/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_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:14:19,458 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:14:19,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:14:19,498 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:14:19,498 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:14:19,500 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:14:19,502 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:14:19,504 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:14:19,507 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:14:19,508 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:14:19,510 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:14:19,511 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:14:19,512 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:14:19,513 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:14:19,515 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:14:19,516 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:14:19,518 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:14:19,519 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:14:19,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:14:19,524 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:14:19,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:14:19,533 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:14:19,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:14:19,536 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:14:19,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:14:19,540 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:14:19,540 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:14:19,542 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:14:19,542 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:14:19,544 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:14:19,544 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:14:19,545 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:14:19,546 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:14:19,547 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:14:19,549 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:14:19,549 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:14:19,550 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:14:19,551 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:14:19,551 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:14:19,553 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:14:19,554 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:14:19,555 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 00:14:19,586 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:14:19,586 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:14:19,588 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:14:19,588 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:14:19,589 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:14:19,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:14:19,589 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:14:19,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:14:19,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:14:19,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:14:19,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:14:19,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:14:19,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:14:19,591 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:14:19,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:14:19,592 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:14:19,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:14:19,593 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:14:19,593 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:14:19,593 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:14:19,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:14:19,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:14:19,594 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:14:19,594 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:14:19,594 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:14:19,595 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:14:19,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:14:19,595 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:14:19,596 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:14:19,596 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:14:20,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:14:20,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:14:20,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:14:20,105 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:14:20,106 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:14:20,107 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-28 00:14:20,205 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7665d094f/adbb668ff7a04e7eb5f8d019da5e16fb/FLAG98daa001f [2020-10-28 00:14:21,162 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:14:21,163 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-28 00:14:21,223 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7665d094f/adbb668ff7a04e7eb5f8d019da5e16fb/FLAG98daa001f [2020-10-28 00:14:21,718 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7665d094f/adbb668ff7a04e7eb5f8d019da5e16fb [2020-10-28 00:14:21,722 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:14:21,730 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:14:21,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:14:21,736 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:14:21,740 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:14:21,741 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:14:21" (1/1) ... [2020-10-28 00:14:21,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cad5941 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:21, skipping insertion in model container [2020-10-28 00:14:21,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:14:21" (1/1) ... [2020-10-28 00:14:21,757 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:14:21,924 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:14:23,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:14:23,236 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:14:23,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:14:23,711 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:14:23,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:23 WrapperNode [2020-10-28 00:14:23,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:14:23,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:14:23,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:14:23,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:14:23,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:23" (1/1) ... [2020-10-28 00:14:23,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:23" (1/1) ... [2020-10-28 00:14:23,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:23" (1/1) ... [2020-10-28 00:14:23,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:23" (1/1) ... [2020-10-28 00:14:23,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:23" (1/1) ... [2020-10-28 00:14:24,006 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:23" (1/1) ... [2020-10-28 00:14:24,035 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:23" (1/1) ... [2020-10-28 00:14:24,072 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:14:24,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:14:24,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:14:24,077 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:14:24,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:23" (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 00:14:24,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:14:24,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:14:24,223 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:14:24,224 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:14:24,224 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:14:24,224 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:14:24,224 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:14:24,225 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:14:24,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:14:24,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:14:24,225 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:14:24,225 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:14:24,225 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:14:24,226 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:14:24,226 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:14:24,226 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:14:24,226 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:14:24,226 