/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.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:11:14,462 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:11:14,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:11:14,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:11:14,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:11:14,534 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:11:14,537 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:11:14,542 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:11:14,546 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:11:14,552 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:11:14,554 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:11:14,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:11:14,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:11:14,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:11:14,562 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:11:14,564 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:11:14,565 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:11:14,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:11:14,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:11:14,585 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:11:14,587 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:11:14,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:11:14,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:11:14,594 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:11:14,603 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:11:14,621 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:11:14,622 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:11:14,624 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:11:14,625 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:11:14,626 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:11:14,626 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:11:14,627 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:11:14,630 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:11:14,630 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:11:14,633 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:11:14,633 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:11:14,634 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:11:14,634 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:11:14,635 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:11:14,636 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:11:14,637 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:11:14,645 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 00:11:14,698 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:11:14,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:11:14,703 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:11:14,704 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:11:14,704 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:11:14,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:11:14,704 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:11:14,705 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:11:14,705 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:11:14,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:11:14,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:11:14,706 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:11:14,707 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:11:14,707 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:11:14,707 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:11:14,707 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:11:14,708 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:11:14,708 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:11:14,708 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:11:14,708 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:11:14,708 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:11:14,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:11:14,709 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:11:14,709 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:11:14,709 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:11:14,710 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:11:14,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:11:14,710 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:11:14,710 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:11:14,710 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:11:15,209 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:11:15,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:11:15,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:11:15,268 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:11:15,269 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:11:15,270 INFO L432 ainManager$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.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-28 00:11:15,347 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/931e8ce89/f70c1292aae6424a8913d3fd09a23b01/FLAGa744111ae [2020-10-28 00:11:16,370 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:11:16,370 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-28 00:11:16,399 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/931e8ce89/f70c1292aae6424a8913d3fd09a23b01/FLAGa744111ae [2020-10-28 00:11:16,438 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/931e8ce89/f70c1292aae6424a8913d3fd09a23b01 [2020-10-28 00:11:16,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:11:16,448 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:11:16,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:11:16,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:11:16,459 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:11:16,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:11:16" (1/1) ... [2020-10-28 00:11:16,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33743a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:16, skipping insertion in model container [2020-10-28 00:11:16,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:11:16" (1/1) ... [2020-10-28 00:11:16,473 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:11:16,567 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:11:17,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:11:17,404 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:11:17,668 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:11:17,693 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:11:17,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:17 WrapperNode [2020-10-28 00:11:17,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:11:17,695 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:11:17,695 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:11:17,696 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:11:17,710 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:17" (1/1) ... [2020-10-28 00:11:17,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:17" (1/1) ... [2020-10-28 00:11:17,775 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:17" (1/1) ... [2020-10-28 00:11:17,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:17" (1/1) ... [2020-10-28 00:11:17,875 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:17" (1/1) ... [2020-10-28 00:11:17,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:17" (1/1) ... [2020-10-28 00:11:17,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:17" (1/1) ... [2020-10-28 00:11:17,979 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:11:17,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:11:17,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:11:17,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:11:17,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:17" (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 00:11:18,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:11:18,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:11:18,069 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:11:18,070 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:11:18,070 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:11:18,070 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:11:18,070 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:11:18,071 