/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:56:43,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:56:43,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:56:43,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:56:43,536 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:56:43,537 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:56:43,539 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:56:43,542 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:56:43,544 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:56:43,546 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:56:43,547 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:56:43,549 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:56:43,549 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:56:43,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:56:43,552 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:56:43,554 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:56:43,555 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:56:43,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:56:43,559 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:56:43,562 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:56:43,564 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:56:43,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:56:43,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:56:43,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:56:43,593 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:56:43,594 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:56:43,595 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:56:43,596 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:56:43,597 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:56:43,598 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:56:43,598 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:56:43,599 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:56:43,600 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:56:43,601 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:56:43,603 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:56:43,603 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:56:43,604 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:56:43,604 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:56:43,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:56:43,606 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:56:43,607 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:56:43,610 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 05:56:43,638 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:56:43,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:56:43,640 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:56:43,641 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:56:43,641 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:56:43,641 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:56:43,642 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:56:43,642 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:56:43,642 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:56:43,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:56:43,643 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:56:43,643 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:56:43,643 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:56:43,643 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:56:43,644 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:56:43,644 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:56:43,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:56:43,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:56:43,645 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:56:43,645 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:56:43,645 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:56:43,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:56:43,646 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:56:43,646 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:56:43,646 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:56:43,646 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:56:43,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:56:43,647 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:56:43,647 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:56:43,647 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:56:44,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:56:44,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:56:44,086 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:56:44,088 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:56:44,089 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:56:44,091 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-27 05:56:44,173 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e7b85bb30/e30ad579bf55422bb4e59cdf3036e25f/FLAGc10936ffb [2020-10-27 05:56:44,897 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:56:44,897 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-27 05:56:44,928 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e7b85bb30/e30ad579bf55422bb4e59cdf3036e25f/FLAGc10936ffb [2020-10-27 05:56:45,150 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e7b85bb30/e30ad579bf55422bb4e59cdf3036e25f [2020-10-27 05:56:45,154 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:56:45,160 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:56:45,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:56:45,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:56:45,167 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:56:45,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:56:45" (1/1) ... [2020-10-27 05:56:45,171 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c15b07d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:56:45, skipping insertion in model container [2020-10-27 05:56:45,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:56:45" (1/1) ... [2020-10-27 05:56:45,182 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:56:45,291 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:56:45,906 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:56:45,934 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:56:46,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:56:46,182 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:56:46,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:56:46 WrapperNode [2020-10-27 05:56:46,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:56:46,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:56:46,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:56:46,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:56:46,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:56:46" (1/1) ... [2020-10-27 05:56:46,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:56:46" (1/1) ... [2020-10-27 05:56:46,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:56:46" (1/1) ... [2020-10-27 05:56:46,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:56:46" (1/1) ... [2020-10-27 05:56:46,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:56:46" (1/1) ... [2020-10-27 05:56:46,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:56:46" (1/1) ... [2020-10-27 05:56:46,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:56:46" (1/1) ... [2020-10-27 05:56:46,326 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:56:46,327 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:56:46,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:56:46,328 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:56:46,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:56:46" (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 05:56:46,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:56:46,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:56:46,422 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:56:46,422 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:56:46,422 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:56:46,423 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:56:46,423 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:56:46,423 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:56:46,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:56:46,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:56:46,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:56:46,424 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:56:46,424 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:56:46,424 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:56:46,424 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:56:46,424 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:56:46,425 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:56:46,425 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:56:46,425 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:56:46,425 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:56:46,425 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:56:46,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:56:46,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:56:46,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:56:46,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:56:46,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:56:46,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:56:48,618 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:56:48,618 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:56:48,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:56:48 BoogieIcfgContainer [2020-10-27 05:56:48,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:56:48,623 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:56:48,623 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:56:48,627 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:56:48,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:56:45" (1/3) ... [2020-10-27 05:56:48,628 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7191d01b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:56:48, skipping insertion in model container [2020-10-27 05:56:48,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:56:46" (2/3) ... [2020-10-27 05:56:48,629 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7191d01b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:56:48, skipping insertion in model container [2020-10-27 05:56:48,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:56:48" (3/3) ... [2020-10-27 05:56:48,631 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.3.ufo.BOUNDED-6.pals.c.v+lhb-reducer.c [2020-10-27 05:56:48,644 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:56:48,649 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:56:48,664 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:56:48,697 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:56:48,698 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:56:48,698 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:56:48,698 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:56:48,698 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:56:48,698 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:56:48,698 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:56:48,699 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:56:48,728 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states. [2020-10-27 05:56:48,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-27 05:56:48,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:56:48,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:56:48,749 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:56:48,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:56:48,756 INFO L82 PathProgramCache]: Analyzing trace with hash 685556332, now seen corresponding path program 1 times [2020-10-27 05:56:48,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:56:48,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883436158] [2020-10-27 05:56:48,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:56:49,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:49,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:49,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:50,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:50,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:50,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:50,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:50,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:50,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:51,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:51,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:52,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:54,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:54,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-27 05:56:54,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:56:54,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-27 05:56:54,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:54,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:56:54,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:56:54,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 05:56:54,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 05:56:55,330 WARN L193 SmtUtils]: Spent 736.