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:14:24,226 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:14:24,226 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:14:24,227 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:14:24,227 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:14:24,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:14:24,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:14:24,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:14:24,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:14:24,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:14:24,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:14:27,627 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:14:27,628 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:14:27,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:14:27 BoogieIcfgContainer [2020-10-28 00:14:27,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:14:27,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:14:27,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:14:27,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:14:27,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:14:21" (1/3) ... [2020-10-28 00:14:27,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46c97f8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:14:27, skipping insertion in model container [2020-10-28 00:14:27,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:14:23" (2/3) ... [2020-10-28 00:14:27,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46c97f8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:14:27, skipping insertion in model container [2020-10-28 00:14:27,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:14:27" (3/3) ... [2020-10-28 00:14:27,642 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-28 00:14:27,655 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:14:27,662 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:14:27,676 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:14:27,711 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:14:27,712 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:14:27,712 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:14:27,712 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:14:27,712 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:14:27,712 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:14:27,712 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:14:27,713 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:14:27,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states. [2020-10-28 00:14:27,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:14:27,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:14:27,778 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] [2020-10-28 00:14:27,778 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:14:27,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:14:27,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1940053764, now seen corresponding path program 1 times [2020-10-28 00:14:27,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:14:27,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523649671] [2020-10-28 00:14:27,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:14:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:28,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:28,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:29,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:29,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:29,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:30,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:33,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:33,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:14:33,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:14:33,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-28 00:14:33,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:33,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:14:33,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:14:33,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:14:33,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:14:35,882 WARN L193 SmtUtils]: Spent 2.19 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-28 00:14:35,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:14:35,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:35,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:35,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:35,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:14:35,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:14:35,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-28 00:14:35,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:35,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:14:35,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:14:35,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:14:35,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:36,017 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 00:14:36,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523649671] [2020-10-28 00:14:36,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:14:36,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:14:36,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926381120] [2020-10-28 00:14:36,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:14:36,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:14:36,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:14:36,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:14:36,048 INFO L87 Difference]: Start difference. First operand 1115 states. Second operand 7 states. [2020-10-28 00:14:38,199 WARN L193 SmtUtils]: Spent 1.99 s on a formula simplification that was a NOOP. DAG size: 650 [2020-10-28 00:14:49,566 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification that was a NOOP. DAG size: 652 [2020-10-28 00:14:51,715 WARN L193 SmtUtils]: Spent 1.91 s on a formula simplification that was a NOOP. DAG size: 647 [2020-10-28 00:14:53,705 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification that was a NOOP. DAG size: 648 [2020-10-28 00:14:55,775 WARN L193 SmtUtils]: Spent 1.93 s on a formula simplification that was a NOOP. DAG size: 650 [2020-10-28 00:14:59,341 WARN L193 SmtUtils]: Spent 1.96 s on a formula simplification that was a NOOP. DAG size: 649 [2020-10-28 00:15:01,385 WARN L193 SmtUtils]: Spent 1.98 s on a formula simplification that was a NOOP. DAG size: 648 [2020-10-28 00:15:03,361 WARN L193 SmtUtils]: Spent 1.91 s on a formula simplification that was a NOOP. DAG size: 650 [2020-10-28 00:15:05,723 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification that was a NOOP. DAG size: 651 [2020-10-28 00:15:05,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:15:05,794 INFO L93 Difference]: Finished difference Result 2846 states and 5027 transitions. [2020-10-28 00:15:05,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 00:15:05,802 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-28 00:15:05,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:15:05,852 INFO L225 Difference]: With dead ends: 2846 [2020-10-28 00:15:05,852 INFO L226 Difference]: Without dead ends: 1903 [2020-10-28 00:15:05,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2020-10-28 00:15:05,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1903 states. [2020-10-28 00:15:06,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1903 to 1624. [2020-10-28 00:15:06,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1624 states. [2020-10-28 00:15:06,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2249 transitions. [2020-10-28 00:15:06,063 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2249 transitions. Word has length 69 [2020-10-28 00:15:06,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:15:06,065 INFO L481 AbstractCegarLoop]: Abstraction has 1624 states and 2249 transitions. [2020-10-28 00:15:06,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:15:06,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2249 transitions. [2020-10-28 00:15:06,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:15:06,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:15:06,074 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] [2020-10-28 00:15:06,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:15:06,076 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:15:06,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:15:06,080 INFO L82 PathProgramCache]: Analyzing trace with hash -462731809, now seen corresponding path program 1 times [2020-10-28 00:15:06,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:15:06,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177279537] [2020-10-28 