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:11:18,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:11:18,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:11:18,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:11:18,072 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:11:18,072 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:11:18,073 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:11:18,073 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:11:18,074 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:11:18,074 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:11:18,074 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:11:18,075 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:11:18,075 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:11:18,075 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:11:18,075 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:11:18,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:11:18,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:11:18,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:11:18,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:11:18,076 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:11:18,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:11:21,014 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:11:21,014 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:11:21,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:11:21 BoogieIcfgContainer [2020-10-28 00:11:21,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:11:21,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:11:21,022 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:11:21,025 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:11:21,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:11:16" (1/3) ... [2020-10-28 00:11:21,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@161d1919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:11:21, skipping insertion in model container [2020-10-28 00:11:21,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:11:17" (2/3) ... [2020-10-28 00:11:21,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@161d1919 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:11:21, skipping insertion in model container [2020-10-28 00:11:21,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:11:21" (3/3) ... [2020-10-28 00:11:21,029 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-28 00:11:21,043 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:11:21,049 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:11:21,064 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:11:21,099 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:11:21,099 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:11:21,099 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:11:21,099 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:11:21,100 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:11:21,100 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:11:21,100 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:11:21,100 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:11:21,164 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states. [2020-10-28 00:11:21,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 00:11:21,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:21,186 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] [2020-10-28 00:11:21,187 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:21,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:21,195 INFO L82 PathProgramCache]: Analyzing trace with hash -2133721457, now seen corresponding path program 1 times [2020-10-28 00:11:21,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:21,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158721415] [2020-10-28 00:11:21,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:21,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:21,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:21,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:22,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:22,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:22,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:23,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:26,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:26,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 00:11:26,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:11:26,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 00:11:26,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:26,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:11:26,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 00:11:26,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 00:11:26,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 00:11:27,895 WARN L193 SmtUtils]: Spent 996.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 00:11:27,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:27,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:27,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:27,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:27,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:27,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:27,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 00:11:27,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:27,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:27,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:27,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:27,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:27,986 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 00:11:27,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158721415] [2020-10-28 00:11:27,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:11:27,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:11:27,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910043803] [2020-10-28 00:11:27,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:11:27,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:28,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:11:28,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:11:28,015 INFO L87 Difference]: Start difference. First operand 714 states. Second operand 4 states. [2020-10-28 00:11:28,985 WARN L193 SmtUtils]: Spent 877.00 ms on a formula simplification that was a NOOP. DAG size: 356 [2020-10-28 00:11:35,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:35,353 INFO L93 Difference]: Finished difference Result 1081 states and 1872 transitions. [2020-10-28 00:11:35,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:11:35,355 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-28 00:11:35,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:35,379 INFO L225 Difference]: With dead ends: 1081 [2020-10-28 00:11:35,380 INFO L226 Difference]: Without dead ends: 851 [2020-10-28 00:11:35,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:11:35,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2020-10-28 00:11:35,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 848. [2020-10-28 00:11:35,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 848 states. [2020-10-28 00:11:35,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1157 transitions. [2020-10-28 00:11:35,526 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1157 transitions. Word has length 68 [2020-10-28 00:11:35,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:35,528 INFO L481 AbstractCegarLoop]: Abstraction has 848 states and 1157 transitions. [2020-10-28 00:11:35,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:11:35,529 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1157 transitions. [2020-10-28 00:11:35,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:11:35,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:35,539 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 00:11:35,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:11:35,541 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:35,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:35,542 INFO L82 PathProgramCache]: Analyzing trace with hash -398382524, now seen corresponding path program 1 times [2020-10-28 00:11:35,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:35,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975915367] [2020-10-28 