:46,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:39:46,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:39:46,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:39:46,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:39:46,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:39:46,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 05:39:46,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:39:46,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:39:46,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:39:46,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:39:46,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:39:46,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:39:46,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99265591] [2020-10-27 05:39:46,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:39:46,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:39:46,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054565276] [2020-10-27 05:39:46,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 05:39:46,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:39:46,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 05:39:46,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 05:39:46,511 INFO L87 Difference]: Start difference. First operand 5954 states and 8823 transitions. Second operand 12 states. [2020-10-27 05:39:47,004 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 142 [2020-10-27 05:39:49,469 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-27 05:39:50,156 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 151 [2020-10-27 05:39:57,283 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 147 [2020-10-27 05:39:57,680 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 05:40:08,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:40:08,765 INFO L93 Difference]: Finished difference Result 56288 states and 81919 transitions. [2020-10-27 05:40:08,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-27 05:40:08,770 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 60 [2020-10-27 05:40:08,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:40:08,842 INFO L225 Difference]: With dead ends: 56288 [2020-10-27 05:40:08,842 INFO L226 Difference]: Without dead ends: 53605 [2020-10-27 05:40:08,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2157 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1022, Invalid=4830, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 05:40:08,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53605 states. [2020-10-27 05:40:10,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53605 to 5997. [2020-10-27 05:40:10,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5997 states. [2020-10-27 05:40:10,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5997 states to 5997 states and 8879 transitions. [2020-10-27 05:40:10,826 INFO L78 Accepts]: Start accepts. Automaton has 5997 states and 8879 transitions. Word has length 60 [2020-10-27 05:40:10,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:40:10,827 INFO L481 AbstractCegarLoop]: Abstraction has 5997 states and 8879 transitions. [2020-10-27 05:40:10,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 05:40:10,827 INFO L276 IsEmpty]: Start isEmpty. Operand 5997 states and 8879 transitions. [2020-10-27 05:40:10,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:40:10,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:40:10,829 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] [2020-10-27 05:40:10,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:40:10,829 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:40:10,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:40:10,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1177201038, now seen corresponding path program 1 times [2020-10-27 05:40:10,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:40:10,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829607125] [2020-10-27 05:40:10,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:40:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:10,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:10,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:10,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:11,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:12,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:12,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:40:12,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:40:12,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2089 [2020-10-27 05:40:12,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:12,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:40:12,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:40:12,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:40:12,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:13,287 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:40:13,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:40:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:13,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:13,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:13,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:40:13,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:40:13,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:40:13,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:13,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:40:13,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:40:13,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:40:13,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:13,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:40:13,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829607125] [2020-10-27 05:40:13,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:40:13,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:40:13,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893701588] [2020-10-27 05:40:13,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:40:13,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:40:13,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:40:13,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:40:13,329 INFO L87 Difference]: Start difference. First operand 5997 states and 8879 transitions. Second operand 8 states. [2020-10-27 05:40:13,562 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 05:40:14,479 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 05:40:17,209 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:40:22,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:40:22,557 INFO L93 Difference]: Finished difference Result 29906 states and 44035 transitions. [2020-10-27 05:40:22,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:40:22,558 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-10-27 05:40:22,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:40:22,586 INFO L225 Difference]: With dead ends: 29906 [2020-10-27 05:40:22,587 INFO L226 Difference]: Without dead ends: 24394 [2020-10-27 05:40:22,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:40:22,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24394 states. [2020-10-27 05:40:24,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24394 to 5916. [2020-10-27 05:40:24,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5916 states. [2020-10-27 05:40:24,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5916 states to 5916 states and 8670 transitions. [2020-10-27 05:40:24,045 INFO L78 Accepts]: Start accepts. Automaton has 5916 states and 8670 transitions. Word has length 60 [2020-10-27 05:40:24,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:40:24,046 INFO L481 AbstractCegarLoop]: Abstraction has 5916 states and 8670 transitions. [2020-10-27 05:40:24,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:40:24,046 INFO L276 IsEmpty]: Start isEmpty. Operand 5916 states and 8670 transitions. [2020-10-27 05:40:24,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 05:40:24,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:40:24,048 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] [2020-10-27 05:40:24,048 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:40:24,049 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:40:24,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:40:24,049 INFO L82 PathProgramCache]: Analyzing trace with hash -332720856, now seen corresponding path program 1 times [2020-10-27 05:40:24,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:40:24,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974705587] [2020-10-27 05:40:24,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:40:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:24,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:24,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:24,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:24,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:25,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:25,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 05:40:25,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:40:25,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1660 [2020-10-27 05:40:25,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:25,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:40:25,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:40:25,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 05:40:25,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:25,989 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:40:25,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:40:26,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:26,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:26,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:26,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:40:26,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:40:26,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 