00:15:06,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:15:06,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:06,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:06,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:06,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:06,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:08,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:08,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:09,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:09,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:11,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:11,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:15:11,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:15:11,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-28 00:15:11,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:11,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:15:11,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-28 00:15:11,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 00:15:11,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:13,287 WARN L193 SmtUtils]: Spent 1.94 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-28 00:15:13,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:15:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:13,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:13,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:13,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:15:13,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:15:13,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-28 00:15:13,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:13,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:15:13,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:15:13,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:15:13,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:13,411 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 00:15:13,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177279537] [2020-10-28 00:15:13,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:15:13,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:15:13,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152204096] [2020-10-28 00:15:13,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:15:13,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:15:13,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:15:13,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:15:13,415 INFO L87 Difference]: Start difference. First operand 1624 states and 2249 transitions. Second operand 4 states. [2020-10-28 00:15:15,650 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 650 [2020-10-28 00:15:22,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:15:22,458 INFO L93 Difference]: Finished difference Result 3169 states and 4554 transitions. [2020-10-28 00:15:22,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:15:22,459 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-28 00:15:22,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:15:22,474 INFO L225 Difference]: With dead ends: 3169 [2020-10-28 00:15:22,474 INFO L226 Difference]: Without dead ends: 2365 [2020-10-28 00:15:22,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:15:22,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2020-10-28 00:15:22,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 2342. [2020-10-28 00:15:22,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2342 states. [2020-10-28 00:15:22,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 3297 transitions. [2020-10-28 00:15:22,623 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 3297 transitions. Word has length 69 [2020-10-28 00:15:22,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:15:22,624 INFO L481 AbstractCegarLoop]: Abstraction has 2342 states and 3297 transitions. [2020-10-28 00:15:22,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:15:22,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 3297 transitions. [2020-10-28 00:15:22,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:15:22,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:15:22,629 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] [2020-10-28 00:15:22,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:15:22,629 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:15:22,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:15:22,630 INFO L82 PathProgramCache]: Analyzing trace with hash -636122226, now seen corresponding path program 1 times [2020-10-28 00:15:22,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:15:22,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22997807] [2020-10-28 00:15:22,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:15:22,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:22,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:22,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:22,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:23,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:24,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:24,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:25,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:25,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:27,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:27,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:15:27,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:15:27,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-28 00:15:27,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:27,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:15:27,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 00:15:27,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 00:15:27,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:29,712 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-28 00:15:29,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:15:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:29,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:29,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:29,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:15:29,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:15:29,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-28 00:15:29,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:29,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:15:29,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:15:29,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:15:29,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:29,818 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 00:15:29,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22997807] [2020-10-28 00:15:29,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:15:29,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:15:29,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281939024] [2020-10-28 00:15:29,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:15:29,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:15:29,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:15:29,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:15:29,821 INFO L87 Difference]: Start difference. First operand 2342 states and 3297 transitions. Second operand 4 states. [2020-10-28 00:15:31,939 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 650 [2020-10-28 00:15:38,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:15:38,495 INFO L93 Difference]: Finished difference Result 5178 states and 7486 transitions. [2020-10-28 00:15:38,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:15:38,497 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-28 00:15:38,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:15:38,519 INFO L225 Difference]: With dead ends: 5178 [2020-10-28 00:15:38,519 INFO L226 Difference]: Without dead ends: 3618 [2020-10-28 00:15:38,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:15:38,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3618 states. [2020-10-28 00:15:38,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3618 to 3612. [2020-10-28 00:15:38,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3612 states. [2020-10-28 00:15:38,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3612 states to 3612 states and 5118 transitions. [2020-10-28 00:15:38,698 INFO L78 Accepts]: Start accepts. Automaton has 3612 states and 5118 transitions. Word has length 69 [2020-10-28 00:15:38,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:15:38,698 INFO L481 AbstractCegarLoop]: Abstraction has 3612 states and 5118 transitions. [2020-10-28 00:15:38,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:15:38,699 INFO L276 IsEmpty]: Start isEmpty. Operand 3612 states and 5118 transitions. [2020-10-28 00:15:38,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:15:38,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:15:38,707 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] [2020-10-28 00:15:38,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:15:38,708 