00:11:35,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:35,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:35,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:35,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:35,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:35,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:36,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:38,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:38,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:39,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:39,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:39,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:40,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:40,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:40,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:40,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:11:40,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:11:40,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-28 00:11:40,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:40,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:11:40,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 00:11:40,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 00:11:40,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 00:11:41,690 WARN L193 SmtUtils]: Spent 932.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 00:11:41,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:41,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:41,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:41,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:41,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:41,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:41,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 00:11:41,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:41,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:41,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:41,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:41,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:41,754 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 00:11:41,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975915367] [2020-10-28 00:11:41,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:11:41,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:11:41,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460909804] [2020-10-28 00:11:41,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:11:41,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:41,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:11:41,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:11:41,758 INFO L87 Difference]: Start difference. First operand 848 states and 1157 transitions. Second operand 4 states. [2020-10-28 00:11:42,808 WARN L193 SmtUtils]: Spent 988.00 ms on a formula simplification that was a NOOP. DAG size: 356 [2020-10-28 00:11:47,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:47,879 INFO L93 Difference]: Finished difference Result 1475 states and 2033 transitions. [2020-10-28 00:11:47,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:11:47,881 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-28 00:11:47,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:47,890 INFO L225 Difference]: With dead ends: 1475 [2020-10-28 00:11:47,890 INFO L226 Difference]: Without dead ends: 1232 [2020-10-28 00:11:47,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:11:47,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2020-10-28 00:11:47,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1228. [2020-10-28 00:11:47,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1228 states. [2020-10-28 00:11:47,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1660 transitions. [2020-10-28 00:11:47,949 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1660 transitions. Word has length 69 [2020-10-28 00:11:47,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:47,950 INFO L481 AbstractCegarLoop]: Abstraction has 1228 states and 1660 transitions. [2020-10-28 00:11:47,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:11:47,950 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1660 transitions. [2020-10-28 00:11:47,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:11:47,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:47,954 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 00:11:47,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:11:47,954 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:47,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:47,955 INFO L82 PathProgramCache]: Analyzing trace with hash 571100596, now seen corresponding path program 1 times [2020-10-28 00:11:47,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:47,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922567562] [2020-10-28 00:11:47,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:11:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:48,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:48,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:48,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:48,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:48,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:50,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:50,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:50,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:50,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:51,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:52,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:52,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:53,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:53,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:11:53,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:11:53,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:11:53,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:53,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:11:53,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 00:11:53,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 00:11:53,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:54,082 WARN L193 SmtUtils]: Spent 999.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 00:11:54,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:11:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:11:54,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:11:54,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:11:54,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:11:54,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:11:54,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 00:11:54,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:11:54,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:11:54,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:11:54,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:11:54,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:11:54,143 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 00:11:54,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922567562] [2020-10-28 00:11:54,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:11:54,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:11:54,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155475296] [2020-10-28 00:11:54,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:11:54,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:11:54,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:11:54,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:11:54,146 INFO L87 Difference]: Start difference. First operand 1228 states and 1660 transitions. Second operand 4 states. [2020-10-28 00:11:55,175 WARN L193 SmtUtils]: Spent 960.00 ms on a formula simplification that was a NOOP. DAG size: 356 [2020-10-28 00:11:59,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:11:59,891 INFO L93 Difference]: Finished difference Result 2236 states and 3126 transitions. [2020-10-28 00:11:59,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:11:59,892 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-28 00:11:59,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:11:59,902 INFO L225 Difference]: With dead ends: 2236 [2020-10-28 00:11:59,902 INFO L226 Difference]: Without dead ends: 