05:40:26,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:26,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:40:26,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:40:26,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:40:26,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:26,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:40:26,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974705587] [2020-10-27 05:40:26,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:40:26,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:40:26,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248512661] [2020-10-27 05:40:26,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:40:26,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:40:26,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:40:26,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:40:26,037 INFO L87 Difference]: Start difference. First operand 5916 states and 8670 transitions. Second operand 8 states. [2020-10-27 05:40:26,288 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:40:27,265 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:40:29,573 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 05:40:32,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:40:32,790 INFO L93 Difference]: Finished difference Result 20364 states and 29730 transitions. [2020-10-27 05:40:32,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:40:32,791 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-10-27 05:40:32,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:40:32,810 INFO L225 Difference]: With dead ends: 20364 [2020-10-27 05:40:32,810 INFO L226 Difference]: Without dead ends: 18550 [2020-10-27 05:40:32,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:40:32,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18550 states. [2020-10-27 05:40:34,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18550 to 5936. [2020-10-27 05:40:34,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5936 states. [2020-10-27 05:40:34,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5936 states to 5936 states and 8696 transitions. [2020-10-27 05:40:34,380 INFO L78 Accepts]: Start accepts. Automaton has 5936 states and 8696 transitions. Word has length 60 [2020-10-27 05:40:34,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:40:34,380 INFO L481 AbstractCegarLoop]: Abstraction has 5936 states and 8696 transitions. [2020-10-27 05:40:34,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:40:34,380 INFO L276 IsEmpty]: Start isEmpty. Operand 5936 states and 8696 transitions. [2020-10-27 05:40:34,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 05:40:34,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:40:34,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:40:34,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:40:34,384 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:40:34,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:40:34,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1453857243, now seen corresponding path program 1 times [2020-10-27 05:40:34,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:40:34,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197930355] [2020-10-27 05:40:34,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:40:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:34,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:34,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:34,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:35,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:35,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 05:40:35,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:40:35,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 600 [2020-10-27 05:40:35,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:35,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:40:35,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:40:35,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 05:40:35,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:35,277 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2020-10-27 05:40:35,539 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:40:35,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:40:35,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:35,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:35,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:35,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:40:35,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:40:35,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:40:35,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:35,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:40:35,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:40:35,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:40:35,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:35,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:40:35,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197930355] [2020-10-27 05:40:35,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:40:35,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:40:35,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690856318] [2020-10-27 05:40:35,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:40:35,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:40:35,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:40:35,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:40:35,574 INFO L87 Difference]: Start difference. First operand 5936 states and 8696 transitions. Second operand 10 states. [2020-10-27 05:40:35,901 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-27 05:40:37,921 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-27 05:40:38,153 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-27 05:40:48,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:40:48,144 INFO L93 Difference]: Finished difference Result 32917 states and 48961 transitions. [2020-10-27 05:40:48,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 05:40:48,146 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 63 [2020-10-27 05:40:48,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:40:48,331 INFO L225 Difference]: With dead ends: 32917 [2020-10-27 05:40:48,331 INFO L226 Difference]: Without dead ends: 30294 [2020-10-27 05:40:48,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-27 05:40:48,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30294 states. [2020-10-27 05:40:49,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30294 to 5692. [2020-10-27 05:40:49,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5692 states. [2020-10-27 05:40:49,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5692 states to 5692 states and 8353 transitions. [2020-10-27 05:40:49,999 INFO L78 Accepts]: Start accepts. Automaton has 5692 states and 8353 transitions. Word has length 63 [2020-10-27 05:40:49,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:40:49,999 INFO L481 AbstractCegarLoop]: Abstraction has 5692 states and 8353 transitions. [2020-10-27 05:40:49,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:40:49,999 INFO L276 IsEmpty]: Start isEmpty. Operand 5692 states and 8353 transitions. [2020-10-27 05:40:50,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 05:40:50,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:40:50,002 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:40:50,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:40:50,002 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:40:50,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:40:50,003 INFO L82 PathProgramCache]: Analyzing trace with hash 783239293, now seen corresponding path program 1 times [2020-10-27 05:40:50,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:40:50,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840230240] [2020-10-27 05:40:50,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:40:50,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:50,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:50,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:50,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:50,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:51,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:51,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 05:40:51,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:40:51,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1012 [2020-10-27 05:40:51,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:51,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:40:51,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:40:51,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 05:40:51,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:51,309 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-27 05:40:51,538 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:40:51,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:40:51,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:40:51,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:40:51,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:40:51,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:40:51,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:40:51,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 05:40:51,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:40:51,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:40:51,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:40:51,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:40:51,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:40:51,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:40:51,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840230240] [2020-10-27 