/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:47:45,404 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:47:45,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:47:45,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:47:45,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:47:45,469 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:47:45,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:47:45,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:47:45,480 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:47:45,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:47:45,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:47:45,488 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:47:45,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:47:45,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:47:45,494 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:47:45,495 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:47:45,496 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:47:45,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:47:45,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:47:45,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:47:45,517 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:47:45,519 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:47:45,522 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:47:45,523 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:47:45,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:47:45,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:47:45,533 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:47:45,535 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:47:45,535 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:47:45,536 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:47:45,537 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:47:45,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:47:45,539 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:47:45,540 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:47:45,541 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:47:45,541 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:47:45,542 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:47:45,542 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:47:45,543 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:47:45,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:47:45,545 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:47:45,553 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 05:47:45,606 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:47:45,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:47:45,611 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:47:45,611 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:47:45,611 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:47:45,612 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:47:45,612 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:47:45,612 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:47:45,612 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:47:45,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:47:45,613 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:47:45,614 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:47:45,614 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:47:45,614 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:47:45,614 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:47:45,614 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:47:45,615 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:47:45,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:47:45,615 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:47:45,615 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:47:45,615 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:47:45,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:47:45,624 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:47:45,624 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:47:45,624 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:47:45,624 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:47:45,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:47:45,625 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:47:45,625 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:47:45,625 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:47:46,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:47:46,080 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:47:46,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:47:46,085 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:47:46,086 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:47:46,087 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 05:47:46,173 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/41765a314/51aaabdbba91423880eb9473237b4613/FLAGad6a2f783 [2020-10-27 05:47:46,980 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:47:46,981 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 05:47:46,993 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/41765a314/51aaabdbba91423880eb9473237b4613/FLAGad6a2f783 [2020-10-27 05:47:47,258 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/41765a314/51aaabdbba91423880eb9473237b4613 [2020-10-27 05:47:47,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:47:47,269 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:47:47,273 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:47:47,273 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:47:47,277 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:47:47,278 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:47:47" (1/1) ... [2020-10-27 05:47:47,283 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@707fd674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:47:47, skipping insertion in model container [2020-10-27 05:47:47,283 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:47:47" (1/1) ... [2020-10-27 05:47:47,291 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:47:47,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:47:47,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:47:47,694 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:47:47,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:47:47,848 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:47:47,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:47:47 WrapperNode [2020-10-27 05:47:47,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:47:47,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:47:47,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:47:47,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:47:47,868 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:47:47" (1/1) ... [2020-10-27 05:47:47,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:47:47" (1/1) ... [2020-10-27 05:47:47,884 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:47:47" (1/1) ... [2020-10-27 05:47:47,885 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:47:47" (1/1) ... [2020-10-27 05:47:47,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:47:47" (1/1) ... [2020-10-27 05:47:47,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:47:47" (1/1) ... [2020-10-27 05:47:47,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:47:47" (1/1) ... [2020-10-27 05:47:47,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:47:47,963 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:47:47,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:47:47,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:47:47,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:47:47" (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 05:47:48,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:47:48,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:47:48,083 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:47:48,084 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:47:48,085 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:47:48,085 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:47:48,085 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:47:48,086 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:47:48,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:47:48,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:47:48,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:47:48,088 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:47:48,089 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:47:48,089 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:47:48,089 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:47:48,092 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:47:48,092 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:47:48,092 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:47:48,093 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:47:48,093 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-27 05:47:48,093 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-27 05:47:48,094 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:47:48,094 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:47:48,094 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:47:48,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:47:48,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:47:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:47:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:47:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:47:48,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:47:49,181 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:47:49,182 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:47:49,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:47:49 BoogieIcfgContainer [2020-10-27 05:47:49,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:47:49,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:47:49,186 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:47:49,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:47:49,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:47:47" (1/3) ... [2020-10-27 05:47:49,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@979d41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:47:49, skipping