1699 [2020-10-28 00:11:59,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:11:59,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2020-10-28 00:11:59,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1695. [2020-10-28 00:11:59,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1695 states. [2020-10-28 00:11:59,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1695 states to 1695 states and 2322 transitions. [2020-10-28 00:11:59,979 INFO L78 Accepts]: Start accepts. Automaton has 1695 states and 2322 transitions. Word has length 69 [2020-10-28 00:11:59,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:11:59,980 INFO L481 AbstractCegarLoop]: Abstraction has 1695 states and 2322 transitions. [2020-10-28 00:11:59,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:11:59,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1695 states and 2322 transitions. [2020-10-28 00:11:59,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 00:11:59,984 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:11:59,985 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 00:11:59,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:11:59,985 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:11:59,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:11:59,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1343442555, now seen corresponding path program 1 times [2020-10-28 00:11:59,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:11:59,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715176050] [2020-10-28 00:11:59,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:00,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:00,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:00,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:00,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:00,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:00,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:02,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:02,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:02,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:03,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:03,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:05,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:05,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 00:12:05,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:12:05,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 00:12:05,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:05,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:12:05,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:12:05,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 00:12:05,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:12:06,239 WARN L193 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 00:12:06,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:06,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:06,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:06,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:06,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:06,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 00:12:06,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:06,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:06,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:06,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:06,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:06,300 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 00:12:06,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715176050] [2020-10-28 00:12:06,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:12:06,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:12:06,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834305505] [2020-10-28 00:12:06,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:12:06,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:06,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:12:06,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:12:06,302 INFO L87 Difference]: Start difference. First operand 1695 states and 2322 transitions. Second operand 6 states. [2020-10-28 00:12:11,333 WARN L193 SmtUtils]: Spent 916.00 ms on a formula simplification that was a NOOP. DAG size: 354 [2020-10-28 00:12:13,342 WARN L193 SmtUtils]: Spent 933.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-28 00:12:13,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:13,498 INFO L93 Difference]: Finished difference Result 4590 states and 6627 transitions. [2020-10-28 00:12:13,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:12:13,499 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-28 00:12:13,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:13,520 INFO L225 Difference]: With dead ends: 4590 [2020-10-28 00:12:13,520 INFO L226 Difference]: Without dead ends: 3904 [2020-10-28 00:12:13,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:12:13,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3904 states. [2020-10-28 00:12:13,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3904 to 1707. [2020-10-28 00:12:13,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1707 states. [2020-10-28 00:12:13,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1707 states to 1707 states and 2330 transitions. [2020-10-28 00:12:13,631 INFO L78 Accepts]: Start accepts. Automaton has 1707 states and 2330 transitions. Word has length 69 [2020-10-28 00:12:13,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:13,631 INFO L481 AbstractCegarLoop]: Abstraction has 1707 states and 2330 transitions. [2020-10-28 00:12:13,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:12:13,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1707 states and 2330 transitions. [2020-10-28 00:12:13,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 00:12:13,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:13,636 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 00:12:13,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:12:13,636 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:13,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:13,637 INFO L82 PathProgramCache]: Analyzing trace with hash 694413436, now seen corresponding path program 1 times [2020-10-28 00:12:13,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:13,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685152825] [2020-10-28 00:12:13,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:13,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:13,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:13,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:13,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:14,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:14,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:15,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:15,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:15,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:15,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:18,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:18,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 00:12:18,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:12:18,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 00:12:18,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:18,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:12:18,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:12:18,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:12:18,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:19,642 WARN L193 SmtUtils]: Spent 841.