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:15:38,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:15:38,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1187052416, now seen corresponding path program 1 times [2020-10-28 00:15:38,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:15:38,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851097281] [2020-10-28 00:15:38,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:15:38,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:38,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:38,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:39,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:39,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:40,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:40,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:41,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:41,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:41,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:43,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:43,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:15:43,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 00:15:43,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 00:15:43,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:43,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:15:43,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:15:43,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 00:15:43,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:46,011 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-28 00:15:46,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:15:46,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:46,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:46,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:46,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:15:46,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:15:46,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 00:15:46,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:46,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:15:46,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:15:46,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:15:46,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:46,101 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 00:15:46,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851097281] [2020-10-28 00:15:46,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:15:46,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:15:46,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210221107] [2020-10-28 00:15:46,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:15:46,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:15:46,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:15:46,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:15:46,104 INFO L87 Difference]: Start difference. First operand 3612 states and 5118 transitions. Second operand 6 states. [2020-10-28 00:15:54,097 WARN L193 SmtUtils]: Spent 1.99 s on a formula simplification that was a NOOP. DAG size: 648 [2020-10-28 00:15:57,406 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification that was a NOOP. DAG size: 647 [2020-10-28 00:15:57,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:15:57,614 INFO L93 Difference]: Finished difference Result 10410 states and 15186 transitions. [2020-10-28 00:15:57,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:15:57,614 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-28 00:15:57,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:15:57,649 INFO L225 Difference]: With dead ends: 10410 [2020-10-28 00:15:57,649 INFO L226 Difference]: Without dead ends: 8295 [2020-10-28 00:15:57,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:15:57,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8295 states. [2020-10-28 00:15:57,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8295 to 3386. [2020-10-28 00:15:57,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3386 states. [2020-10-28 00:15:57,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3386 states to 3386 states and 4789 transitions. [2020-10-28 00:15:57,885 INFO L78 Accepts]: Start accepts. Automaton has 3386 states and 4789 transitions. Word has length 69 [2020-10-28 00:15:57,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:15:57,885 INFO L481 AbstractCegarLoop]: Abstraction has 3386 states and 4789 transitions. [2020-10-28 00:15:57,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:15:57,886 INFO L276 IsEmpty]: Start isEmpty. Operand 3386 states and 4789 transitions. [2020-10-28 00:15:57,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:15:57,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:15:57,890 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] [2020-10-28 00:15:57,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:15:57,891 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:15:57,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:15:57,891 INFO L82 PathProgramCache]: Analyzing trace with hash -832783090, now seen corresponding path program 1 times [2020-10-28 00:15:57,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:15:57,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119545722] [2020-10-28 00:15:57,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:15:57,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:57,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:58,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:58,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:58,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:59,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:59,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:59,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:00,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:02,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:02,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:16:02,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:16:02,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 00:16:02,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:02,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:16:02,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:16:02,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 00:16:02,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:05,137 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-28 00:16:05,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:16:05,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:05,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:05,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:05,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:16:05,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:16:05,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 00:16:05,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:05,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:16:05,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:16:05,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:16:05,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:05,226 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 00:16:05,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119545722] [2020-10-28 00:16:05,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:16:05,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:16:05,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446196468] [2020-10-28 00:16:05,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:16:05,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:16:05,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:16:05,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:16:05,233 INFO L87 Difference]: Start difference. First operand 3386 states and 4789 transitions. Second operand 7 states. [2020-10-28 00:16:07,333 WARN L193 SmtUtils]: Spent 1.98 s on a formula simplification that was a NOOP. DAG size: 650 [2020-10-28 00:16:14,101 WARN L193 SmtUtils]: Spent 1.99 s on a formula simplification that was a NOOP. DAG size: 652 [2020-10-28 00:16:16,211 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification that was a NOOP. DAG size: 650 [2020-10-28 00:16:18,244 WARN L193 SmtUtils]: Spent 1.91 s on a formula simplification that was a NOOP. DAG size: 647 [2020-10-28 00:16:20,246 WARN L193 SmtUtils]: Spent 1.93 s on a formula simplification that was a NOOP. DAG size: 648 [2020-10-28 00:16:23,888 WARN L193 SmtUtils]: Spent 1.89 s on a formula simplification that was a NOOP. DAG size: 649 [2020-10-28 00:16:25,911 WARN L193 SmtUtils]: Spent 1.96 s on a formula simplification that was a NOOP. DAG size: 648 [2020-10-28 00:16:27,966 WARN L193 SmtUtils]: Spent 1.96 s on a formula simplification that was a NOOP. DAG size: 650 [2020-10-28 00:16:30,362 