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 05:56:55,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:56:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:56:55,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:56:55,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:56:55,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:56:55,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:56:55,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 05:56:55,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:56:55,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:56:55,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:56:55,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:56:55,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:56:55,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:56:55,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883436158] [2020-10-27 05:56:55,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:56:55,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:56:55,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333991868] [2020-10-27 05:56:55,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:56:55,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:56:55,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:56:55,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:56:55,532 INFO L87 Difference]: Start difference. First operand 422 states. Second operand 5 states. [2020-10-27 05:56:59,297 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2020-10-27 05:57:00,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:57:00,947 INFO L93 Difference]: Finished difference Result 1195 states and 2141 transitions. [2020-10-27 05:57:00,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 05:57:00,951 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 153 [2020-10-27 05:57:00,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:57:01,009 INFO L225 Difference]: With dead ends: 1195 [2020-10-27 05:57:01,009 INFO L226 Difference]: Without dead ends: 786 [2020-10-27 05:57:01,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:57:01,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2020-10-27 05:57:01,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 763. [2020-10-27 05:57:01,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 763 states. [2020-10-27 05:57:01,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 1099 transitions. [2020-10-27 05:57:01,173 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 1099 transitions. Word has length 153 [2020-10-27 05:57:01,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:57:01,174 INFO L481 AbstractCegarLoop]: Abstraction has 763 states and 1099 transitions. [2020-10-27 05:57:01,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:57:01,175 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 1099 transitions. [2020-10-27 05:57:01,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-27 05:57:01,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:57:01,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:57:01,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:57:01,182 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:57:01,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:57:01,183 INFO L82 PathProgramCache]: Analyzing trace with hash 539856667, now seen corresponding path program 1 times [2020-10-27 05:57:01,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:57:01,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235255324] [2020-10-27 05:57:01,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:57:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:01,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:01,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:01,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:01,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:01,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:01,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:02,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:02,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:02,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:02,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:03,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:03,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:06,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:06,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-27 05:57:06,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:57:06,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:57:06,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:06,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:57:06,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:57:06,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 05:57:06,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:06,803 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 05:57:06,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:57:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:06,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:06,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:06,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:57:06,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:57:06,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:57:06,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:06,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:57:06,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:57:06,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:57:06,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:06,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:57:06,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235255324] [2020-10-27 05:57:06,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:57:06,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:57:06,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379634637] [2020-10-27 05:57:06,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:57:06,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:57:06,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:57:06,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:57:06,918 INFO L87 Difference]: Start difference. First operand 763 states and 1099 transitions. Second operand 5 states. [2020-10-27 05:57:10,110 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2020-10-27 05:57:11,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:57:11,541 INFO L93 Difference]: Finished difference Result 2228 states and 3200 transitions. [2020-10-27 05:57:11,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:57:11,542 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 154 [2020-10-27 05:57:11,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:57:11,552 INFO L225 Difference]: With dead ends: 2228 [2020-10-27 05:57:11,552 INFO L226 Difference]: Without dead ends: 1478 [2020-10-27 05:57:11,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:57:11,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2020-10-27 05:57:11,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1455. [2020-10-27 05:57:11,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1455 states. [2020-10-27 05:57:11,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 2076 transitions. [2020-10-27 05:57:11,637 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 2076 transitions. Word has length 154 [2020-10-27 05:57:11,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:57:11,637 INFO L481 AbstractCegarLoop]: Abstraction has 1455 states and 2076 transitions. [2020-10-27 05:57:11,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:57:11,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 2076 transitions. [2020-10-27 05:57:11,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-27 05:57:11,642 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:57:11,643 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:57:11,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:57:11,643 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:57:11,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:57:11,644 INFO L82 PathProgramCache]: Analyzing trace with hash -489639670, now seen corresponding path program 1 times [2020-10-27 05:57:11,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:57:11,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975768596] [2020-10-27 05:57:11,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:57:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:11,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:11,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:11,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:11,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:11,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:12,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:12,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:12,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:12,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:16,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:16,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-27 05:57:16,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:57:16,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-27 05:57:16,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:16,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:57:16,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:57:16,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 05:57:16,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:17,232 WARN L193 SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 05:57:17,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:57:17,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:17,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:17,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:17,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:57:17,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:57:17,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:57:17,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:17,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:57:17,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:57:17,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:57:17,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:17,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:57:17,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975768596] [2020-10-27 05:57:17,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:57:17,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:57:17,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578995142] [2020-10-27 05:57:17,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:57:17,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:57:17,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:57:17,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:57:17,335 