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 00:12:19,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:19,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:19,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:19,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:19,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:19,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:12:19,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:19,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:19,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:19,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:19,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:19,702 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 00:12:19,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685152825] [2020-10-28 00:12:19,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:12:19,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:12:19,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43489111] [2020-10-28 00:12:19,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:12:19,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:19,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:12:19,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:12:19,705 INFO L87 Difference]: Start difference. First operand 1707 states and 2330 transitions. Second operand 6 states. [2020-10-28 00:12:24,753 WARN L193 SmtUtils]: Spent 956.00 ms on a formula simplification that was a NOOP. DAG size: 354 [2020-10-28 00:12:26,563 WARN L193 SmtUtils]: Spent 955.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-28 00:12:26,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:26,707 INFO L93 Difference]: Finished difference Result 4322 states and 6121 transitions. [2020-10-28 00:12:26,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:12:26,708 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-28 00:12:26,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:26,726 INFO L225 Difference]: With dead ends: 4322 [2020-10-28 00:12:26,727 INFO L226 Difference]: Without dead ends: 3559 [2020-10-28 00:12:26,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:12:26,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3559 states. [2020-10-28 00:12:26,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3559 to 1723. [2020-10-28 00:12:26,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1723 states. [2020-10-28 00:12:26,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 2338 transitions. [2020-10-28 00:12:26,844 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 2338 transitions. Word has length 70 [2020-10-28 00:12:26,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:26,845 INFO L481 AbstractCegarLoop]: Abstraction has 1723 states and 2338 transitions. [2020-10-28 00:12:26,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:12:26,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 2338 transitions. [2020-10-28 00:12:26,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 00:12:26,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:26,849 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] [2020-10-28 00:12:26,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:12:26,849 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:26,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:26,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1951030937, now seen corresponding path program 1 times [2020-10-28 00:12:26,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:26,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616400786] [2020-10-28 00:12:26,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:26,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:26,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:26,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:27,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:27,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:27,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:28,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:29,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:31,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:31,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 00:12:31,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:12:31,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 00:12:31,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:31,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:12:31,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:12:31,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 00:12:31,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:32,884 WARN L193 SmtUtils]: Spent 908.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 00:12:32,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:32,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:32,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:32,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:32,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:32,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:32,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:12:32,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:32,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:32,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:32,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:32,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:32,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:12:32,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616400786] [2020-10-28 00:12:32,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:12:32,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:12:32,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417191201] [2020-10-28 00:12:32,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:12:32,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:32,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:12:32,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:12:32,939 INFO L87 Difference]: Start difference. First operand 1723 states and 2338 transitions. Second operand 7 states. [2020-10-28 00:12:33,953 WARN L193 SmtUtils]: Spent 933.00 ms on a formula simplification that was a NOOP. DAG size: 356 [2020-10-28 00:12:38,226 WARN L193 SmtUtils]: Spent 953.00 ms on a formula simplification that was a NOOP. DAG size: 356 [2020-10-28 00:12:39,340 WARN L193 SmtUtils]: Spent 991.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 00:12:40,451 WARN L193 SmtUtils]: Spent 937.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-28 00:12:41,601 WARN L193 SmtUtils]: Spent 969.00 ms on a formula simplification that was a NOOP. DAG size: 354 [2020-10-28 00:12:43,571 WARN L193 SmtUtils]: Spent 963.00 ms on a formula simplification that was a NOOP. DAG size: 354 [2020-10-28 00:12:44,594 WARN L193 SmtUtils]: Spent 971.00 ms on a formula simplification that was a NOOP. DAG size: 355 [2020-10-28 00:12:45,558 WARN L193 SmtUtils]: Spent 926.00 ms on a formula simplification that was a NOOP. DAG size: 356 [2020-10-28 00:12:46,822 WARN L193 SmtUtils]: Spent 924.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-10-28 00:12:46,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:46,865 INFO L93 Difference]: Finished difference Result 8368 states and 11829 transitions. [2020-10-28 00:12:46,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 00:12:46,867 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 71 [2020-10-28 00:12:46,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:46,899 INFO L225 Difference]: With dead ends: 8368 [2020-10-28 00:12:46,899 INFO L226 Difference]: Without dead ends: 6782 [2020-10-28 00:12:46,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2020-10-28 00:12:46,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6782 states. [2020-10-28 00:12:47,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6782 to 5501. [2020-10-28 00:12:47,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5501 states. [2020-10-28 00:12:47,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5501 states to 5501 states and 7716 transitions. [2020-10-28 00:12:47,295 INFO L78 Accepts]: Start accepts. Automaton has 5501 states and 7716 transitions. Word has length 71 [2020-10-28 00:12:47,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:47,295 INFO L481 AbstractCegarLoop]: Abstraction has 5501 states and 7716 transitions. [2020-10-28 00:12:47,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:12:47,295 INFO L276 IsEmpty]: Start isEmpty. Operand 5501 states and 7716 transitions. [2020-10-28 00:12:47,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 00:12:47,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:47,303 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] [2020-10-28 00:12:47,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:12:47,303 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:47,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:47,304 INFO L82 PathProgramCache]: Analyzing trace with hash -2019395052, now seen corresponding path program 1 times [2020-10-28 