insertion in model container [2020-10-27 05:47:49,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:47:47" (2/3) ... [2020-10-27 05:47:49,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@979d41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:47:49, skipping insertion in model container [2020-10-27 05:47:49,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:47:49" (3/3) ... [2020-10-27 05:47:49,193 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-27 05:47:49,205 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:47:49,210 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:47:49,224 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:47:49,253 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:47:49,254 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:47:49,254 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:47:49,254 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:47:49,254 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:47:49,254 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:47:49,254 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:47:49,255 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:47:49,278 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states. [2020-10-27 05:47:49,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 05:47:49,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:47:49,290 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] [2020-10-27 05:47:49,291 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:47:49,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:47:49,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1870353334, now seen corresponding path program 1 times [2020-10-27 05:47:49,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:47:49,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142685137] [2020-10-27 05:47:49,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:47:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:47:49,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:47:50,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:47:50,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:47:54,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:47:54,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 05:47:54,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:47:54,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4512 [2020-10-27 05:47:54,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:47:54,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:47:54,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:47:54,239 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 05:47:54,239 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 05:47:54,840 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:47:54,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:47:54,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:47:54,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:47:54,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:47:54,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:47:54,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:47:54,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 05:47:54,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:47:54,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:47:54,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:47:54,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:47:54,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:47:55,010 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 05:47:55,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142685137] [2020-10-27 05:47:55,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:47:55,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:47:55,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142989834] [2020-10-27 05:47:55,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:47:55,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:47:55,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:47:55,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:47:55,050 INFO L87 Difference]: Start difference. First operand 224 states. Second operand 8 states. [2020-10-27 05:47:57,236 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 05:47:57,516 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:47:57,791 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:47:58,150 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-27 05:47:58,459 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 05:47:59,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:47:59,681 INFO L93 Difference]: Finished difference Result 866 states and 1419 transitions. [2020-10-27 05:47:59,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:47:59,689 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 85 [2020-10-27 05:47:59,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:47:59,741 INFO L225 Difference]: With dead ends: 866 [2020-10-27 05:47:59,741 INFO L226 Difference]: Without dead ends: 702 [2020-10-27 05:47:59,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:47:59,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-10-27 05:47:59,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 690. [2020-10-27 05:47:59,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2020-10-27 05:47:59,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1047 transitions. [2020-10-27 05:47:59,878 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1047 transitions. Word has length 85 [2020-10-27 05:47:59,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:47:59,879 INFO L481 AbstractCegarLoop]: Abstraction has 690 states and 1047 transitions. [2020-10-27 05:47:59,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:47:59,880 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1047 transitions. [2020-10-27 05:47:59,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 05:47:59,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:47:59,886 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:47:59,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:47:59,887 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:47:59,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:47:59,887 INFO L82 PathProgramCache]: Analyzing trace with hash -223568779, now seen corresponding path program 1 times [2020-10-27 05:47:59,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:47:59,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967836626] [2020-10-27 05:47:59,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:47:59,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:47:59,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:47:59,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:00,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:02,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:48:02,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 05:48:02,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:48:02,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2306 [2020-10-27 05:48:02,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:48:02,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:48:02,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:48:02,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:48:02,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-27 05:48:02,608 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:48:02,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:48:02,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:48:02,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:02,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:48:02,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:48:02,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:48:02,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 05:48:02,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:48:02,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:48:02,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:48:02,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:48:02,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:48:02,685 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 05:48:02,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967836626] [2020-10-27 05:48:02,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:48:02,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:48:02,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466393815] [2020-10-27 05:48:02,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:48:02,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:48:02,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:48:02,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:48:02,689 INFO L87 Difference]: Start difference. First operand 690 states and 1047 transitions. Second operand 6 states. [2020-10-27 05:48:03,026 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:48:03,953 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:48:04,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:48:04,440 INFO L93 Difference]: Finished difference Result 1768 states and 2735 transitions. [2020-10-27 05:48:04,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:48:04,441 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2020-10-27 05:48:04,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:48:04,450 INFO L225 Difference]: With dead ends: 1768 [2020-10-27 05:48:04,450 INFO L226 Difference]: Without dead ends: 1140 [2020-10-27 05:48:04,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:48:04,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2020-10-27 05:48:04,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 1137. [2020-10-27 05:48:04,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1137 states. [2020-10-27 05:48:04,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 1748 transitions. [2020-10-27 05:48:04,566 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 1748 transitions. Word has length 86 [2020-10-27 05:48:04,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:48:04,567 INFO L481 AbstractCegarLoop]: Abstraction has 1137 states and 1748 transitions. [2020-10-27 05:48:04,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:48:04,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 