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification that was a NOOP. DAG size: 651 [2020-10-28 00:16:30,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:16:30,429 INFO L93 Difference]: Finished difference Result 13661 states and 19996 transitions. [2020-10-28 00:16:30,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 00:16:30,430 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-28 00:16:30,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:16:30,473 INFO L225 Difference]: With dead ends: 13661 [2020-10-28 00:16:30,474 INFO L226 Difference]: Without dead ends: 10961 [2020-10-28 00:16:30,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2020-10-28 00:16:30,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10961 states. [2020-10-28 00:16:30,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10961 to 8839. [2020-10-28 00:16:30,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8839 states. [2020-10-28 00:16:31,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8839 states to 8839 states and 12869 transitions. [2020-10-28 00:16:31,011 INFO L78 Accepts]: Start accepts. Automaton has 8839 states and 12869 transitions. Word has length 69 [2020-10-28 00:16:31,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:16:31,011 INFO L481 AbstractCegarLoop]: Abstraction has 8839 states and 12869 transitions. [2020-10-28 00:16:31,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:16:31,011 INFO L276 IsEmpty]: Start isEmpty. Operand 8839 states and 12869 transitions. [2020-10-28 00:16:31,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 00:16:31,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:16:31,018 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] [2020-10-28 00:16:31,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:16:31,019 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:16:31,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:16:31,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1856263526, now seen corresponding path program 1 times [2020-10-28 00:16:31,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:16:31,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17082498] [2020-10-28 00:16:31,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:16:31,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:31,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:31,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:31,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:31,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:32,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:32,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:32,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:34,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:34,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:34,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:36,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:36,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 00:16:36,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:16:36,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 00:16:36,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:36,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:16:36,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:16:36,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 00:16:36,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:38,145 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-28 00:16:38,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:16:38,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:38,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:38,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:38,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:16:38,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:16:38,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 00:16:38,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:38,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:16:38,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:16:38,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:16:38,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:38,222 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 00:16:38,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17082498] [2020-10-28 00:16:38,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:16:38,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:16:38,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389757158] [2020-10-28 00:16:38,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:16:38,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:16:38,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:16:38,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:16:38,225 INFO L87 Difference]: Start difference. First operand 8839 states and 12869 transitions. Second operand 6 states. [2020-10-28 00:16:45,065 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 648 [2020-10-28 00:16:49,246 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 647 [2020-10-28 00:16:50,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:16:50,065 INFO L93 Difference]: Finished difference Result 33088 states and 48647 transitions. [2020-10-28 00:16:50,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:16:50,070 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-28 00:16:50,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:16:50,145 INFO L225 Difference]: With dead ends: 33088 [2020-10-28 00:16:50,146 INFO L226 Difference]: Without dead ends: 27299 [2020-10-28 00:16:50,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:16:50,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27299 states. [2020-10-28 00:16:50,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27299 to 8765. [2020-10-28 00:16:50,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8765 states. [2020-10-28 00:16:50,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8765 states to 8765 states and 12740 transitions. [2020-10-28 00:16:50,914 INFO L78 Accepts]: Start accepts. Automaton has 8765 states and 12740 transitions. Word has length 70 [2020-10-28 00:16:50,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:16:50,915 INFO L481 AbstractCegarLoop]: Abstraction has 8765 states and 12740 transitions. [2020-10-28 00:16:50,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:16:50,915 INFO L276 IsEmpty]: Start isEmpty. Operand 8765 states and 12740 transitions. [2020-10-28 00:16:50,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 00:16:50,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:16:50,922 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] [2020-10-28 00:16:50,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:16:50,923 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:16:50,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:16:50,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1714383163, now seen corresponding path program 1 times [2020-10-28 00:16:50,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:16:50,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659442528] [2020-10-28 00:16:50,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:16:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:51,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:51,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:51,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:51,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:51,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:52,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:53,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:53,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:53,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:54,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:55,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:55,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 00:16:55,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:16:55,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 00:16:55,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:55,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:16:55,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 00:16:55,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 00:16:55,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:58,083 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-28 00:16:58,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:16:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:16:58,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:16:58,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:16:58,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:16:58,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:16:58,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 