INFO L87 Difference]: Start difference. First operand 1455 states and 2076 transitions. Second operand 5 states. [2020-10-27 05:57:20,177 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2020-10-27 05:57:21,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:57:21,534 INFO L93 Difference]: Finished difference Result 4224 states and 5998 transitions. [2020-10-27 05:57:21,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:57:21,535 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 155 [2020-10-27 05:57:21,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:57:21,552 INFO L225 Difference]: With dead ends: 4224 [2020-10-27 05:57:21,552 INFO L226 Difference]: Without dead ends: 2800 [2020-10-27 05:57:21,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:57:21,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2800 states. [2020-10-27 05:57:21,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2800 to 2782. [2020-10-27 05:57:21,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2782 states. [2020-10-27 05:57:21,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2782 states to 2782 states and 3914 transitions. [2020-10-27 05:57:21,689 INFO L78 Accepts]: Start accepts. Automaton has 2782 states and 3914 transitions. Word has length 155 [2020-10-27 05:57:21,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:57:21,690 INFO L481 AbstractCegarLoop]: Abstraction has 2782 states and 3914 transitions. [2020-10-27 05:57:21,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:57:21,690 INFO L276 IsEmpty]: Start isEmpty. Operand 2782 states and 3914 transitions. [2020-10-27 05:57:21,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-27 05:57:21,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:57:21,696 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:57:21,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:57:21,697 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:57:21,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:57:21,697 INFO L82 PathProgramCache]: Analyzing trace with hash 841863708, now seen corresponding path program 1 times [2020-10-27 05:57:21,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:57:21,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888070735] [2020-10-27 05:57:21,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:57:21,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:21,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:21,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:21,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:21,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:22,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:22,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:22,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:22,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:26,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:26,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-27 05:57:26,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:57:26,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 05:57:26,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:26,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:57:26,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:57:26,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 05:57:26,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:57:27,472 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 05:57:27,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:57:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:27,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:27,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:27,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:57:27,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:57:27,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 05:57:27,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:27,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:57:27,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:57:27,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:57:27,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:27,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:57:27,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888070735] [2020-10-27 05:57:27,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:57:27,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:57:27,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14459339] [2020-10-27 05:57:27,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:57:27,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:57:27,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:57:27,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:57:27,593 INFO L87 Difference]: Start difference. First operand 2782 states and 3914 transitions. Second operand 5 states. [2020-10-27 05:57:30,668 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2020-10-27 05:57:32,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:57:32,289 INFO L93 Difference]: Finished difference Result 7508 states and 10594 transitions. [2020-10-27 05:57:32,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:57:32,290 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 156 [2020-10-27 05:57:32,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:57:32,319 INFO L225 Difference]: With dead ends: 7508 [2020-10-27 05:57:32,319 INFO L226 Difference]: Without dead ends: 5345 [2020-10-27 05:57:32,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:57:32,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5345 states. [2020-10-27 05:57:32,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5345 to 5318. [2020-10-27 05:57:32,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5318 states. [2020-10-27 05:57:32,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5318 states to 5318 states and 7392 transitions. [2020-10-27 05:57:32,665 INFO L78 Accepts]: Start accepts. Automaton has 5318 states and 7392 transitions. Word has length 156 [2020-10-27 05:57:32,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:57:32,667 INFO L481 AbstractCegarLoop]: Abstraction has 5318 states and 7392 transitions. [2020-10-27 05:57:32,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:57:32,667 INFO L276 IsEmpty]: Start isEmpty. Operand 5318 states and 7392 transitions. [2020-10-27 05:57:32,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-27 05:57:32,676 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:57:32,676 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:57:32,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:57:32,677 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:57:32,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:57:32,678 INFO L82 PathProgramCache]: Analyzing trace with hash 2022935785, now seen corresponding path program 1 times [2020-10-27 05:57:32,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:57:32,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169577115] [2020-10-27 05:57:32,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:57:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:32,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:32,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:32,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:32,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:32,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:33,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:33,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:37,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:37,736 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-27 05:57:37,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:57:37,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 05:57:37,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:37,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:57:37,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:57:37,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 05:57:37,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:38,243 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 05:57:38,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:57:38,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:38,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:38,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:38,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:57:38,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:57:38,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:57:38,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:38,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:57:38,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:57:38,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:57:38,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:57:38,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169577115] [2020-10-27 05:57:38,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:57:38,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:57:38,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998466168] [2020-10-27 05:57:38,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:57:38,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:57:38,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:57:38,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:57:38,333 INFO L87 Difference]: Start difference. First operand 5318 states and 7392 transitions. Second operand 5 states. [2020-10-27 05:57:41,242 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2020-10-27 05:57:42,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:57:42,757 INFO L93 Difference]: Finished difference Result 15501 states and 21431 transitions. [2020-10-27 05:57:42,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:57:42,763 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 157 [2020-10-27 05:57:42,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:57:42,808 INFO L225 Difference]: With dead ends: 15501 [2020-10-27 05:57:42,808 INFO L226 Difference]: Without dead ends: 10286 [2020-10-27 05:57:42,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:57:42,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10286 states. [2020-10-27 05:57:43,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10286 to 10259. [2020-10-27 05:57:43,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10259 states. [2020-10-27 05:57:43,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10259 states to 10259 states and 14025 transitions. [2020-10-27 05:57:43,407 INFO L78 Accepts]: Start accepts. Automaton has 10259 states and 14025 transitions. Word has length 157 [2020-10-27 05:57:43,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:57:43,409 INFO L481 AbstractCegarLoop]: Abstraction has 10259 states and 14025 transitions. [2020-10-27 05:57:43,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:57:43,409 INFO L276 IsEmpty]: Start isEmpty. Operand 10259 states and 14025 transitions. [2020-10-27 05:57:43,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-27 05:57:43,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:57:43,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:57:43,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:57:43,435 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:57:43,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:57:43,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1005334811, now seen corresponding path program 1 times [2020-10-27 05:57:43,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:57:43,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865401316] [2020-10-27 05:57:43,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:57:43,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:43,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:43,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:43,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:43,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:43,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:43,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:43,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:43,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:48,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:48,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-27 