1748 transitions. [2020-10-27 05:48:04,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 05:48:04,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:48:04,572 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:48:04,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:48:04,572 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:48:04,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:48:04,573 INFO L82 PathProgramCache]: Analyzing trace with hash -53573737, now seen corresponding path program 1 times [2020-10-27 05:48:04,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:48:04,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946999548] [2020-10-27 05:48:04,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:48:04,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:48:04,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:04,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:04,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:06,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:48:06,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 05:48:06,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:48:06,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1887 [2020-10-27 05:48:06,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:48:06,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:48:06,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:48:06,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 05:48:06,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:48:06,848 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:48:06,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:48:06,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:48:06,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:06,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:48:06,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:48:06,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:48:06,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 05:48:06,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:48:06,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:48:06,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:48:06,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:48:06,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:48:06,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:48:06,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946999548] [2020-10-27 05:48:06,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:48:06,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:48:06,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277461585] [2020-10-27 05:48:06,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:48:06,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:48:06,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:48:06,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:48:06,932 INFO L87 Difference]: Start difference. First operand 1137 states and 1748 transitions. Second operand 6 states. [2020-10-27 05:48:07,250 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:48:08,165 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:48:08,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:48:08,764 INFO L93 Difference]: Finished difference Result 2952 states and 4600 transitions. [2020-10-27 05:48:08,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:48:08,764 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2020-10-27 05:48:08,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:48:08,789 INFO L225 Difference]: With dead ends: 2952 [2020-10-27 05:48:08,790 INFO L226 Difference]: Without dead ends: 1930 [2020-10-27 05:48:08,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:48:08,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-10-27 05:48:08,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1927. [2020-10-27 05:48:08,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1927 states. [2020-10-27 05:48:08,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1927 states to 1927 states and 2979 transitions. [2020-10-27 05:48:08,934 INFO L78 Accepts]: Start accepts. Automaton has 1927 states and 2979 transitions. Word has length 86 [2020-10-27 05:48:08,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:48:08,935 INFO L481 AbstractCegarLoop]: Abstraction has 1927 states and 2979 transitions. [2020-10-27 05:48:08,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:48:08,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1927 states and 2979 transitions. [2020-10-27 05:48:08,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 05:48:08,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:48:08,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:48:08,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:48:08,938 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:48:08,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:48:08,939 INFO L82 PathProgramCache]: Analyzing trace with hash -960676056, now seen corresponding path program 1 times [2020-10-27 05:48:08,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:48:08,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129994692] [2020-10-27 05:48:08,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:48:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:48:08,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:09,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:09,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:10,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:48:10,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 05:48:10,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:48:10,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1794 [2020-10-27 05:48:10,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:48:10,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:48:10,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:48:10,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 05:48:10,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:48:11,123 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:48:11,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:48:11,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:48:11,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:11,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:48:11,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:48:11,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:48:11,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 05:48:11,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:48:11,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:48:11,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:48:11,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:48:11,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:48:11,187 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 05:48:11,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129994692] [2020-10-27 05:48:11,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:48:11,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:48:11,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291161381] [2020-10-27 05:48:11,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:48:11,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:48:11,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:48:11,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:48:11,190 INFO L87 Difference]: Start difference. First operand 1927 states and 2979 transitions. Second operand 6 states. [2020-10-27 05:48:11,491 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:48:12,462 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:48:13,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:48:13,058 INFO L93 Difference]: Finished difference Result 5260 states and 8220 transitions. [2020-10-27 05:48:13,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:48:13,059 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2020-10-27 05:48:13,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:48:13,079 INFO L225 Difference]: With dead ends: 5260 [2020-10-27 05:48:13,079 INFO L226 Difference]: Without dead ends: 3482 [2020-10-27 05:48:13,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:48:13,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3482 states. [2020-10-27 05:48:13,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3482 to 3479. [2020-10-27 05:48:13,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3479 states. [2020-10-27 05:48:13,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3479 states to 3479 states and 5402 transitions. [2020-10-27 05:48:13,330 INFO L78 Accepts]: Start accepts. Automaton has 3479 states and 5402 transitions. Word has length 86 [2020-10-27 05:48:13,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:48:13,330 INFO L481 AbstractCegarLoop]: Abstraction has 3479 states and 5402 transitions. [2020-10-27 05:48:13,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:48:13,330 INFO L276 IsEmpty]: Start isEmpty. Operand 3479 states and 5402 transitions. [2020-10-27 05:48:13,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 05:48:13,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:48:13,340 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:48:13,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:48:13,340 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:48:13,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:48:13,341 INFO L82 PathProgramCache]: Analyzing trace with hash -2080490490, now seen corresponding path program 1 times [2020-10-27 05:48:13,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:48:13,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993506748] [2020-10-27 05:48:13,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:48:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:48:13,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:13,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:13,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:15,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:48:15,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 05:48:15,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:48:15,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1763 [2020-10-27 05:48:15,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:48:15,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:48:15,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:48:15,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:48:15,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:48:15,459 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:48:15,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:48:15,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:48:15,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:15,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:48:15,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:48:15,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:48:15,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 05:48:15,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:48:15,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:48:15,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:48:15,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:48:15,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:48:15,529 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 05:48:15,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993506748] [2020-10-27 05:48:15,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:48:15,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:48:15,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327502909] [2020-10-27 05:48:15,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:48:15,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:48:15,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:48:15,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:48:15,533 INFO L87 Difference]: Start difference. First operand 3479 states and 5402 transitions. Second operand 6 states. [2020-10-27 05:48:15,869 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:48:16,836 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 180 [2020-10-27 05:48:17,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:48:17,588 INFO L93 Difference]: Finished difference Result 10056 states and 15699 transitions. [2020-10-27 05:48:17,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:48:17,589 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2020-10-27 05:48:17,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:48:17,626 INFO L225 Difference]: With dead ends: 10056 [2020-10-27 05:48:17,626 INFO L226 Difference]: Without dead ends: 6662 [2020-10-27 05:48:17,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:48:17,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6662 states. [2020-10-27 05:48:18,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6662 to 6659. [2020-10-27 05:48:18,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6659 states. [2020-10-27 05:48:18,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6659 states to 6659 states and 10338 transitions. [2020-10-27 05:48:18,143 INFO L78 Accepts]: Start accepts. Automaton has 6659 states and 10338 transitions. Word has length 86 [2020-10-27 05:48:18,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:48:18,143 INFO L481 AbstractCegarLoop]: Abstraction has 6659 states and 10338 transitions. [2020-10-27 05:48:18,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:48:18,144 INFO L276 IsEmpty]: Start isEmpty. Operand 6659 states and 10338 transitions. [2020-10-27 05:48:18,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 05:48:18,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:48:18,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:48:18,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:48:18,148 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:48:18,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:48:18,151 INFO L82 PathProgramCache]: Analyzing trace with hash 268036324, now seen corresponding path program 1 times [2020-10-27 05:48:18,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:48:18,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377016893] [2020-10-27 05:48:18,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:48:18,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:48:18,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:18,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:18,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:19,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:48:19,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 05:48:19,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:48:19,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1577 [2020-10-27 05:48:19,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:48:19,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:48:19,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:48:19,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 05:48:19,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:48:20,146 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:48:20,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:48:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:48:20,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:20,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:48:20,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:48:20,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:48:20,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 05:48:20,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:48:20,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:48:20,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:48:20,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:48:20,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:48:20,220 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 05:48:20,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377016893] [2020-10-27 05:48:20,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:48:20,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:48:20,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338285245] [2020-10-27 05:48:20,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:48:20,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:48:20,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:48:20,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:48:20,224 INFO L87 Difference]: Start difference. First operand 6659 states and 10338 transitions. Second operand 6 states. [2020-10-27 05:48:20,567 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:48:21,648 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:48:22,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:48:22,586 INFO L93 Difference]: Finished difference Result 19583 states and 30422 transitions. [2020-10-27 05:48:22,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:48:22,587 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2020-10-27 05:48:22,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:48:22,653 INFO L225 Difference]: With dead ends: 19583 [2020-10-27 05:48:22,653 INFO L226 Difference]: Without dead ends: 12970 [2020-10-27 05:48:22,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:48:22,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12970 states. [2020-10-27 05:48:23,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12970 to 12967. [2020-10-27 05:48:23,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12967 states. [2020-10-27 05:48:23,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12967 states to 12967 states and 19986 transitions. [2020-10-27 05:48:23,539 INFO L78 Accepts]: Start accepts. Automaton has 12967 states and 19986 transitions. Word has length 86 [2020-10-27 05:48:23,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:48:23,540 INFO L481 AbstractCegarLoop]: Abstraction has 12967 states and 19986 transitions. [2020-10-27 05:48:23,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:48:23,540 INFO L276 IsEmpty]: Start isEmpty. Operand 12967 states and 19986 transitions. [2020-10-27 05:48:23,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 05:48:23,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:48:23,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:48:23,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:48:23,547 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:48:23,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:48:23,547 INFO L82 PathProgramCache]: Analyzing trace with hash -996072127, now seen corresponding path program 1 times [2020-10-27 05:48:23,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:48:23,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99409498] [2020-10-27 05:48:23,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:48:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:48:23,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:23,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:23,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:23,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:27,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:48:27,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 05:48:27,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:48:27,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4113 [2020-10-27 05:48:27,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:48:27,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:48:27,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:48:27,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 05:48:27,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:48:28,226 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:48:28,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:48:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:48:28,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:28,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:48:28,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:48:28,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:48:28,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 05:48:28,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:48:28,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:48:28,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:48:28,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:48:28,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:48:28,326 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 