00:16:58,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:16:58,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:16:58,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:16:58,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:16:58,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:16:58,166 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 00:16:58,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659442528] [2020-10-28 00:16:58,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:16:58,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:16:58,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498047344] [2020-10-28 00:16:58,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:16:58,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:16:58,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:16:58,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:16:58,169 INFO L87 Difference]: Start difference. First operand 8765 states and 12740 transitions. Second operand 6 states. [2020-10-28 00:17:00,269 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification that was a NOOP. DAG size: 647 [2020-10-28 00:17:07,705 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 648 [2020-10-28 00:17:09,994 WARN L193 SmtUtils]: Spent 1.98 s on a formula simplification that was a NOOP. DAG size: 647 [2020-10-28 00:17:15,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:17:15,363 INFO L93 Difference]: Finished difference Result 65278 states and 96072 transitions. [2020-10-28 00:17:15,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:17:15,363 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-28 00:17:15,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:17:15,476 INFO L225 Difference]: With dead ends: 65278 [2020-10-28 00:17:15,477 INFO L226 Difference]: Without dead ends: 56678 [2020-10-28 00:17:15,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:17:15,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56678 states. [2020-10-28 00:17:17,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56678 to 29820. [2020-10-28 00:17:17,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29820 states. [2020-10-28 00:17:17,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29820 states to 29820 states and 43424 transitions. [2020-10-28 00:17:17,888 INFO L78 Accepts]: Start accepts. Automaton has 29820 states and 43424 transitions. Word has length 70 [2020-10-28 00:17:17,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:17:17,888 INFO L481 AbstractCegarLoop]: Abstraction has 29820 states and 43424 transitions. [2020-10-28 00:17:17,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:17:17,889 INFO L276 IsEmpty]: Start isEmpty. Operand 29820 states and 43424 transitions. [2020-10-28 00:17:17,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 00:17:17,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:17:17,902 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] [2020-10-28 00:17:17,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:17:17,903 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:17:17,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:17:17,903 INFO L82 PathProgramCache]: Analyzing trace with hash -2115230271, now seen corresponding path program 1 times [2020-10-28 00:17:17,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:17:17,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850682940] [2020-10-28 00:17:17,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:17:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:17:18,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:18,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:18,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:18,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:19,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:19,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:19,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:21,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:21,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:21,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:21,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:22,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:22,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:17:22,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 00:17:22,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:17:22,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 00:17:22,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:17:22,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 00:17:22,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:17:22,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 00:17:22,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:17:25,185 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-28 00:17:25,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:17:25,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:17:25,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:25,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:17:25,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:17:25,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:17:25,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 00:17:25,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:17:25,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:17:25,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:17:25,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:17:25,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:17:25,269 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 00:17:25,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850682940] [2020-10-28 00:17:25,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:17:25,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-28 00:17:25,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974116313] [2020-10-28 00:17:25,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 00:17:25,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:17:25,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 00:17:25,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-28 00:17:25,272 INFO L87 Difference]: Start difference. First operand 29820 states and 43424 transitions. Second operand 9 states. [2020-10-28 00:17:27,402 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 650 [2020-10-28 00:17:34,508 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 648 [2020-10-28 00:17:40,176 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification that was a NOOP. DAG size: 647 [2020-10-28 00:17:46,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:17:46,711 INFO L93 Difference]: Finished difference Result 180549 states and 263446 transitions. [2020-10-28 00:17:46,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 00:17:46,711 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 70 [2020-10-28 00:17:46,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:17:47,129 INFO L225 Difference]: With dead ends: 180549 [2020-10-28 00:17:47,129 INFO L226 Difference]: Without dead ends: 153439 [2020-10-28 00:17:47,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-10-28 00:17:47,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153439 states. [2020-10-28 00:17:50,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153439 to 29690. [2020-10-28 00:17:50,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29690 states. [2020-10-28 00:17:50,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29690 states to 29690 states and 42837 transitions. [2020-10-28 00:17:50,243 INFO L78 Accepts]: Start accepts. Automaton has 29690 states and 42837 transitions. Word has length 70 [2020-10-28 00:17:50,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:17:50,244 INFO L481 AbstractCegarLoop]: Abstraction has 29690 states and 42837 transitions. [2020-10-28 00:17:50,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 00:17:50,244 INFO L276 IsEmpty]: Start isEmpty. Operand 29690 states and 42837 transitions. [2020-10-28 00:17:50,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 00:17:50,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:17:50,257 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] [2020-10-28 00:17:50,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:17:50,257 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:17:50,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:17:50,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1761004317, now seen corresponding path program 1 times [2020-10-28 00:17:50,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:17:50,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1989737660] [2020-10-28 00:17:50,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:17:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:17:50,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:50,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:50,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:17:50,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking...