/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=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:36:48,423 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:36:48,426 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:36:48,485 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:36:48,486 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:36:48,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:36:48,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:36:48,500 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:36:48,503 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:36:48,510 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:36:48,511 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:36:48,512 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:36:48,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:36:48,516 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:36:48,519 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:36:48,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:36:48,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:36:48,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:36:48,534 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:36:48,542 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:36:48,544 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:36:48,546 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:36:48,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:36:48,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:36:48,558 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:36:48,559 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:36:48,559 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:36:48,562 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:36:48,562 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:36:48,564 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:36:48,564 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:36:48,565 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:36:48,567 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:36:48,568 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:36:48,569 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:36:48,570 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:36:48,571 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:36:48,571 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:36:48,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:36:48,573 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:36:48,574 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:36:48,582 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 00:36:48,637 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:36:48,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:36:48,642 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:36:48,642 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:36:48,643 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:36:48,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:36:48,643 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:36:48,644 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:36:48,644 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:36:48,644 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:36:48,645 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:36:48,646 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:36:48,646 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:36:48,646 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:36:48,646 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:36:48,647 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:36:48,647 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:36:48,647 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:36:48,647 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:36:48,647 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:36:48,648 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:36:48,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:36:48,648 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:36:48,648 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:36:48,649 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:36:48,649 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:36:48,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:36:48,649 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:36:48,649 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:36:48,650 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:36:49,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:36:49,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:36:49,141 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:36:49,143 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:36:49,143 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:36:49,144 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 00:36:49,235 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d1d7b814/8880f23e6626458ca07d28af60c86fc2/FLAG54a77deb7 [2020-10-28 00:36:50,099 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:36:50,100 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 00:36:50,129 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d1d7b814/8880f23e6626458ca07d28af60c86fc2/FLAG54a77deb7 [2020-10-28 00:36:50,281 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0d1d7b814/8880f23e6626458ca07d28af60c86fc2 [2020-10-28 00:36:50,286 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:36:50,292 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:36:50,294 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:36:50,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:36:50,298 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:36:50,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:36:50" (1/1) ... [2020-10-28 00:36:50,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52cbe57f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:36:50, skipping insertion in model container [2020-10-28 00:36:50,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:36:50" (1/1) ... [2020-10-28 00:36:50,311 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:36:50,409 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:36:51,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:36:51,554 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:36:51,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:36:52,024 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:36:52,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:36:52 WrapperNode [2020-10-28 00:36:52,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:36:52,026 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:36:52,026 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:36:52,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:36:52,042 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:36:52" (1/1) ... [2020-10-28 00:36:52,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:36:52" (1/1) ... [2020-10-28 00:36:52,069 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:36:52" (1/1) ... [2020-10-28 00:36:52,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:36:52" (1/1) ... [2020-10-28 00:36:52,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:36:52" (1/1) ... [2020-10-28 00:36:52,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:36:52" (1/1) ... [2020-10-28 00:36:52,174 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:36:52" (1/1) ... [2020-10-28 00:36:52,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:36:52,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:36:52,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:36:52,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:36:52,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:36:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:36:52,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:36:52,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:36:52,279 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:36:52,279 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:36:52,280 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:36:52,280 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:36:52,280 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:36:52,280 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:36:52,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:36:52,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:36:52,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 00:36:52,281 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:36:52,281 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:36:52,281 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:36:52,281 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:36:52,281 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:36:52,282 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:36:52,282 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:36:52,282 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:36:52,282 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:36:52,282 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:36:52,282 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:36:52,283 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:36:52,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:36:52,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:36:52,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:36:52,283 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:36:52,283 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:36:52,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:36:55,663 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:36:55,663 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:36:55,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:36:55 BoogieIcfgContainer [2020-10-28 00:36:55,667 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:36:55,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:36:55,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:36:55,677 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:36:55,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:36:50" (1/3) ... [2020-10-28 00:36:55,679 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40ac6c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:36:55, skipping insertion in model container [2020-10-28 00:36:55,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:36:52" (2/3) ... [2020-10-28 00:36:55,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40ac6c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:36:55, skipping insertion in model container [2020-10-28 00:36:55,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:36:55" (3/3) ... [2020-10-28 00:36:55,681 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.4.