05:40:51,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:40:51,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:40:51,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138372009] [2020-10-27 05:40:51,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:40:51,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:40:51,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:40:51,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:40:51,564 INFO L87 Difference]: Start difference. First operand 5692 states and 8353 transitions. Second operand 10 states. [2020-10-27 05:40:51,903 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 05:40:55,231 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:40:55,990 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2020-10-27 05:41:01,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:41:01,170 INFO L93 Difference]: Finished difference Result 27409 states and 40818 transitions. [2020-10-27 05:41:01,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:41:01,171 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 63 [2020-10-27 05:41:01,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:41:01,196 INFO L225 Difference]: With dead ends: 27409 [2020-10-27 05:41:01,196 INFO L226 Difference]: Without dead ends: 22758 [2020-10-27 05:41:01,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:41:01,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22758 states. [2020-10-27 05:41:04,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22758 to 11432. [2020-10-27 05:41:04,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11432 states. [2020-10-27 05:41:04,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11432 states to 11432 states and 16975 transitions. [2020-10-27 05:41:04,855 INFO L78 Accepts]: Start accepts. Automaton has 11432 states and 16975 transitions. Word has length 63 [2020-10-27 05:41:04,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:41:04,855 INFO L481 AbstractCegarLoop]: Abstraction has 11432 states and 16975 transitions. [2020-10-27 05:41:04,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:41:04,855 INFO L276 IsEmpty]: Start isEmpty. Operand 11432 states and 16975 transitions. [2020-10-27 05:41:04,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 05:41:04,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:41:04,862 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] [2020-10-27 05:41:04,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 05:41:04,862 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:41:04,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:41:04,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1238862286, now seen corresponding path program 1 times [2020-10-27 05:41:04,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:41:04,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822915875] [2020-10-27 05:41:04,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:41:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:04,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:04,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:04,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:05,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:05,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:05,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:06,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:06,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 05:41:06,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:41:06,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1651 [2020-10-27 05:41:06,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:06,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:41:06,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:41:06,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:41:06,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:06,769 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:41:06,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:41:06,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:06,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:06,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:06,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:41:06,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:41:06,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 05:41:06,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:06,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:41:06,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:41:06,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:41:06,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:06,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:41:06,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822915875] [2020-10-27 05:41:06,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:41:06,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:41:06,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368041569] [2020-10-27 05:41:06,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:41:06,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:41:06,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:41:06,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:41:06,802 INFO L87 Difference]: Start difference. First operand 11432 states and 16975 transitions. Second operand 6 states. [2020-10-27 05:41:09,408 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:41:09,654 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 05:41:09,931 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-27 05:41:14,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:41:14,243 INFO L93 Difference]: Finished difference Result 27216 states and 40540 transitions. [2020-10-27 05:41:14,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:41:14,244 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-27 05:41:14,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:41:14,261 INFO L225 Difference]: With dead ends: 27216 [2020-10-27 05:41:14,261 INFO L226 Difference]: Without dead ends: 17256 [2020-10-27 05:41:14,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:41:14,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17256 states. [2020-10-27 05:41:18,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17256 to 12025. [2020-10-27 05:41:18,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12025 states. [2020-10-27 05:41:18,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12025 states to 12025 states and 17609 transitions. [2020-10-27 05:41:18,217 INFO L78 Accepts]: Start accepts. Automaton has 12025 states and 17609 transitions. Word has length 75 [2020-10-27 05:41:18,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:41:18,217 INFO L481 AbstractCegarLoop]: Abstraction has 12025 states and 17609 transitions. [2020-10-27 05:41:18,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:41:18,217 INFO L276 IsEmpty]: Start isEmpty. Operand 12025 states and 17609 transitions. [2020-10-27 05:41:18,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 05:41:18,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:41:18,223 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] [2020-10-27 05:41:18,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 05:41:18,223 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:41:18,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:41:18,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1422021410, now seen corresponding path program 1 times [2020-10-27 05:41:18,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:41:18,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714855923] [2020-10-27 05:41:18,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:41:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:18,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:18,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:18,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:19,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:20,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:20,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 05:41:20,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:41:20,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2234 [2020-10-27 05:41:20,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:20,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:41:20,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:41:20,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 05:41:20,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:20,905 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:41:20,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:41:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:20,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:20,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:20,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:41:20,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:41:20,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:41:20,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:20,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:41:20,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:41:20,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:41:20,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:41:20,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714855923] [2020-10-27 05:41:20,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:41:20,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-27 05:41:20,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657059593] [2020-10-27 