00:12:47,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:47,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086721272] [2020-10-28 00:12:47,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:47,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:47,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:47,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:47,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:47,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:47,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:47,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:48,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:48,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:48,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:48,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:48,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:52,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:52,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 00:12:52,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:12:52,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 00:12:52,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:52,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:12:52,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 00:12:52,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 00:12:52,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:53,334 WARN L193 SmtUtils]: Spent 914.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 00:12:53,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:53,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:53,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:53,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:53,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:53,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:53,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 00:12:53,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:53,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:53,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:53,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:53,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:53,397 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 00:12:53,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086721272] [2020-10-28 00:12:53,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:12:53,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:12:53,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155139297] [2020-10-28 00:12:53,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:12:53,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:53,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:12:53,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:12:53,400 INFO L87 Difference]: Start difference. First operand 5501 states and 7716 transitions. Second operand 4 states. [2020-10-28 00:12:54,401 WARN L193 SmtUtils]: Spent 938.00 ms on a formula simplification that was a NOOP. DAG size: 356 [2020-10-28 00:12:58,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:58,944 INFO L93 Difference]: Finished difference Result 13959 states and 19707 transitions. [2020-10-28 00:12:58,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:12:58,945 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-28 00:12:58,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:58,987 INFO L225 Difference]: With dead ends: 13959 [2020-10-28 00:12:58,988 INFO L226 Difference]: Without dead ends: 9368 [2020-10-28 00:12:59,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:12:59,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9368 states. [2020-10-28 00:12:59,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9368 to 9139. [2020-10-28 00:12:59,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9139 states. [2020-10-28 00:12:59,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9139 states to 9139 states and 12727 transitions. [2020-10-28 00:12:59,710 INFO L78 Accepts]: Start accepts. Automaton has 9139 states and 12727 transitions. Word has length 72 [2020-10-28 00:12:59,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:59,711 INFO L481 AbstractCegarLoop]: Abstraction has 9139 states and 12727 transitions. [2020-10-28 00:12:59,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:12:59,711 INFO L276 IsEmpty]: Start isEmpty. Operand 9139 states and 12727 transitions. [2020-10-28 00:12:59,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 00:12:59,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:59,722 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] [2020-10-28 00:12:59,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:12:59,723 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:59,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:59,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1968946418, now seen corresponding path program 1 times [2020-10-28 00:12:59,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:59,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677605007] [2020-10-28 00:12:59,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:59,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:59,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:59,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:00,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:00,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:01,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:01,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:01,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:02,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:02,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:04,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:04,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:04,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:04,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:04,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:04,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:04,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 00:13:04,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 00:13:04,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 00:13:04,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:04,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:13:04,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:13:04,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 00:13:04,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:05,843 WARN L193 SmtUtils]: Spent 992.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 00:13:05,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:13:05,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:05,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:05,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:05,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:13:05,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:13:05,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 00:13:05,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:05,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:13:05,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:13:05,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:13:05,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:05,920 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 00:13:05,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677605007] [2020-10-28 00:13:05,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:13:05,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:13:05,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636608687] [2020-10-28 00:13:05,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:13:05,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:13:05,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:13:05,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:13:05,925 INFO L87 Difference]: Start difference. First operand 9139 states and 12727 transitions. Second operand 6 states. [2020-10-28 00:13:06,938 WARN L193 SmtUtils]: Spent 937.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-28 00:13:11,454 WARN L193 SmtUtils]: Spent 920.00 ms on a formula simplification that was a NOOP. DAG size: 354 [2020-10-28 00:13:12,797 WARN L193 SmtUtils]: Spent 922.