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 00:36:55,695 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:36:55,702 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:36:55,717 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:36:55,770 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:36:55,770 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:36:55,770 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:36:55,770 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:36:55,770 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:36:55,770 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:36:55,771 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:36:55,771 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:36:55,820 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states. [2020-10-28 00:36:55,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-28 00:36:55,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:36:55,872 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:36:55,873 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:36:55,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:36:55,883 INFO L82 PathProgramCache]: Analyzing trace with hash 253401268, now seen corresponding path program 1 times [2020-10-28 00:36:55,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:36:55,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821923475] [2020-10-28 00:36:55,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:36:56,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:36:56,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:57,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:57,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:58,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:58,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:59,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:59,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:59,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:59,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:36:59,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:00,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:00,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:00,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:01,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:01,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:01,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:01,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:37:01,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 335 [2020-10-28 00:37:01,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 00:37:01,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5180 [2020-10-28 00:37:01,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:37:01,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:37:01,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-28 00:37:01,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 213 [2020-10-28 00:37:01,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:37:03,038 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 00:37:03,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:37:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:37:03,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:03,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:37:03,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:37:03,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:37:03,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-28 00:37:03,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:37:03,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:37:03,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:37:03,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:37:03,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:37:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:37:03,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821923475] [2020-10-28 00:37:03,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:37:03,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:37:03,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589729568] [2020-10-28 00:37:03,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:37:03,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:37:03,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:37:03,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:37:03,363 INFO L87 Difference]: Start difference. First operand 793 states. Second operand 4 states. [2020-10-28 00:37:04,212 WARN L193 SmtUtils]: Spent 744.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2020-10-28 00:37:10,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:37:10,201 INFO L93 Difference]: Finished difference Result 1495 states and 2629 transitions. [2020-10-28 00:37:10,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:37:10,204 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-10-28 00:37:10,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:37:10,241 INFO L225 Difference]: With dead ends: 1495 [2020-10-28 00:37:10,241 INFO L226 Difference]: Without dead ends: 1275 [2020-10-28 00:37:10,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:37:10,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2020-10-28 00:37:10,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1272. [2020-10-28 00:37:10,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1272 states. [2020-10-28 00:37:10,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1979 transitions. [2020-10-28 00:37:10,422 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1979 transitions. Word has length 327 [2020-10-28 00:37:10,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:37:10,424 INFO L481 AbstractCegarLoop]: Abstraction has 1272 states and 1979 transitions. [2020-10-28 00:37:10,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:37:10,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1979 transitions. [2020-10-28 00:37:10,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-28 00:37:10,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:37:10,432 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:37:10,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:37:10,433 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:37:10,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:37:10,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1052447530, now seen corresponding path program 1 times [2020-10-28 00:37:10,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:37:10,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59966746] [2020-10-28 00:37:10,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:37:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:37:10,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:10,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:11,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:11,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:11,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:12,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:12,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:12,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:12,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:12,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:12,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:13,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:13,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:13,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:13,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:13,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:15,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:37:15,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 335 [2020-10-28 00:37:15,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 00:37:15,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-28 00:37:15,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:37:15,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:37:15,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-28 00:37:15,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 237 [2020-10-28 00:37:15,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:37:16,557 WARN L193 SmtUtils]: Spent 735.