05:48:28,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99409498] [2020-10-27 05:48:28,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:48:28,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:48:28,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118483158] [2020-10-27 05:48:28,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:48:28,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:48:28,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:48:28,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:48:28,329 INFO L87 Difference]: Start difference. First operand 12967 states and 19986 transitions. Second operand 11 states. [2020-10-27 05:48:28,706 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 05:48:30,798 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 05:48:31,155 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:48:35,496 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:48:37,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:48:37,616 INFO L93 Difference]: Finished difference Result 99126 states and 153086 transitions. [2020-10-27 05:48:37,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 05:48:37,617 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 87 [2020-10-27 05:48:37,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:48:37,875 INFO L225 Difference]: With dead ends: 99126 [2020-10-27 05:48:37,876 INFO L226 Difference]: Without dead ends: 88771 [2020-10-27 05:48:37,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=296, Invalid=1110, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 05:48:38,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88771 states. [2020-10-27 05:48:40,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88771 to 13119. [2020-10-27 05:48:40,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13119 states. [2020-10-27 05:48:40,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13119 states to 13119 states and 20186 transitions. [2020-10-27 05:48:40,236 INFO L78 Accepts]: Start accepts. Automaton has 13119 states and 20186 transitions. Word has length 87 [2020-10-27 05:48:40,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:48:40,237 INFO L481 AbstractCegarLoop]: Abstraction has 13119 states and 20186 transitions. [2020-10-27 05:48:40,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:48:40,237 INFO L276 IsEmpty]: Start isEmpty. Operand 13119 states and 20186 transitions. [2020-10-27 05:48:40,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 05:48:40,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:48:40,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:48:40,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:48:40,244 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:48:40,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:48:40,244 INFO L82 PathProgramCache]: Analyzing trace with hash 687629441, now seen corresponding path program 1 times [2020-10-27 05:48:40,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:48:40,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196852873] [2020-10-27 05:48:40,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:48:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:48:40,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:40,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:41,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:41,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:43,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:48:43,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 05:48:43,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:48:43,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3105 [2020-10-27 05:48:43,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:48:43,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:48:43,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:48:43,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 05:48:43,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:48:44,016 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:48:44,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:48:44,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:48:44,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:44,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:48:44,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:48:44,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:48:44,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 05:48:44,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:48:44,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:48:44,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:48:44,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:48:44,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:48:44,151 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 05:48:44,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196852873] [2020-10-27 05:48:44,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:48:44,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:48:44,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059701311] [2020-10-27 05:48:44,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:48:44,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:48:44,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:48:44,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:48:44,160 INFO L87 Difference]: Start difference. First operand 13119 states and 20186 transitions. Second operand 11 states. [2020-10-27 05:48:44,591 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 05:48:46,678 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:48:47,066 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:48:52,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:48:52,476 INFO L93 Difference]: Finished difference Result 49661 states and 76138 transitions. [2020-10-27 05:48:52,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 05:48:52,477 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 87 [2020-10-27 05:48:52,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:48:52,570 INFO L225 Difference]: With dead ends: 49661 [2020-10-27 05:48:52,570 INFO L226 Difference]: Without dead ends: 44170 [2020-10-27 05:48:52,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=261, Invalid=861, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 05:48:52,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44170 states. [2020-10-27 05:48:54,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44170 to 13413. [2020-10-27 05:48:54,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13413 states. [2020-10-27 05:48:54,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13413 states to 13413 states and 20608 transitions. [2020-10-27 05:48:54,084 INFO L78 Accepts]: Start accepts. Automaton has 13413 states and 20608 transitions. Word has length 87 [2020-10-27 05:48:54,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:48:54,084 INFO L481 AbstractCegarLoop]: Abstraction has 13413 states and 20608 transitions. [2020-10-27 05:48:54,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:48:54,084 INFO L276 IsEmpty]: Start isEmpty. Operand 13413 states and 20608 transitions. [2020-10-27 05:48:54,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 05:48:54,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:48:54,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:48:54,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:48:54,092 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:48:54,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:48:54,093 INFO L82 PathProgramCache]: Analyzing trace with hash -266968031, now seen corresponding path program 1 times [2020-10-27 05:48:54,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:48:54,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431915809] [2020-10-27 05:48:54,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:48:54,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:48:54,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:54,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:54,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:54,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:58,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:48:58,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 05:48:58,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:48:58,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4030 [2020-10-27 05:48:58,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:48:58,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:48:58,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:48:58,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 05:48:58,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:48:58,706 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:48:58,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:48:58,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:48:58,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:48:58,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:48:58,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:48:58,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:48:58,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 05:48:58,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:48:58,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:48:58,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:48:58,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:48:58,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:48:58,813 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 05:48:58,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431915809] [2020-10-27 05:48:58,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:48:58,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:48:58,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957855868] [2020-10-27 05:48:58,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:48:58,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:48:58,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:48:58,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:48:58,816 INFO L87 Difference]: Start difference. First operand 13413 states and 20608 transitions. Second operand 11 states. [2020-10-27 05:48:59,280 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 05:49:01,809 