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-28 00:13:15,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:13:15,594 INFO L93 Difference]: Finished difference Result 34769 states and 49376 transitions. [2020-10-28 00:13:15,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:13:15,594 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-28 00:13:15,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:13:15,662 INFO L225 Difference]: With dead ends: 34769 [2020-10-28 00:13:15,662 INFO L226 Difference]: Without dead ends: 29664 [2020-10-28 00:13:15,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:13:15,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29664 states. [2020-10-28 00:13:17,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29664 to 16760. [2020-10-28 00:13:17,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16760 states. [2020-10-28 00:13:17,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16760 states to 16760 states and 23517 transitions. [2020-10-28 00:13:17,401 INFO L78 Accepts]: Start accepts. Automaton has 16760 states and 23517 transitions. Word has length 72 [2020-10-28 00:13:17,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:13:17,401 INFO L481 AbstractCegarLoop]: Abstraction has 16760 states and 23517 transitions. [2020-10-28 00:13:17,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:13:17,401 INFO L276 IsEmpty]: Start isEmpty. Operand 16760 states and 23517 transitions. [2020-10-28 00:13:17,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 00:13:17,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:13:17,418 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] [2020-10-28 00:13:17,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:13:17,418 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:13:17,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:13:17,419 INFO L82 PathProgramCache]: Analyzing trace with hash 714935863, now seen corresponding path program 1 times [2020-10-28 00:13:17,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:13:17,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144694509] [2020-10-28 00:13:17,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:13:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:17,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:17,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:17,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:17,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:18,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:18,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:18,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:18,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:19,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:21,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:21,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:21,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:21,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:22,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:22,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 00:13:22,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:13:22,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 00:13:22,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:22,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:13:22,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 00:13:22,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 00:13:22,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:23,417 WARN L193 SmtUtils]: Spent 866.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 00:13:23,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:13:23,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:23,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:23,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:23,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:13:23,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:13:23,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 00:13:23,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:23,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:13:23,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:13:23,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:13:23,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:23,482 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 00:13:23,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144694509] [2020-10-28 00:13:23,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:13:23,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:13:23,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892004610] [2020-10-28 00:13:23,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:13:23,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:13:23,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:13:23,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:13:23,485 INFO L87 Difference]: Start difference. First operand 16760 states and 23517 transitions. Second operand 7 states. [2020-10-28 00:13:24,488 WARN L193 SmtUtils]: Spent 922.00 ms on a formula simplification that was a NOOP. DAG size: 356 [2020-10-28 00:13:29,363 WARN L193 SmtUtils]: Spent 940.00 ms on a formula simplification that was a NOOP. DAG size: 356 [2020-10-28 00:13:30,500 WARN L193 SmtUtils]: Spent 984.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-10-28 00:13:31,797 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 354 [2020-10-28 00:13:32,841 WARN L193 SmtUtils]: Spent 936.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-28 00:13:36,204 WARN L193 SmtUtils]: Spent 892.00 ms on a formula simplification that was a NOOP. DAG size: 354 [2020-10-28 00:13:37,401 WARN L193 SmtUtils]: Spent 896.00 ms on a formula simplification that was a NOOP. DAG size: 355 [2020-10-28 00:13:38,477 WARN L193 SmtUtils]: Spent 898.00 ms on a formula simplification that was a NOOP. DAG size: 356 [2020-10-28 00:13:40,771 WARN L193 SmtUtils]: Spent 935.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-10-28 00:13:41,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:13:41,402 INFO L93 Difference]: Finished difference Result 77830 states and 110595 transitions. [2020-10-28 00:13:41,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 00:13:41,403 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 72 [2020-10-28 00:13:41,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:13:41,567 INFO L225 Difference]: With dead ends: 77830 [2020-10-28 00:13:41,567 INFO L226 Difference]: Without dead ends: 66647 [2020-10-28 00:13:41,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2020-10-28 00:13:41,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66647 states. [2020-10-28 00:13:43,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66647 to 22459. [2020-10-28 00:13:43,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22459 states. [2020-10-28 00:13:43,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22459 states to 22459 states and 31717 transitions. [2020-10-28 00:13:43,597 INFO L78 Accepts]: Start accepts. Automaton has 22459 states and 31717 transitions. Word has length 72 [2020-10-28 00:13:43,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:13:43,597 INFO L481 AbstractCegarLoop]: Abstraction has 22459 states and 31717 transitions. [2020-10-28 00:13:43,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:13:43,597 INFO L276 IsEmpty]: Start isEmpty. Operand 22459 states and 31717 transitions. [2020-10-28 00:13:43,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 00:13:43,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:13:43,611 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] [2020-10-28 00:13:43,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:13:43,611 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:13:43,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:13:43,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1647266493, now seen corresponding path program 1 times [2020-10-28 00:13:43,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:13:43,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016805876] [2020-10-28 