05:57:48,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:57:48,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-27 05:57:48,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:48,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:57:48,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:57:48,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 05:57:48,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:49,099 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 05:57:49,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:57:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:49,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:49,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:57:49,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:57:49,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:57:49,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:57:49,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:57:49,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:57:49,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:57:49,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:57:49,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:57:49,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:57:49,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865401316] [2020-10-27 05:57:49,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:57:49,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:57:49,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131786678] [2020-10-27 05:57:49,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:57:49,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:57:49,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:57:49,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:57:49,214 INFO L87 Difference]: Start difference. First operand 10259 states and 14025 transitions. Second operand 5 states. [2020-10-27 05:57:52,773 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2020-10-27 05:57:54,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:57:54,621 INFO L93 Difference]: Finished difference Result 28766 states and 39341 transitions. [2020-10-27 05:57:54,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:57:54,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 158 [2020-10-27 05:57:54,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:57:54,676 INFO L225 Difference]: With dead ends: 28766 [2020-10-27 05:57:54,677 INFO L226 Difference]: Without dead ends: 19787 [2020-10-27 05:57:54,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 05:57:54,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19787 states. [2020-10-27 05:57:55,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19787 to 19766. [2020-10-27 05:57:55,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19766 states. [2020-10-27 05:57:55,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19766 states to 19766 states and 26552 transitions. [2020-10-27 05:57:55,667 INFO L78 Accepts]: Start accepts. Automaton has 19766 states and 26552 transitions. Word has length 158 [2020-10-27 05:57:55,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:57:55,667 INFO L481 AbstractCegarLoop]: Abstraction has 19766 states and 26552 transitions. [2020-10-27 05:57:55,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:57:55,667 INFO L276 IsEmpty]: Start isEmpty. Operand 19766 states and 26552 transitions. [2020-10-27 05:57:55,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-27 05:57:55,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:57:55,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:57:55,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:57:55,700 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:57:55,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:57:55,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1304687209, now seen corresponding path program 1 times [2020-10-27 05:57:55,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:57:55,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846470355] [2020-10-27 05:57:55,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:57:55,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:57:55,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:55,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:55,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:55,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:55,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:56,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:57:56,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:00,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:00,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-27 05:58:00,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:58:00,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 05:58:00,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:00,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:58:00,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:58:00,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 05:58:00,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:01,285 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 05:58:01,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:58:01,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:01,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:01,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:01,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:58:01,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:58:01,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:58:01,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:01,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:58:01,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:58:01,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:58:01,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:01,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:58:01,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846470355] [2020-10-27 05:58:01,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:58:01,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:58:01,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520667809] [2020-10-27 05:58:01,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:58:01,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:58:01,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:58:01,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:58:01,362 INFO L87 Difference]: Start difference. First operand 19766 states and 26552 transitions. Second operand 5 states. [2020-10-27 05:58:04,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:58:04,260 INFO L93 Difference]: Finished difference Result 32434 states and 43542 transitions. [2020-10-27 05:58:04,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:58:04,261 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 159 [2020-10-27 05:58:04,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:58:04,289 INFO L225 Difference]: With dead ends: 32434 [2020-10-27 05:58:04,290 INFO L226 Difference]: Without dead ends: 12757 [2020-10-27 05:58:04,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:58:04,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12757 states. [2020-10-27 05:58:05,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12757 to 12757. [2020-10-27 05:58:05,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12757 states. [2020-10-27 05:58:05,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12757 states to 12757 states and 17107 transitions. [2020-10-27 05:58:05,074 INFO L78 Accepts]: Start accepts. Automaton has 12757 states and 17107 transitions. Word has length 159 [2020-10-27 05:58:05,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:58:05,075 INFO L481 AbstractCegarLoop]: Abstraction has 12757 states and 17107 transitions. [2020-10-27 05:58:05,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:58:05,075 INFO L276 IsEmpty]: Start isEmpty. Operand 12757 states and 17107 transitions. [2020-10-27 05:58:05,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-27 05:58:05,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:58:05,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:58:05,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:58:05,093 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:58:05,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:58:05,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1311618714, now seen corresponding path program 1 times [2020-10-27 05:58:05,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:58:05,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218887241] [2020-10-27 05:58:05,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:58:05,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:05,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:05,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:05,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:05,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:05,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:05,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:05,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:05,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:10,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:10,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-27 05:58:10,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 05:58:10,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:58:10,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:10,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:58:10,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:58:10,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-27 05:58:10,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:10,712 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 05:58:10,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:58:10,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:10,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:10,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:10,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:58:10,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:58:10,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 05:58:10,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:10,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:58:10,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:58:10,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:58:10,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:10,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:58:10,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218887241] [2020-10-27 05:58:10,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:58:10,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:58:10,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006231802] [2020-10-27 05:58:10,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:58:10,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:58:10,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:58:10,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:58:10,792 INFO L87 Difference]: Start difference. First operand 12757 states and 17107 transitions. Second operand 9 states. [2020-10-27 05:58:11,328 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2020-10-27 05:58:14,598 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification that was a NOOP. DAG size: 244 [2020-10-27 05:58:15,133 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 242 [2020-10-27 05:58:17,084 WARN L193 SmtUtils]: Spent 553.00 ms on a formula simplification that was a NOOP. DAG size: 242 [2020-10-27 05:58:17,607 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 240 [2020-10-27 05:58:18,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:58:18,233 INFO L93 Difference]: Finished difference Result 40979 states and 57423 transitions. [2020-10-27 05:58:18,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 