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 05:49:02,191 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:49:07,051 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:49:11,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:49:11,295 INFO L93 Difference]: Finished difference Result 73272 states and 112988 transitions. [2020-10-27 05:49:11,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 05:49:11,296 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 87 [2020-10-27 05:49:11,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:49:11,422 INFO L225 Difference]: With dead ends: 73272 [2020-10-27 05:49:11,422 INFO L226 Difference]: Without dead ends: 70289 [2020-10-27 05:49:11,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=290, Invalid=1042, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 05:49:11,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70289 states. [2020-10-27 05:49:13,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70289 to 13413. [2020-10-27 05:49:13,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13413 states. [2020-10-27 05:49:13,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13413 states to 13413 states and 20604 transitions. [2020-10-27 05:49:13,282 INFO L78 Accepts]: Start accepts. Automaton has 13413 states and 20604 transitions. Word has length 87 [2020-10-27 05:49:13,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:49:13,282 INFO L481 AbstractCegarLoop]: Abstraction has 13413 states and 20604 transitions. [2020-10-27 05:49:13,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:49:13,282 INFO L276 IsEmpty]: Start isEmpty. Operand 13413 states and 20604 transitions. [2020-10-27 05:49:13,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 05:49:13,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:49:13,288 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:49:13,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:49:13,289 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:49:13,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:49:13,289 INFO L82 PathProgramCache]: Analyzing trace with hash 552772833, now seen corresponding path program 1 times [2020-10-27 05:49:13,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:49:13,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720576776] [2020-10-27 05:49:13,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:49:13,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:49:13,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:49:13,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:49:13,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:49:13,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:49:16,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:49:16,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 05:49:16,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:49:16,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2821 [2020-10-27 05:49:16,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:49:16,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:49:16,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:49:16,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 05:49:16,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:49:16,573 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:49:16,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:49:16,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:49:16,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:49:16,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:49:16,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:49:16,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:49:16,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 05:49:16,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:49:16,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:49:16,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:49:16,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:49:16,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:49:16,643 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 05:49:16,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720576776] [2020-10-27 05:49:16,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:49:16,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:49:16,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050880420] [2020-10-27 05:49:16,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:49:16,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:49:16,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:49:16,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:49:16,646 INFO L87 Difference]: Start difference. First operand 13413 states and 20604 transitions. Second operand 11 states. [2020-10-27 05:49:17,105 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 05:49:19,623 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:49:19,943 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:49:26,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:49:26,759 INFO L93 Difference]: Finished difference Result 53456 states and 81580 transitions. [2020-10-27 05:49:26,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 05:49:26,760 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 87 [2020-10-27 05:49:26,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:49:26,844 INFO L225 Difference]: With dead ends: 53456 [2020-10-27 05:49:26,845 INFO L226 Difference]: Without dead ends: 46653 [2020-10-27 05:49:26,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2020-10-27 05:49:26,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46653 states. [2020-10-27 05:49:29,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46653 to 13794. [2020-10-27 05:49:29,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13794 states. [2020-10-27 05:49:29,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13794 states to 13794 states and 21114 transitions. [2020-10-27 05:49:29,096 INFO L78 Accepts]: Start accepts. Automaton has 13794 states and 21114 transitions. Word has length 87 [2020-10-27 05:49:29,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:49:29,096 INFO L481 AbstractCegarLoop]: Abstraction has 13794 states and 21114 transitions. [2020-10-27 05:49:29,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:49:29,096 INFO L276 IsEmpty]: Start isEmpty. Operand 13794 states and 21114 transitions. [2020-10-27 05:49:29,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 05:49:29,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:49:29,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:49:29,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:49:29,103 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:49:29,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:49:29,104 INFO L82 PathProgramCache]: Analyzing trace with hash -927996511, now seen corresponding path program 1 times [2020-10-27 05:49:29,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:49:29,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440696942] [2020-10-27 05:49:29,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:49:29,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:49:29,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:49:29,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:49:29,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:49:29,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:49:32,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:49:32,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 05:49:32,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:49:32,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3848 [2020-10-27 05:49:32,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:49:32,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:49:32,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:49:32,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 05:49:32,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:49:33,461 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:49:33,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:49:33,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:49:33,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:49:33,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:49:33,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:49:33,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:49:33,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:49:33,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:49:33,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:49:33,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:49:33,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:49:33,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:49:33,511 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 05:49:33,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440696942] [2020-10-27 05:49:33,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:49:33,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:49:33,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211412845] [2020-10-27 05:49:33,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:49:33,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:49:33,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:49:33,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:49:33,513 INFO L87 Difference]: Start difference. First operand 13794 states and 21114 transitions. Second operand 11 states. [2020-10-27 05:49:33,931 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-10-27 05:49:36,848 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 05:49:37,196 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:49:46,422 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:49:50,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:49:50,363 INFO L93 Difference]: Finished difference Result 98244 states and 151258 transitions. [2020-10-27 05:49:50,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 05:49:50,363 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 87 [2020-10-27 05:49:50,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:49:50,497 INFO L225 Difference]: With dead ends: 98244 [2020-10-27 05:49:50,498 INFO L226 Difference]: Without dead ends: 85476 [2020-10-27 