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 00:37:16,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:37:16,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:37:16,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:16,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:37:16,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:37:16,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:37:16,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 00:37:16,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:37:16,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:37:16,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:37:16,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:37:16,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:37:16,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:37:16,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59966746] [2020-10-28 00:37:16,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:37:16,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:37:16,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127771712] [2020-10-28 00:37:16,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:37:16,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:37:16,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:37:16,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:37:16,824 INFO L87 Difference]: Start difference. First operand 1272 states and 1979 transitions. Second operand 4 states. [2020-10-28 00:37:17,560 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2020-10-28 00:37:22,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:37:22,890 INFO L93 Difference]: Finished difference Result 2522 states and 3952 transitions. [2020-10-28 00:37:22,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:37:22,891 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-10-28 00:37:22,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:37:22,907 INFO L225 Difference]: With dead ends: 2522 [2020-10-28 00:37:22,907 INFO L226 Difference]: Without dead ends: 2187 [2020-10-28 00:37:22,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:37:22,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2020-10-28 00:37:23,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 2184. [2020-10-28 00:37:23,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2184 states. [2020-10-28 00:37:23,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 3389 transitions. [2020-10-28 00:37:23,023 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 3389 transitions. Word has length 327 [2020-10-28 00:37:23,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:37:23,025 INFO L481 AbstractCegarLoop]: Abstraction has 2184 states and 3389 transitions. [2020-10-28 00:37:23,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:37:23,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 3389 transitions. [2020-10-28 00:37:23,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-28 00:37:23,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:37:23,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:37:23,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:37:23,037 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:37:23,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:37:23,038 INFO L82 PathProgramCache]: Analyzing trace with hash 2112533621, now seen corresponding path program 1 times [2020-10-28 00:37:23,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:37:23,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992945578] [2020-10-28 00:37:23,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:37:23,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:37:23,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:23,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:23,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:24,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:24,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:24,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:24,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:24,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:24,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:24,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:25,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:25,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:25,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:25,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:26,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:26,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:28,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:37:28,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 335 [2020-10-28 00:37:28,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 00:37:28,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5068 [2020-10-28 00:37:28,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:37:28,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:37:28,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:37:28,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-28 00:37:28,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:37:29,135 WARN L193 SmtUtils]: Spent 656.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 00:37:29,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:37:29,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:37:29,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:29,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:37:29,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:37:29,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:37:29,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 00:37:29,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:37:29,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:37:29,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:37:29,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:37:29,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:37:29,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:37:29,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992945578] [2020-10-28 00:37:29,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:37:29,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:37:29,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001422918] [2020-10-28 00:37:29,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:37:29,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:37:29,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:37:29,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:37:29,394 INFO L87 Difference]: Start difference. First operand 2184 states and 3389 transitions. Second operand 5 states. [2020-10-28 00:37:35,834 WARN L193 SmtUtils]: Spent 740.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 00:37:38,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:37:38,070 INFO L93 Difference]: Finished difference Result 6401 states and 9910 transitions. [2020-10-28 00:37:38,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:37:38,075 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 327 [2020-10-28 00:37:38,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:37:38,097 INFO L225 Difference]: With dead ends: 6401 [2020-10-28 00:37:38,098 INFO L226 Difference]: Without dead ends: 4258 [2020-10-28 00:37:38,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:37:38,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4258 states. [2020-10-28 00:37:38,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4258 to 4255. [2020-10-28 00:37:38,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4255 states. [2020-10-28 00:37:38,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4255 states to 4255 states and 6555 transitions. [2020-10-28 00:37:38,315 INFO L78 Accepts]: Start accepts. Automaton has 4255 states and 6555 transitions. Word has length 327 [2020-10-28 00:37:38,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:37:38,316 INFO L481 AbstractCegarLoop]: Abstraction has 4255 states and 6555 transitions. [2020-10-28 00:37:38,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:37:38,316 INFO L276 IsEmpty]: Start isEmpty. Operand 4255 states and 6555 transitions. [2020-10-28 00:37:38,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-10-28 00:37:38,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:37:38,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:37:38,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:37:38,329 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:37:38,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:37:38,330 INFO L82 PathProgramCache]: Analyzing trace with hash -2026796231, now seen corresponding path program 1 times [2020-10-28 00:37:38,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:37:38,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166993570] [2020-10-28 00:37:38,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:37:38,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:37:38,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:38,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:38,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:38,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:39,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:39,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:39,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:39,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:39,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:39,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:39,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:40,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:40,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:40,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:40,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:40,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:43,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:37:43,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 337 [2020-10-28 00:37:43,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 00:37:43,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-28 00:37:43,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:37:43,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:37:43,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 00:37:43,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 00:37:43,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:37:44,230 WARN L193 SmtUtils]: Spent 699.