05:58:18,233 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 163 [2020-10-27 05:58:18,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:58:18,287 INFO L225 Difference]: With dead ends: 40979 [2020-10-27 05:58:18,287 INFO L226 Difference]: Without dead ends: 31258 [2020-10-27 05:58:18,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2020-10-27 05:58:18,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31258 states. [2020-10-27 05:58:19,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31258 to 18677. [2020-10-27 05:58:19,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18677 states. [2020-10-27 05:58:19,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18677 states to 18677 states and 25211 transitions. [2020-10-27 05:58:19,660 INFO L78 Accepts]: Start accepts. Automaton has 18677 states and 25211 transitions. Word has length 163 [2020-10-27 05:58:19,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:58:19,661 INFO L481 AbstractCegarLoop]: Abstraction has 18677 states and 25211 transitions. [2020-10-27 05:58:19,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:58:19,661 INFO L276 IsEmpty]: Start isEmpty. Operand 18677 states and 25211 transitions. [2020-10-27 05:58:19,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-27 05:58:19,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:58:19,682 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:58:19,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:58:19,682 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:58:19,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:58:19,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1369951575, now seen corresponding path program 1 times [2020-10-27 05:58:19,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:58:19,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659996428] [2020-10-27 05:58:19,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:58:19,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:19,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:19,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:19,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:19,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:19,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:20,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:20,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:24,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:24,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-27 05:58:24,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:58:24,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:58:24,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:24,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:58:24,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 05:58:24,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 05:58:24,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:25,222 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 05:58:25,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:58:25,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:25,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:25,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:25,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:58:25,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:58:25,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 05:58:25,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:25,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:58:25,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:58:25,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:58:25,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:25,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:58:25,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659996428] [2020-10-27 05:58:25,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:58:25,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:58:25,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122591671] [2020-10-27 05:58:25,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:58:25,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:58:25,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:58:25,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:58:25,277 INFO L87 Difference]: Start difference. First operand 18677 states and 25211 transitions. Second operand 5 states. [2020-10-27 05:58:28,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:58:28,060 INFO L93 Difference]: Finished difference Result 33319 states and 44996 transitions. [2020-10-27 05:58:28,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:58:28,061 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 163 [2020-10-27 05:58:28,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:58:28,084 INFO L225 Difference]: With dead ends: 33319 [2020-10-27 05:58:28,084 INFO L226 Difference]: Without dead ends: 14975 [2020-10-27 05:58:28,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:58:28,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14975 states. [2020-10-27 05:58:29,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14975 to 14975. [2020-10-27 05:58:29,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14975 states. [2020-10-27 05:58:29,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14975 states to 14975 states and 20167 transitions. [2020-10-27 05:58:29,203 INFO L78 Accepts]: Start accepts. Automaton has 14975 states and 20167 transitions. Word has length 163 [2020-10-27 05:58:29,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:58:29,203 INFO L481 AbstractCegarLoop]: Abstraction has 14975 states and 20167 transitions. [2020-10-27 05:58:29,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:58:29,203 INFO L276 IsEmpty]: Start isEmpty. Operand 14975 states and 20167 transitions. [2020-10-27 05:58:29,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-27 05:58:29,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:58:29,215 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:58:29,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:58:29,215 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:58:29,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:58:29,216 INFO L82 PathProgramCache]: Analyzing trace with hash 2143980500, now seen corresponding path program 1 times [2020-10-27 05:58:29,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:58:29,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647693106] [2020-10-27 05:58:29,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:58:29,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:29,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:29,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:29,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:29,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:29,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:29,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:34,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:34,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-27 05:58:34,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:58:34,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 05:58:34,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:34,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:58:34,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 05:58:34,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 05:58:34,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:34,753 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 05:58:34,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:58:34,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:34,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:34,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:34,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:58:34,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:58:34,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:58:34,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:34,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:58:34,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:58:34,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:58:34,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:34,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:58:34,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647693106] [2020-10-27 05:58:34,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:58:34,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:58:34,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481956194] [2020-10-27 05:58:34,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:58:34,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:58:34,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:58:34,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:58:34,816 INFO L87 Difference]: Start difference. First operand 14975 states and 20167 transitions. Second operand 5 states. [2020-10-27 05:58:37,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:58:37,374 INFO L93 Difference]: Finished difference Result 24665 states and 33255 transitions. [2020-10-27 05:58:37,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:58:37,374 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 165 [2020-10-27 05:58:37,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:58:37,387 INFO L225 Difference]: With dead ends: 24665 [2020-10-27 05:58:37,387 INFO L226 Difference]: Without dead ends: 10175 [2020-10-27 05:58:37,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:58:37,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10175 states. [2020-10-27 05:58:38,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10175 to 10175. [2020-10-27 05:58:38,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10175 states. [2020-10-27 05:58:38,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10175 states to 10175 states and 13651 transitions. [2020-10-27 05:58:38,013 INFO L78 Accepts]: Start accepts. Automaton has 10175 states and 13651 transitions. Word has length 165 [2020-10-27 05:58:38,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:58:38,013 INFO L481 AbstractCegarLoop]: Abstraction has 10175 states and 13651 transitions. [2020-10-27 05:58:38,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:58:38,013 INFO L276 IsEmpty]: Start isEmpty. Operand 10175 states and 13651 transitions. [2020-10-27 05:58:38,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-27 05:58:38,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:58:38,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:58:38,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:58:38,023 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:58:38,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:58:38,023 INFO L82 PathProgramCache]: Analyzing trace with hash 763842985, now seen corresponding path program 1 times [2020-10-27 05:58:38,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:58:38,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912689566] [2020-10-27 05:58:38,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:58:38,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:38,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:38,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:38,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:38,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:38,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:40,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:42,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:43,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:43,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-27 05:58:43,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:58:43,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 05:58:43,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:43,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:58:43,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 05:58:43,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 05:58:43,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:43,577 WARN L193 SmtUtils]: Spent 450.