05:49:50,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=296, Invalid=1110, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 05:49:50,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85476 states. [2020-10-27 05:49:53,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85476 to 14124. [2020-10-27 05:49:53,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14124 states. [2020-10-27 05:49:53,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14124 states to 14124 states and 21503 transitions. [2020-10-27 05:49:53,299 INFO L78 Accepts]: Start accepts. Automaton has 14124 states and 21503 transitions. Word has length 87 [2020-10-27 05:49:53,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:49:53,300 INFO L481 AbstractCegarLoop]: Abstraction has 14124 states and 21503 transitions. [2020-10-27 05:49:53,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:49:53,300 INFO L276 IsEmpty]: Start isEmpty. Operand 14124 states and 21503 transitions. [2020-10-27 05:49:53,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-27 05:49:53,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:49:53,308 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] [2020-10-27 05:49:53,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:49:53,308 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:49:53,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:49:53,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1599063834, now seen corresponding path program 1 times [2020-10-27 05:49:53,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:49:53,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647472674] [2020-10-27 05:49:53,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:49:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:49:53,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:49:53,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:49:53,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:49:53,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 05:49:53,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:49:53,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-27 05:49:53,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:49:53,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:49:53,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 05:49:53,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 05:49:53,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:49:54,166 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:49:54,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:49:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:49:54,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:49:54,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:49:54,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:49:54,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:49:54,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 05:49:54,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:49:54,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:49:54,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:49:54,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:49:54,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:49:54,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:49:54,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647472674] [2020-10-27 05:49:54,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:49:54,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:49:54,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724347653] [2020-10-27 05:49:54,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:49:54,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:49:54,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:49:54,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:49:54,205 INFO L87 Difference]: Start difference. First operand 14124 states and 21503 transitions. Second operand 8 states. [2020-10-27 05:49:54,608 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 185 [2020-10-27 05:49:56,531 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-27 05:49:56,926 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-27 05:49:57,279 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-27 05:49:57,589 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-27 05:50:04,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:50:04,878 INFO L93 Difference]: Finished difference Result 66225 states and 101861 transitions. [2020-10-27 05:50:04,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 05:50:04,878 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 88 [2020-10-27 05:50:04,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:50:04,946 INFO L225 Difference]: With dead ends: 66225 [2020-10-27 05:50:04,946 INFO L226 Difference]: Without dead ends: 53870 [2020-10-27 05:50:04,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:50:05,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53870 states. [2020-10-27 05:50:09,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53870 to 27055. [2020-10-27 05:50:09,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27055 states. [2020-10-27 05:50:09,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27055 states to 27055 states and 41100 transitions. [2020-10-27 05:50:09,429 INFO L78 Accepts]: Start accepts. Automaton has 27055 states and 41100 transitions. Word has length 88 [2020-10-27 05:50:09,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:50:09,429 INFO L481 AbstractCegarLoop]: Abstraction has 27055 states and 41100 transitions. [2020-10-27 05:50:09,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:50:09,429 INFO L276 IsEmpty]: Start isEmpty. Operand 27055 states and 41100 transitions. [2020-10-27 05:50:09,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 05:50:09,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:50:09,438 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] [2020-10-27 05:50:09,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:50:09,438 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:50:09,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:50:09,439 INFO L82 PathProgramCache]: Analyzing trace with hash -2027137687, now seen corresponding path program 1 times [2020-10-27 05:50:09,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:50:09,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861702460] [2020-10-27 05:50:09,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:50:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:50:09,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:09,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:50:09,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 05:50:09,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:50:09,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 207 [2020-10-27 05:50:09,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:50:09,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:50:09,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 90 [2020-10-27 05:50:09,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 05:50:09,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:50:10,012 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:50:10,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:50:10,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:50:10,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:10,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:50:10,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:50:10,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:50:10,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 05:50:10,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:50:10,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:50:10,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:50:10,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:50:10,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:50:10,047 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 05:50:10,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861702460] [2020-10-27 05:50:10,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:50:10,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:50:10,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851491558] [2020-10-27 05:50:10,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:50:10,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:50:10,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:50:10,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:50:10,054 INFO L87 Difference]: Start difference. First operand 27055 states and 41100 transitions. Second operand 5 states. [2020-10-27 05:50:19,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:50:19,474 INFO L93 Difference]: Finished difference Result 52402 states and 79662 transitions. [2020-10-27 05:50:19,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:50:19,475 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-10-27 05:50:19,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:50:19,534 INFO L225 Difference]: With dead ends: 52402 [2020-10-27 05:50:19,535 INFO L226 Difference]: Without dead ends: 52399 [2020-10-27 05:50:19,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:50:19,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52399 states. [2020-10-27 05:50:24,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52399 to 27695. [2020-10-27 05:50:24,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27695 states. [2020-10-27 05:50:24,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27695 states to 27695 states and 41740 transitions. [2020-10-27 05:50:24,175 INFO L78 Accepts]: Start accepts. Automaton has 27695 states and 41740 transitions. Word has length 89 [2020-10-27 05:50:24,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:50:24,175 INFO L481 AbstractCegarLoop]: Abstraction has 27695 states and 41740 transitions. [2020-10-27 05:50:24,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:50:24,176 INFO L276 IsEmpty]: Start isEmpty. Operand 27695 states and 41740 transitions. [2020-10-27 05:50:24,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 05:50:24,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:50:24,184 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] [2020-10-27 05:50:24,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:50:24,184 