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 00:37:44,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:37:44,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:37:44,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:44,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:37:44,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:37:44,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:37:44,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 00:37:44,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:37:44,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:37:44,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:37:44,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:37:44,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:37:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:37:44,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166993570] [2020-10-28 00:37:44,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:37:44,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:37:44,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326371498] [2020-10-28 00:37:44,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:37:44,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:37:44,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:37:44,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:37:44,389 INFO L87 Difference]: Start difference. First operand 4255 states and 6555 transitions. Second operand 4 states. [2020-10-28 00:37:49,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:37:49,884 INFO L93 Difference]: Finished difference Result 12614 states and 19404 transitions. [2020-10-28 00:37:49,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 00:37:49,889 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 329 [2020-10-28 00:37:49,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:37:49,934 INFO L225 Difference]: With dead ends: 12614 [2020-10-28 00:37:49,934 INFO L226 Difference]: Without dead ends: 8433 [2020-10-28 00:37:49,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:37:49,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8433 states. [2020-10-28 00:37:50,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8433 to 4267. [2020-10-28 00:37:50,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4267 states. [2020-10-28 00:37:50,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4267 states to 4267 states and 6572 transitions. [2020-10-28 00:37:50,230 INFO L78 Accepts]: Start accepts. Automaton has 4267 states and 6572 transitions. Word has length 329 [2020-10-28 00:37:50,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:37:50,230 INFO L481 AbstractCegarLoop]: Abstraction has 4267 states and 6572 transitions. [2020-10-28 00:37:50,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:37:50,231 INFO L276 IsEmpty]: Start isEmpty. Operand 4267 states and 6572 transitions. [2020-10-28 00:37:50,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-10-28 00:37:50,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:37:50,242 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:37:50,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:37:50,243 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:37:50,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:37:50,243 INFO L82 PathProgramCache]: Analyzing trace with hash 827665118, now seen corresponding path program 1 times [2020-10-28 00:37:50,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:37:50,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427564804] [2020-10-28 00:37:50,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:37:50,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:37:50,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:50,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:50,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:50,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:50,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:51,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:51,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:51,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:51,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:51,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:51,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:51,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:52,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:52,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:52,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:55,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:37:55,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 337 [2020-10-28 00:37:55,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 00:37:55,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 00:37:55,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:37:55,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:37:55,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 00:37:55,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 160 [2020-10-28 00:37:55,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:37:56,165 WARN L193 SmtUtils]: Spent 734.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 00:37:56,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:37:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:37:56,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:37:56,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:37:56,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:37:56,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:37:56,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 00:37:56,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:37:56,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:37:56,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:37:56,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:37:56,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:37:56,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:37:56,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427564804] [2020-10-28 00:37:56,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:37:56,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:37:56,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082473273] [2020-10-28 00:37:56,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:37:56,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:37:56,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:37:56,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:37:56,376 INFO L87 Difference]: Start difference. First operand 4267 states and 6572 transitions. Second operand 4 states. [2020-10-28 00:38:04,410 WARN L193 SmtUtils]: Spent 759.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-10-28 00:38:06,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:38:06,539 INFO L93 Difference]: Finished difference Result 12482 states and 19166 transitions. [2020-10-28 00:38:06,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:38:06,540 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 329 [2020-10-28 00:38:06,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:38:06,578 INFO L225 Difference]: With dead ends: 12482 [2020-10-28 00:38:06,578 INFO L226 Difference]: Without dead ends: 8349 [2020-10-28 00:38:06,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:38:06,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8349 states. [2020-10-28 00:38:06,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8349 to 8345. [2020-10-28 00:38:06,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8345 states. [2020-10-28 00:38:06,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8345 states to 8345 states and 12770 transitions. [2020-10-28 00:38:06,951 INFO L78 Accepts]: Start accepts. Automaton has 8345 states and 12770 transitions. Word has length 329 [2020-10-28 00:38:06,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:38:06,951 INFO L481 AbstractCegarLoop]: Abstraction has 8345 states and 12770 transitions. [2020-10-28 00:38:06,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:38:06,952 INFO L276 IsEmpty]: Start isEmpty. Operand 8345 states and 12770 transitions. [2020-10-28 00:38:06,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-10-28 00:38:06,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:38:06,971 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:38:06,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:38:06,971 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:38:06,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:38:06,972 INFO L82 PathProgramCache]: Analyzing trace with hash 475825556, now seen corresponding path program 1 times [2020-10-28 00:38:06,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:38:06,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051617857] [2020-10-28 00:38:06,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:38:07,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:38:07,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:07,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:07,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:07,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:07,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:07,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:07,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:07,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:07,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:08,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:08,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:08,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:08,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:08,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:10,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:10,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:12,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:38:12,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 338 [2020-10-28 00:38:12,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 00:38:12,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 00:38:12,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:38:12,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:38:12,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 00:38:12,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 00:38:12,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:38:12,835 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 00:38:12,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:38:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:38:12,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:12,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:38:12,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:38:12,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:38:12,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:38:12,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:38:12,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:38:12,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:38:12,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:38:12,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:38:13,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:38:13,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051617857] [2020-10-28 00:38:13,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:38:13,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:38:13,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082133033] [2020-10-28 00:38:13,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:38:13,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:38:13,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:38:13,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:38:13,104 INFO L87 Difference]: Start difference. First operand 8345 states and 12770 transitions. Second operand 4 states. [2020-10-28 00:38:21,306 WARN L193 SmtUtils]: Spent 716.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-10-28 00:38:23,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:38:23,483 INFO L93 Difference]: Finished difference Result 23646 states and 36091 transitions. [2020-10-28 00:38:23,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:38:23,485 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-10-28 00:38:23,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:38:23,520 INFO L225 Difference]: With dead ends: 23646 [2020-10-28 00:38:23,520 INFO L226 Difference]: Without dead ends: 15511 [2020-10-28 00:38:23,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:38:23,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15511 states. [2020-10-28 00:38:24,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15511 to 15508. [2020-10-28 00:38:24,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15508 states. [2020-10-28 00:38:24,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15508 states to 15508 states and 23557 transitions. [2020-10-28 00:38:24,237 INFO L78 Accepts]: Start accepts. Automaton has 15508 states and 23557 transitions. Word has length 330 [2020-10-28 00:38:24,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:38:24,238 INFO L481 AbstractCegarLoop]: Abstraction has 15508 states and 23557 transitions. [2020-10-28 00:38:24,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:38:24,238 INFO L276 IsEmpty]: Start isEmpty. Operand 15508 states and 23557 transitions. [2020-10-28 00:38:24,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-10-28 00:38:24,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:38:24,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:38:24,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:38:24,268 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:38:24,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:38:24,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1632439401, now seen corresponding path program 1 times [2020-10-28 00:38:24,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:38:24,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [586496747] [2020-10-28 00:38:24,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:38:24,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:38:24,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:24,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:24,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:24,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:24,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:24,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:25,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:25,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:25,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:25,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:25,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:25,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:25,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:25,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:26,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:26,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:26,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:29,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:38:29,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 338 [2020-10-28 00:38:29,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 00:38:29,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 00:38:29,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:38:29,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:38:29,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 00:38:29,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 00:38:29,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:38:30,191 WARN L193 SmtUtils]: Spent 710.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 00:38:30,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:38:30,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:38:30,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:30,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:38:30,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:38:30,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:38:30,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:38:30,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:38:30,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:38:30,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:38:30,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:38:30,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:38:30,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:38:30,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [586496747] [2020-10-28 00:38:30,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:38:30,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:38:30,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184115355] [2020-10-28 00:38:30,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:38:30,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:38:30,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:38:30,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:38:30,340 INFO L87 Difference]: Start difference. First operand 15508 states and 23557 transitions. Second operand 5 states. [2020-10-28 00:38:39,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:38:39,802 INFO L93 Difference]: Finished difference Result 44325 states and 67081 transitions. [2020-10-28 00:38:39,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:38:39,803 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2020-10-28 00:38:39,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:38:39,868 INFO L225 Difference]: With dead ends: 44325 [2020-10-28 00:38:39,868 INFO L226 Difference]: Without dead ends: 29526 [2020-10-28 00:38:39,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:38:39,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29526 states. [2020-10-28 00:38:40,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29526 to 15824. [2020-10-28 00:38:40,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15824 states. [2020-10-28 00:38:40,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15824 states to 15824 states and 24095 transitions. [2020-10-28 00:38:40,950 INFO L78 Accepts]: Start accepts. Automaton has 15824 states and 24095 transitions. Word has length 330 [2020-10-28 00:38:40,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:38:40,950 INFO L481 AbstractCegarLoop]: Abstraction has 15824 states and 24095 transitions. [2020-10-28 00:38:40,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:38:40,951 INFO L276 IsEmpty]: Start isEmpty. Operand 15824 states and 24095 transitions. [2020-10-28 00:38:40,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-10-28 00:38:40,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:38:40,978 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:38:40,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:38:40,978 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:38:40,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:38:40,979 INFO L82 PathProgramCache]: Analyzing trace with hash 137478783, now seen corresponding path program 1 times [2020-10-28 00:38:40,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:38:40,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724999200] [2020-10-28 00:38:40,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:38:41,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:38:41,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:41,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:41,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:41,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:41,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:41,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:41,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:41,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:41,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:41,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:41,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:42,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:42,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:42,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:42,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:42,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:46,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:38:46,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 340 [2020-10-28 00:38:46,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 00:38:46,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 00:38:46,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:38:46,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:38:46,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 00:38:46,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 00:38:46,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:38:46,766 WARN L193 SmtUtils]: Spent 664.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 00:38:46,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:38:46,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:38:46,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:46,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:38:46,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:38:46,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:38:46,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:38:46,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:38:46,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:38:46,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:38:46,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:38:46,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:38:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:38:46,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724999200] [2020-10-28 00:38:46,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:38:46,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:38:46,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301306119] [2020-10-28 00:38:46,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:38:46,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:38:46,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:38:46,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:38:46,901 INFO L87 Difference]: Start difference. First operand 15824 states and 24095 transitions. Second operand 4 states. [2020-10-28 00:38:53,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:38:53,098 INFO L93 Difference]: Finished difference Result 45432 states and 68713 transitions. [2020-10-28 00:38:53,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 00:38:53,099 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-10-28 00:38:53,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:38:53,169 INFO L225 Difference]: With dead ends: 45432 [2020-10-28 00:38:53,170 INFO L226 Difference]: Without dead ends: 30623 [2020-10-28 00:38:53,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:38:53,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30623 states. [2020-10-28 00:38:54,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30623 to 15926. [2020-10-28 00:38:54,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15926 states. [2020-10-28 00:38:54,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15926 states to 15926 states and 24230 transitions. [2020-10-28 00:38:54,283 INFO L78 Accepts]: Start accepts. Automaton has 15926 states and 24230 transitions. Word has length 332 [2020-10-28 00:38:54,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:38:54,283 INFO L481 AbstractCegarLoop]: Abstraction has 15926 states and 24230 transitions. [2020-10-28 00:38:54,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:38:54,283 INFO L276 IsEmpty]: Start isEmpty. Operand 15926 states and 24230 transitions. [2020-10-28 00:38:54,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-28 00:38:54,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:38:54,323 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:38:54,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:38:54,323 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:38:54,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:38:54,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1340281627, now seen corresponding path program 1 times [2020-10-28 00:38:54,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:38:54,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309429579] [2020-10-28 00:38:54,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:38:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:38:54,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:54,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:54,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:54,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:55,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:55,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:55,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:55,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:55,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:55,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:55,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:56,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:56,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:57,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:58,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:58,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:59,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:38:59,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 341 [2020-10-28 00:38:59,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 00:38:59,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 00:38:59,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:38:59,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:38:59,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 104 [2020-10-28 00:38:59,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 00:38:59,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:39:00,252 WARN L193 SmtUtils]: Spent 752.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 00:39:00,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:39:00,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:39:00,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:00,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:39:00,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:39:00,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:39:00,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:39:00,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:39:00,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:39:00,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:39:00,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:39:00,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:39:00,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:39:00,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309429579] [2020-10-28 00:39:00,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:39:00,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:39:00,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576424259] [2020-10-28 00:39:00,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:39:00,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:39:00,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:39:00,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:39:00,356 INFO L87 Difference]: Start difference. First operand 15926 states and 24230 transitions. Second operand 4 states. [2020-10-28 00:39:07,726 WARN L193 SmtUtils]: Spent 761.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-10-28 00:39:08,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:39:08,497 INFO L93 Difference]: Finished difference Result 37762 states and 57890 transitions. [2020-10-28 00:39:08,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:39:08,497 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-10-28 00:39:08,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:39:08,532 INFO L225 Difference]: With dead ends: 37762 [2020-10-28 00:39:08,532 INFO L226 Difference]: Without dead ends: 23955 [2020-10-28 00:39:08,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:39:08,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23955 states. [2020-10-28 00:39:09,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23955 to 19782. [2020-10-28 00:39:09,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19782 states. [2020-10-28 00:39:09,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19782 states to 19782 states and 30541 transitions. [2020-10-28 00:39:09,775 INFO L78 Accepts]: Start accepts. Automaton has 19782 states and 30541 transitions. Word has length 333 [2020-10-28 00:39:09,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:39:09,776 INFO L481 AbstractCegarLoop]: Abstraction has 19782 states and 30541 transitions. [2020-10-28 00:39:09,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:39:09,776 INFO L276 IsEmpty]: Start isEmpty. Operand 19782 states and 30541 transitions. [2020-10-28 00:39:09,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-28 00:39:09,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:39:09,798 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:39:09,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:39:09,799 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:39:09,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:39:09,799 INFO L82 PathProgramCache]: Analyzing trace with hash 2135388841, now seen corresponding path program 1 times [2020-10-28 00:39:09,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:39:09,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971042179] [2020-10-28 00:39:09,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:39:09,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:39:09,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:09,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:09,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:10,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:10,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:10,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:10,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:10,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:10,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:10,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:10,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:11,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:11,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:11,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:11,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:11,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:12,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:12,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:14,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:39:14,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 341 [2020-10-28 00:39:14,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 00:39:14,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 00:39:14,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:39:14,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:39:14,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-28 00:39:14,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 00:39:14,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:39:15,644 WARN L193 SmtUtils]: Spent 667.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 00:39:15,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:39:15,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:39:15,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:15,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:39:15,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:39:15,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:39:15,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:39:15,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:39:15,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:39:15,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:39:15,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:39:15,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:39:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:39:15,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971042179] [2020-10-28 00:39:15,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:39:15,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:39:15,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306721234] [2020-10-28 00:39:15,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:39:15,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:39:15,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:39:15,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:39:15,752 INFO L87 Difference]: Start difference. First operand 19782 states and 30541 transitions. Second operand 5 states. [2020-10-28 00:39:21,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:39:21,277 INFO L93 Difference]: Finished difference Result 37074 states and 57048 transitions. [2020-10-28 00:39:21,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:39:21,279 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 333 [2020-10-28 00:39:21,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:39:21,302 INFO L225 Difference]: With dead ends: 37074 [2020-10-28 00:39:21,302 INFO L226 Difference]: Without dead ends: 18523 [2020-10-28 00:39:21,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:39:21,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18523 states. [2020-10-28 00:39:22,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18523 to 18465. [2020-10-28 00:39:22,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18465 states. [2020-10-28 00:39:22,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18465 states to 18465 states and 28514 transitions. [2020-10-28 00:39:22,293 INFO L78 Accepts]: Start accepts. Automaton has 18465 states and 28514 transitions. Word has length 333 [2020-10-28 00:39:22,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:39:22,293 INFO L481 AbstractCegarLoop]: Abstraction has 18465 states and 28514 transitions. [2020-10-28 00:39:22,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:39:22,294 INFO L276 IsEmpty]: Start isEmpty. Operand 18465 states and 28514 transitions. [2020-10-28 00:39:22,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-10-28 00:39:22,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:39:22,308 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:39:22,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:39:22,309 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:39:22,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:39:22,309 INFO L82 PathProgramCache]: Analyzing trace with hash -329850587, now seen corresponding path program 1 times [2020-10-28 00:39:22,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:39:22,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734394196] [2020-10-28 00:39:22,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:39:22,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:39:22,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:22,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:22,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:22,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:22,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:22,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:23,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:23,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:23,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:23,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:23,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:23,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:23,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:23,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:25,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:25,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:25,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:27,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:39:27,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 342 [2020-10-28 00:39:27,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 00:39:27,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 00:39:27,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:39:27,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:39:27,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 104 [2020-10-28 00:39:27,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 00:39:27,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:39:28,153 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 00:39:28,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:39:28,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:39:28,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:28,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:39:28,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:39:28,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:39:28,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:39:28,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:39:28,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:39:28,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:39:28,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:39:28,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:39:28,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:39:28,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734394196] [2020-10-28 00:39:28,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:39:28,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:39:28,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597837335] [2020-10-28 00:39:28,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:39:28,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:39:28,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:39:28,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:39:28,248 INFO L87 Difference]: Start difference. First operand 18465 states and 28514 transitions. Second operand 4 states. [2020-10-28 00:39:36,102 WARN L193 SmtUtils]: Spent 707.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-10-28 00:39:36,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:39:36,554 INFO L93 Difference]: Finished difference Result 44414 states and 69300 transitions. [2020-10-28 00:39:36,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:39:36,554 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-10-28 00:39:36,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:39:36,588 INFO L225 Difference]: With dead ends: 44414 [2020-10-28 00:39:36,589 INFO L226 Difference]: Without dead ends: 27640 [2020-10-28 00:39:36,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:39:36,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27640 states. [2020-10-28 00:39:37,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27640 to 24773. [2020-10-28 00:39:37,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24773 states. [2020-10-28 00:39:37,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24773 states to 24773 states and 38868 transitions. [2020-10-28 00:39:37,993 INFO L78 Accepts]: Start accepts. Automaton has 24773 states and 38868 transitions. Word has length 334 [2020-10-28 00:39:37,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:39:37,994 INFO L481 AbstractCegarLoop]: Abstraction has 24773 states and 38868 transitions. [2020-10-28 00:39:37,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:39:37,994 INFO L276 IsEmpty]: Start isEmpty. Operand 24773 states and 38868 transitions. [2020-10-28 00:39:38,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-10-28 00:39:38,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:39:38,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:39:38,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:39:38,013 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:39:38,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:39:38,014 INFO L82 PathProgramCache]: Analyzing trace with hash -333891102, now seen corresponding path program 1 times [2020-10-28 00:39:38,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:39:38,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209606278] [2020-10-28 00:39:38,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:39:38,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:39:38,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:38,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:38,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:38,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:38,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:38,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:38,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:38,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:39,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:39,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:39,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:39,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:39,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:40,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:40,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:40,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:43,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:39:43,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 344 [2020-10-28 00:39:43,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 00:39:43,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-28 00:39:43,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:39:43,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:39:43,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 00:39:43,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-28 00:39:43,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:39:43,923 WARN L193 SmtUtils]: Spent 657.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 00:39:43,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:39:43,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:39:43,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:43,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:39:43,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:39:43,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:39:43,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:39:43,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:39:43,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:39:43,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:39:43,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:39:43,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:39:44,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:39:44,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209606278] [2020-10-28 00:39:44,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:39:44,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:39:44,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802713388] [2020-10-28 00:39:44,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:39:44,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:39:44,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:39:44,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:39:44,063 INFO L87 Difference]: Start difference. First operand 24773 states and 38868 transitions. Second operand 5 states. [2020-10-28 00:39:51,987 WARN L193 SmtUtils]: Spent 785.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 00:39:55,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:39:55,659 INFO L93 Difference]: Finished difference Result 73000 states and 114393 transitions. [2020-10-28 00:39:55,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:39:55,660 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 336 [2020-10-28 00:39:55,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:39:55,713 INFO L225 Difference]: With dead ends: 73000 [2020-10-28 00:39:55,713 INFO L226 Difference]: Without dead ends: 48438 [2020-10-28 00:39:55,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:39:55,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48438 states. [2020-10-28 00:39:58,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48438 to 48435. [2020-10-28 00:39:58,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48435 states. [2020-10-28 00:39:58,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48435 states to 48435 states and 75508 transitions. [2020-10-28 00:39:58,716 INFO L78 Accepts]: Start accepts. Automaton has 48435 states and 75508 transitions. Word has length 336 [2020-10-28 00:39:58,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:39:58,716 INFO L481 AbstractCegarLoop]: Abstraction has 48435 states and 75508 transitions. [2020-10-28 00:39:58,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:39:58,716 INFO L276 IsEmpty]: Start isEmpty. Operand 48435 states and 75508 transitions. [2020-10-28 00:39:58,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-10-28 00:39:58,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:39:58,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:39:58,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:39:58,737 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:39:58,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:39:58,738 INFO L82 PathProgramCache]: Analyzing trace with hash 457055382, now seen corresponding path program 1 times [2020-10-28 00:39:58,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:39:58,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896629558] [2020-10-28 00:39:58,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:39:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:39:58,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:58,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:58,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:59,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:59,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:59,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:59,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:59,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:59,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:59,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:59,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:00,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:00,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:00,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:00,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:03,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:03,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:40:03,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 346 [2020-10-28 00:40:03,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 00:40:03,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 00:40:03,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:40:03,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:40:03,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 00:40:03,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 00:40:03,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:40:04,575 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 00:40:04,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:40:04,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:40:04,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:04,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:40:04,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:40:04,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:40:04,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:40:04,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:40:04,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:40:04,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:40:04,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:40:04,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:40:04,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:40:04,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896629558] [2020-10-28 00:40:04,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:40:04,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:40:04,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609477620] [2020-10-28 00:40:04,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:40:04,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:40:04,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:40:04,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:40:04,742 INFO L87 Difference]: Start difference. First operand 48435 states and 75508 transitions. Second operand 4 states. [2020-10-28 00:40:14,490 WARN L193 SmtUtils]: Spent 762.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-10-28 00:40:19,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:40:19,866 INFO L93 Difference]: Finished difference Result 142160 states and 221328 transitions. [2020-10-28 00:40:19,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:40:19,867 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-10-28 00:40:19,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:40:20,019 INFO L225 Difference]: With dead ends: 142160 [2020-10-28 00:40:20,020 INFO L226 Difference]: Without dead ends: 94443 [2020-10-28 00:40:20,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:40:20,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94443 states.