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 05:58:43,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:58:43,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:43,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:43,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:43,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:58:43,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:58:43,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:58:43,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:43,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:58:43,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:58:43,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:58:43,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:43,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:58:43,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912689566] [2020-10-27 05:58:43,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:58:43,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:58:43,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050488008] [2020-10-27 05:58:43,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:58:43,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:58:43,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:58:43,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:58:43,631 INFO L87 Difference]: Start difference. First operand 10175 states and 13651 transitions. Second operand 5 states. [2020-10-27 05:58:46,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:58:46,118 INFO L93 Difference]: Finished difference Result 17560 states and 23622 transitions. [2020-10-27 05:58:46,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:58:46,119 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 169 [2020-10-27 05:58:46,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:58:46,127 INFO L225 Difference]: With dead ends: 17560 [2020-10-27 05:58:46,128 INFO L226 Difference]: Without dead ends: 8686 [2020-10-27 05:58:46,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:58:46,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8686 states. [2020-10-27 05:58:46,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8686 to 8684. [2020-10-27 05:58:46,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8684 states. [2020-10-27 05:58:46,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8684 states to 8684 states and 11637 transitions. [2020-10-27 05:58:46,655 INFO L78 Accepts]: Start accepts. Automaton has 8684 states and 11637 transitions. Word has length 169 [2020-10-27 05:58:46,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:58:46,655 INFO L481 AbstractCegarLoop]: Abstraction has 8684 states and 11637 transitions. [2020-10-27 05:58:46,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:58:46,655 INFO L276 IsEmpty]: Start isEmpty. Operand 8684 states and 11637 transitions. [2020-10-27 05:58:46,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-27 05:58:46,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:58:46,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:58:46,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:58:46,663 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:58:46,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:58:46,663 INFO L82 PathProgramCache]: Analyzing trace with hash 200172711, now seen corresponding path program 1 times [2020-10-27 05:58:46,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:58:46,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198552620] [2020-10-27 05:58:46,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:58:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:46,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:46,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:46,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:46,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:46,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:48,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:51,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:51,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-27 05:58:51,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:58:51,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:58:51,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:51,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:58:51,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:58:51,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 05:58:51,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:52,266 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 05:58:52,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:58:52,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:58:52,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:58:52,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:58:52,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:58:52,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:58:52,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 05:58:52,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:58:52,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:58:52,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:58:52,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:58:52,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:58:52,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:58:52,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198552620] [2020-10-27 05:58:52,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:58:52,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:58:52,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048869844] [2020-10-27 05:58:52,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:58:52,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:58:52,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:58:52,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:58:52,359 INFO L87 Difference]: Start difference. First operand 8684 states and 11637 transitions. Second operand 9 states. [2020-10-27 05:58:52,902 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2020-10-27 05:58:56,143 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification that was a NOOP. DAG size: 244 [2020-10-27 05:58:56,723 WARN L193 SmtUtils]: Spent 498.00 ms on a formula simplification that was a NOOP. DAG size: 242 [2020-10-27 05:58:58,567 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification that was a NOOP. DAG size: 242 [2020-10-27 05:58:59,120 WARN L193 SmtUtils]: Spent 472.00 ms on a formula simplification that was a NOOP. DAG size: 240 [2020-10-27 05:58:59,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:58:59,811 INFO L93 Difference]: Finished difference Result 28965 states and 39961 transitions. [2020-10-27 05:58:59,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 05:58:59,812 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 170 [2020-10-27 05:58:59,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:58:59,834 INFO L225 Difference]: With dead ends: 28965 [2020-10-27 05:58:59,834 INFO L226 Difference]: Without dead ends: 21654 [2020-10-27 05:58:59,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2020-10-27 05:58:59,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21654 states. [2020-10-27 05:59:00,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21654 to 12968. [2020-10-27 05:59:00,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12968 states. [2020-10-27 05:59:00,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12968 states to 12968 states and 17267 transitions. [2020-10-27 05:59:00,731 INFO L78 Accepts]: Start accepts. Automaton has 12968 states and 17267 transitions. Word has length 170 [2020-10-27 05:59:00,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:59:00,731 INFO L481 AbstractCegarLoop]: Abstraction has 12968 states and 17267 transitions. [2020-10-27 05:59:00,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:59:00,731 INFO L276 IsEmpty]: Start isEmpty. Operand 12968 states and 17267 transitions. [2020-10-27 05:59:00,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-27 05:59:00,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:59:00,739 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:59:00,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:59:00,739 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:59:00,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:59:00,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1363547161, now seen corresponding path program 1 times [2020-10-27 05:59:00,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:59:00,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555352910] [2020-10-27 05:59:00,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:59:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:00,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:00,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:00,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:00,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:01,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:01,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:01,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:01,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:01,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:01,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:01,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:02,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:05,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:05,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-27 05:59:05,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 05:59:05,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 05:59:05,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:05,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:59:05,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:59:05,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-10-27 05:59:05,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:06,382 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 05:59:06,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:59:06,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:06,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:06,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:06,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:59:06,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:59:06,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 05:59:06,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:06,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:59:06,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:59:06,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:59:06,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:06,531 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 05:59:06,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555352910] [2020-10-27 05:59:06,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:59:06,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:59:06,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388853908] [2020-10-27 05:59:06,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:59:06,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:59:06,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:59:06,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:59:06,534 INFO L87 Difference]: Start difference. First operand 12968 states and 17267 transitions. Second operand 9 states. [2020-10-27 05:59:07,077 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2020-10-27 05:59:10,147 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification that was a NOOP. DAG size: 244 [2020-10-27 05:59:10,714 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification that was a NOOP. DAG size: 242 [2020-10-27 05:59:12,691 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification that was a NOOP. DAG size: 242 [2020-10-27 05:59:13,251 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification that was a NOOP. DAG size: 240 [2020-10-27 05:59:14,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:59:14,468 INFO L93 Difference]: Finished difference Result 42613 states