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:50:24,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:50:24,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1177850979, now seen corresponding path program 1 times [2020-10-27 05:50:24,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:50:24,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014329845] [2020-10-27 05:50:24,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:50:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:50:24,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:24,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:24,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:27,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:50:27,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 05:50:27,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:50:27,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3241 [2020-10-27 05:50:27,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:50:27,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:50:27,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:50:27,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 05:50:27,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:50:27,978 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:50:27,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:50:27,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:50:27,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:28,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:50:28,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:50:28,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:50:28,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:50:28,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:50:28,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:50:28,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:50:28,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:50:28,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:50:28,047 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 05:50:28,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014329845] [2020-10-27 05:50:28,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:50:28,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:50:28,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998963990] [2020-10-27 05:50:28,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:50:28,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:50:28,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:50:28,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:50:28,049 INFO L87 Difference]: Start difference. First operand 27695 states and 41740 transitions. Second operand 10 states. [2020-10-27 05:50:28,437 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification that was a NOOP. DAG size: 188 [2020-10-27 05:50:31,521 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-27 05:50:47,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:50:47,030 INFO L93 Difference]: Finished difference Result 117777 states and 178534 transitions. [2020-10-27 05:50:47,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 05:50:47,031 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 90 [2020-10-27 05:50:47,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:50:47,154 INFO L225 Difference]: With dead ends: 117777 [2020-10-27 05:50:47,154 INFO L226 Difference]: Without dead ends: 90785 [2020-10-27 05:50:47,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-27 05:50:47,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90785 states. [2020-10-27 05:50:54,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90785 to 38058. [2020-10-27 05:50:54,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38058 states. [2020-10-27 05:50:54,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38058 states to 38058 states and 57478 transitions. [2020-10-27 05:50:54,719 INFO L78 Accepts]: Start accepts. Automaton has 38058 states and 57478 transitions. Word has length 90 [2020-10-27 05:50:54,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:50:54,719 INFO L481 AbstractCegarLoop]: Abstraction has 38058 states and 57478 transitions. [2020-10-27 05:50:54,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:50:54,719 INFO L276 IsEmpty]: Start isEmpty. Operand 38058 states and 57478 transitions. [2020-10-27 05:50:54,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 05:50:54,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:50:54,728 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] [2020-10-27 05:50:54,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:50:54,729 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:50:54,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:50:54,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1624864401, now seen corresponding path program 1 times [2020-10-27 05:50:54,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:50:54,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094041861] [2020-10-27 05:50:54,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:50:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:50:54,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:54,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:50:54,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 05:50:54,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:50:54,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-27 05:50:54,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:50:54,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:50:54,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:50:54,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 05:50:54,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:50:55,247 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 05:50:55,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:50:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:50:55,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:50:55,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:50:55,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:50:55,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:50:55,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 05:50:55,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:50:55,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:50:55,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:50:55,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:50:55,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:50:55,280 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 05:50:55,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094041861] [2020-10-27 05:50:55,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:50:55,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:50:55,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573644322] [2020-10-27 05:50:55,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:50:55,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:50:55,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:50:55,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:50:55,281 INFO L87 Difference]: Start difference. First operand 38058 states and 57478 transitions. Second operand 5 states. [2020-10-27 05:50:55,662 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 05:50:57,520 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-10-27 05:51:10,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:51:10,627 INFO L93 Difference]: Finished difference Result 105080 states and 158746 transitions. [2020-10-27 05:51:10,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:51:10,628 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 90 [2020-10-27 05:51:10,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:51:10,735 INFO L225 Difference]: With dead ends: 105080 [2020-10-27 05:51:10,736 INFO L226 Difference]: Without dead ends: 69509 [2020-10-27 05:51:10,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:51:10,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69509 states. [2020-10-27 05:51:24,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69509 to 69074. [2020-10-27 05:51:24,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69074 states. [2020-10-27 05:51:24,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69074 states to 69074 states and 103382 transitions. [2020-10-27 05:51:24,297 INFO L78 Accepts]: Start accepts. Automaton has 69074 states and 103382 transitions. Word has length 90 [2020-10-27 05:51:24,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:51:24,297 INFO L481 AbstractCegarLoop]: Abstraction has 69074 states and 103382 transitions. [2020-10-27 05:51:24,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:51:24,297 INFO L276 IsEmpty]: Start isEmpty. Operand 69074 states and 103382 transitions. [2020-10-27 05:51:24,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 05:51:24,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:51:24,305 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] [2020-10-27 05:51:24,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:51:24,306 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:51:24,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:51:24,306 INFO L82 PathProgramCache]: Analyzing trace with hash -694424790, now seen corresponding path program 1 times [2020-10-27 05:51:24,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:51:24,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832883680] [2020-10-27 05:51:24,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:51:24,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:51:24,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:24,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:24,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:51:26,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:51:26,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 05:51:26,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:51:26,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2073 [2020-10-27 05:51:26,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:51:26,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:51:26,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:51:26,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 05:51:26,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0