05:41:20,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:41:20,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:41:20,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:41:20,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:41:20,939 INFO L87 Difference]: Start difference. First operand 12025 states and 17609 transitions. Second operand 11 states. [2020-10-27 05:41:21,188 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-27 05:41:26,593 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-10-27 05:41:27,033 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-27 05:41:28,181 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-27 05:41:40,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:41:40,265 INFO L93 Difference]: Finished difference Result 56593 states and 82803 transitions. [2020-10-27 05:41:40,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 05:41:40,265 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 75 [2020-10-27 05:41:40,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:41:40,321 INFO L225 Difference]: With dead ends: 56593 [2020-10-27 05:41:40,321 INFO L226 Difference]: Without dead ends: 44762 [2020-10-27 05:41:40,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2020-10-27 05:41:40,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44762 states. [2020-10-27 05:41:45,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44762 to 14412. [2020-10-27 05:41:45,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14412 states. [2020-10-27 05:41:45,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14412 states to 14412 states and 21088 transitions. [2020-10-27 05:41:45,787 INFO L78 Accepts]: Start accepts. Automaton has 14412 states and 21088 transitions. Word has length 75 [2020-10-27 05:41:45,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:41:45,787 INFO L481 AbstractCegarLoop]: Abstraction has 14412 states and 21088 transitions. [2020-10-27 05:41:45,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:41:45,787 INFO L276 IsEmpty]: Start isEmpty. Operand 14412 states and 21088 transitions. [2020-10-27 05:41:45,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 05:41:45,793 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:41:45,793 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] [2020-10-27 05:41:45,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 05:41:45,793 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:41:45,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:41:45,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1661637810, now seen corresponding path program 1 times [2020-10-27 05:41:45,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:41:45,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838186335] [2020-10-27 05:41:45,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:41:45,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:45,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:45,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:45,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:46,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:46,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 05:41:46,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:41:46,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 395 [2020-10-27 05:41:46,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:46,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:41:46,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 05:41:46,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 05:41:46,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:46,442 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:41:46,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:41:46,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:41:46,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:41:46,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:41:46,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:41:46,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:41:46,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:41:46,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:41:46,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:41:46,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:41:46,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:41:46,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:41:46,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:41:46,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838186335] [2020-10-27 05:41:46,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:41:46,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:41:46,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791774934] [2020-10-27 05:41:46,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:41:46,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:41:46,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:41:46,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:41:46,475 INFO L87 Difference]: Start difference. First operand 14412 states and 21088 transitions. Second operand 4 states. [2020-10-27 05:41:46,712 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 141 [2020-10-27 05:41:57,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:41:57,068 INFO L93 Difference]: Finished difference Result 40014 states and 58396 transitions. [2020-10-27 05:41:57,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:41:57,069 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-27 05:41:57,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:41:57,100 INFO L225 Difference]: With dead ends: 40014 [2020-10-27 05:41:57,100 INFO L226 Difference]: Without dead ends: 26447 [2020-10-27 05:41:57,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:41:57,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26447 states. [2020-10-27 05:42:05,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26447 to 24296. [2020-10-27 05:42:05,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24296 states. [2020-10-27 05:42:05,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24296 states to 24296 states and 35246 transitions. [2020-10-27 05:42:05,999 INFO L78 Accepts]: Start accepts. Automaton has 24296 states and 35246 transitions. Word has length 75 [2020-10-27 05:42:06,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:42:06,000 INFO L481 AbstractCegarLoop]: Abstraction has 24296 states and 35246 transitions. [2020-10-27 05:42:06,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:42:06,000 INFO L276 IsEmpty]: Start isEmpty. Operand 24296 states and 35246 transitions. [2020-10-27 05:42:06,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 05:42:06,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:42:06,004 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] [2020-10-27 05:42:06,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 05:42:06,005 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:42:06,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:42:06,005 INFO L82 PathProgramCache]: Analyzing trace with hash -762527564, now seen corresponding path program 1 times [2020-10-27 05:42:06,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:42:06,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571251072] [2020-10-27 05:42:06,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:42:06,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:42:06,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:06,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:06,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:06,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:06,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:06,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:06,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:07,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:42:07,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 05:42:07,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:42:07,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1355 [2020-10-27 05:42:07,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:42:07,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:42:07,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:42:07,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 05:42:07,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:42:07,621 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:42:07,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:42:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:42:07,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:42:07,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:42:07,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:42:07,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:42:07,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:42:07,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:42:07,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:42:07,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:42:07,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:42:07,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:42:07,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:42:07,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571251072] [2020-10-27 05:42:07,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:42:07,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:42:07,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116318012] [2020-10-27 05:42:07,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:42:07,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:42:07,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:42:07,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:42:07,663 INFO L87 Difference]: Start difference. First operand 24296 states and 35246 transitions. Second operand 6 states.