and 58002 transitions. [2020-10-27 05:59:14,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 05:59:14,470 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 170 [2020-10-27 05:59:14,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:59:14,607 INFO L225 Difference]: With dead ends: 42613 [2020-10-27 05:59:14,607 INFO L226 Difference]: Without dead ends: 30700 [2020-10-27 05:59:14,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2020-10-27 05:59:14,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30700 states. [2020-10-27 05:59:15,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30700 to 15678. [2020-10-27 05:59:15,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15678 states. [2020-10-27 05:59:15,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15678 states to 15678 states and 20569 transitions. [2020-10-27 05:59:15,807 INFO L78 Accepts]: Start accepts. Automaton has 15678 states and 20569 transitions. Word has length 170 [2020-10-27 05:59:15,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:59:15,807 INFO L481 AbstractCegarLoop]: Abstraction has 15678 states and 20569 transitions. [2020-10-27 05:59:15,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:59:15,808 INFO L276 IsEmpty]: Start isEmpty. Operand 15678 states and 20569 transitions. [2020-10-27 05:59:15,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-27 05:59:15,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:59:15,819 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:59:15,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:59:15,819 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:59:15,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:59:15,820 INFO L82 PathProgramCache]: Analyzing trace with hash -8224426, now seen corresponding path program 1 times [2020-10-27 05:59:15,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:59:15,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524317893] [2020-10-27 05:59:15,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:59:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:15,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:15,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:15,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:15,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:16,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:16,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:16,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:16,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:16,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:16,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:17,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:20,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:20,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-27 05:59:20,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 05:59:20,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-27 05:59:20,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:20,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:59:20,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:59:20,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-27 05:59:20,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:21,473 WARN L193 SmtUtils]: Spent 429.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 05:59:21,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:59:21,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:21,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:21,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:21,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:59:21,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:59:21,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:59:21,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:21,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:59:21,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:59:21,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:59:21,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:21,548 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 05:59:21,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524317893] [2020-10-27 05:59:21,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:59:21,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:59:21,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061286831] [2020-10-27 05:59:21,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:59:21,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:59:21,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:59:21,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:59:21,550 INFO L87 Difference]: Start difference. First operand 15678 states and 20569 transitions. Second operand 5 states. [2020-10-27 05:59:22,060 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification that was a NOOP. DAG size: 236 [2020-10-27 05:59:26,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:59:26,255 INFO L93 Difference]: Finished difference Result 27143 states and 35658 transitions. [2020-10-27 05:59:26,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:59:26,256 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 170 [2020-10-27 05:59:26,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:59:26,274 INFO L225 Difference]: With dead ends: 27143 [2020-10-27 05:59:26,274 INFO L226 Difference]: Without dead ends: 15706 [2020-10-27 05:59:26,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:59:26,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15706 states. [2020-10-27 05:59:27,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15706 to 15670. [2020-10-27 05:59:27,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15670 states. [2020-10-27 05:59:27,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15670 states to 15670 states and 20474 transitions. [2020-10-27 05:59:27,578 INFO L78 Accepts]: Start accepts. Automaton has 15670 states and 20474 transitions. Word has length 170 [2020-10-27 05:59:27,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:59:27,579 INFO L481 AbstractCegarLoop]: Abstraction has 15670 states and 20474 transitions. [2020-10-27 05:59:27,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:59:27,579 INFO L276 IsEmpty]: Start isEmpty. Operand 15670 states and 20474 transitions. [2020-10-27 05:59:27,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-27 05:59:27,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:59:27,587 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:59:27,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:59:27,587 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:59:27,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:59:27,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1308484857, now seen corresponding path program 1 times [2020-10-27 05:59:27,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:59:27,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252631235] [2020-10-27 05:59:27,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:59:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:27,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:27,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:27,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:27,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:27,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:29,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:32,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:32,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-27 05:59:32,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:59:32,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-27 05:59:32,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:32,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:59:32,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:59:32,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 05:59:32,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:33,199 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 05:59:33,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:59:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:33,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:33,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:33,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:59:33,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:59:33,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 05:59:33,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:33,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:59:33,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:59:33,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:59:33,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:33,297 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 05:59:33,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252631235] [2020-10-27 05:59:33,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:59:33,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:59:33,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586765320] [2020-10-27 05:59:33,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:59:33,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:59:33,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:59:33,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:59:33,299 INFO L87 Difference]: Start difference. First operand 15670 states and 20474 transitions. Second operand 9 states. [2020-10-27 05:59:33,850 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification that was a NOOP. DAG size: 238 [2020-10-27 05:59:37,163 WARN L193 SmtUtils]: Spent 512.00 ms on a formula simplification that was a NOOP. DAG size: 244 [2020-10-27 05:59:37,737 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification that was a NOOP. DAG size: 242 [2020-10-27 05:59:39,637 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification that was a NOOP. DAG size: 242 [2020-10-27 05:59:40,308 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification that was a NOOP. DAG size: 240 [2020-10-27 05:59:41,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:59:41,990 INFO L93 Difference]: Finished difference Result 43915 states and 58433 transitions. [2020-10-27 05:59:41,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 05:59:41,991 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 171 [2020-10-27 05:59:41,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:59:42,023 INFO L225 Difference]: With dead ends: 43915 [2020-10-27 05:59:42,023 INFO L226 Difference]: Without dead ends: 34723 [2020-10-27 05:59:42,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2020-10-27 05:59:42,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34723 states. [2020-10-27 05:59:43,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34723 to 20491. [2020-10-27 05:59:43,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20491 states. [2020-10-27 05:59:43,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20491 states to 20491 states and 26668 transitions. [2020-10-27 05:59:43,850 INFO L78 Accepts]: Start accepts. Automaton has 20491 states and 26668 transitions. Word has length 171 [2020-10-27 05:59:43,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:59:43,850 INFO L481 AbstractCegarLoop]: Abstraction has 20491 states and 26668 transitions. [2020-10-27 05:59:43,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:59:43,850 INFO L276 IsEmpty]: Start isEmpty. Operand 20491 states and 26668 transitions. [2020-10-27 05:59:43,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-27 05:59:43,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:59:43,861 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:59:43,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:59:43,861 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:59:43,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:59:43,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1359146474, now seen corresponding path program 1 times [2020-10-27 05:59:43,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:59:43,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441423799] [2020-10-27 05:59:43,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:59:43,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:43,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:43,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:43,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:44,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:45,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:46,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:46,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-27 05:59:46,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:59:46,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2408 [2020-10-27 05:59:46,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:46,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:59:46,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-27 05:59:46,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-27 05:59:46,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:46,783 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 05:59:46,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:59:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:46,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:46,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:46,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:59:46,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:59:46,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:59:46,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:46,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:59:46,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:59:46,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:59:46,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:46,833 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 05:59:46,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441423799] [2020-10-27 05:59:46,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:59:46,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:59:46,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630661982] [2020-10-27 05:59:46,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:59:46,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:59:46,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:59:46,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:59:46,835 INFO L87 Difference]: Start difference. First operand 20491 states and 26668 transitions. Second operand 4 states. [2020-10-27 05:59:47,310 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification that was a NOOP. DAG size: 233 [2020-10-27 05:59:52,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:59:52,337 INFO L93 Difference]: Finished difference Result 43245 states and 58938 transitions. [2020-10-27 05:59:52,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:59:52,338 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2020-10-27 05:59:52,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:59:52,370 INFO L225 Difference]: With dead ends: 43245 [2020-10-27 05:59:52,370 INFO L226 Difference]: Without dead ends: 34145 [2020-10-27 05:59:52,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:59:52,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34145 states. [2020-10-27 05:59:55,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34145 to 34142. [2020-10-27 05:59:55,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34142 states. [2020-10-27 05:59:55,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34142 states to 34142 states and 45157 transitions. [2020-10-27 05:59:55,638 INFO L78 Accepts]: Start accepts. Automaton has 34142 states and 45157 transitions. Word has length 171 [2020-10-27 05:59:55,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:59:55,638 INFO L481 AbstractCegarLoop]: Abstraction has 34142 states and 45157 transitions. [2020-10-27 05:59:55,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:59:55,638 INFO L276 IsEmpty]: Start isEmpty. Operand 34142 states and 45157 transitions. [2020-10-27 05:59:55,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-27 05:59:55,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:59:55,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:59:55,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:59:55,658 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:59:55,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:59:55,659 INFO L82 PathProgramCache]: Analyzing trace with hash -778863207, now seen corresponding path program 1 times [2020-10-27 05:59:55,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:59:55,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340255680] [2020-10-27 05:59:55,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:59:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:55,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:55,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:55,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:56,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:56,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-27 05:59:56,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:59:56,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 794 [2020-10-27 05:59:56,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:56,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:59:56,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-27 05:59:56,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 05:59:56,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:56,972 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 05:59:56,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:59:56,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:59:56,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:59:56,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:59:56,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:59:56,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:59:56,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:59:56,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:59:56,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:59:56,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:59:56,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:59:56,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:59:57,020 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 05:59:57,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340255680] [2020-10-27 05:59:57,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:59:57,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:59:57,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149561139] [2020-10-27 05:59:57,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:59:57,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:59:57,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:59:57,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:59:57,022 INFO L87 Difference]: Start difference. First operand 34142 states and 45157 transitions. Second operand 4 states. [2020-10-27 06:00:02,112 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-10-27 06:00:04,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:00:04,791 INFO L93 Difference]: Finished difference Result 75336 states and 101525 transitions. [2020-10-27 06:00:04,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 06:00:04,792 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 171 [2020-10-27 06:00:04,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:00:04,850 INFO L225 Difference]: With dead ends: 75336 [2020-10-27 06:00:04,850 INFO L226 Difference]: Without dead ends: 42979 [2020-10-27 06:00:04,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:00:04,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42979 states. [2020-10-27 06:00:08,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42979 to 39142. [2020-10-27 06:00:08,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39142 states. [2020-10-27 06:00:08,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39142 states to 39142 states and 53608 transitions. [2020-10-27 06:00:08,875 INFO L78 Accepts]: Start accepts. Automaton has 39142 states and 53608 transitions. Word has length 171 [2020-10-27 06:00:08,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:00:08,876 INFO L481 AbstractCegarLoop]: Abstraction has 39142 states and 53608 transitions. [2020-10-27 06:00:08,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 06:00:08,876 INFO L276 IsEmpty]: Start isEmpty. Operand 39142 states and 53608 transitions. [2020-10-27 06:00:08,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-27 06:00:08,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:00:08,889 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:00:08,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 06:00:08,889 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:00:08,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:00:08,889 INFO L82 PathProgramCache]: Analyzing trace with hash -274464881, now seen corresponding path program 1 times [2020-10-27 06:00:08,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:00:08,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899878390] [2020-10-27 06:00:08,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:00:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:00:08,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:08,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:09,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:00:09,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-27 06:00:09,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 06:00:09,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 446 [2020-10-27 06:00:09,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:00:09,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:00:09,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-27 06:00:09,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 06:00:09,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:00:09,857 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-10-27 06:00:09,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:00:09,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:00:09,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:00:09,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:00:09,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:00:09,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:00:09,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 06:00:09,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:00:09,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:00:09,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:00:09,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:00:09,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:00:09,904 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 06:00:09,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899878390] [2020-10-27 06:00:09,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:00:09,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 06:00:09,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256058086] [2020-10-27 06:00:09,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 06:00:09,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:00:09,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 06:00:09,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 06:00:09,906 INFO L87 Difference]: Start difference. First operand 39142 states and 53608 transitions. Second operand 4 states. [2020-10-27 06:00:15,074 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-10-27 06:00:19,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:00:19,297 INFO L93 Difference]: Finished difference Result 89161 states and 124578 transitions. [2020-10-27 06:00:19,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 06:00:19,298 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 174 [2020-10-27 06:00:19,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:00:19,367 INFO L225 Difference]: With dead ends: 89161 [2020-10-27 06:00:19,367 INFO L226 Difference]: Without dead ends: 51620 [2020-10-27 06:00:19,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:00:19,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51620 states.