00:13:43,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:13:43,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:43,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:43,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:43,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:43,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:44,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:44,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:44,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:44,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:44,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:45,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:45,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:45,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:46,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:47,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:47,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:47,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:47,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:47,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:47,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:47,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:48,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:48,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 00:13:48,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-28 00:13:48,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 00:13:48,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:48,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 00:13:48,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:13:48,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 00:13:48,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:49,856 WARN L193 SmtUtils]: Spent 917.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 00:13:49,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:13:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:49,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:49,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:49,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:13:49,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:13:49,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:13:49,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:49,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:13:49,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:13:49,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:13:49,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:49,903 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 00:13:49,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016805876] [2020-10-28 00:13:49,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:13:49,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 00:13:49,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523870308] [2020-10-28 00:13:49,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 00:13:49,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:13:49,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 00:13:49,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-28 00:13:49,905 INFO L87 Difference]: Start difference. First operand 22459 states and 31717 transitions. Second operand 10 states. [2020-10-28 00:13:50,968 WARN L193 SmtUtils]: Spent 960.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2020-10-28 00:13:55,880 WARN L193 SmtUtils]: Spent 938.00 ms on a formula simplification that was a NOOP. DAG size: 354 [2020-10-28 00:13:59,046 WARN L193 SmtUtils]: Spent 926.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-28 00:14:03,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:14:03,174 INFO L93 Difference]: Finished difference Result 104237 states and 147834 transitions. [2020-10-28 00:14:03,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 00:14:03,175 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 72 [2020-10-28 00:14:03,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:14:03,349 INFO L225 Difference]: With dead ends: 104237 [2020-10-28 00:14:03,349 INFO L226 Difference]: Without dead ends: 85655 [2020-10-28 00:14:03,402 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-28 00:14:03,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85655 states. [2020-10-28 00:14:06,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85655 to 22291. [2020-10-28 00:14:06,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22291 states. [2020-10-28 00:14:06,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22291 states to 22291 states and 31389 transitions. [2020-10-28 00:14:06,282 INFO L78 Accepts]: Start accepts. Automaton has 22291 states and 31389 transitions. Word has length 72 [2020-10-28 00:14:06,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:14:06,282 INFO L481 AbstractCegarLoop]: Abstraction has 22291 states and 31389 transitions. [2020-10-28 00:14:06,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 00:14:06,283 INFO L276 IsEmpty]: Start isEmpty. Operand 22291 states and 31389 transitions. [2020-10-28 00:14:06,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 00:14:06,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:14:06,301 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] [2020-10-28 00:14:06,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:14:06,302 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:14:06,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:14:06,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1866464763, now seen corresponding path program 1 times [2020-10-28 00:14:06,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:14:06,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357996491] [2020-10-28 00:14:06,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:14:06,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:06,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:06,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:06,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:06,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:07,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:07,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:07,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:09,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:09,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:10,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:10,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:10,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:10,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:11,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:11,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:11,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 00:14:11,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 00:14:11,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:14:11,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:11,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:14:11,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 00:14:11,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 00:14:11,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:14:12,326 WARN L193 SmtUtils]: Spent 905.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 00:14:12,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:14:12,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:12,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:12,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:12,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:14:12,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:14:12,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 00:14:12,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:12,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:14:12,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:14:12,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:14:12,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:12,374 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 00:14:12,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357996491] [2020-10-28 00:14:12,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:14:12,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:14:12,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593653940] [2020-10-28 00:14:12,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:14:12,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:14:12,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:14:12,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:14:12,376 INFO L87 Difference]: Start difference. First operand 22291 states and 31389 transitions. Second operand 6 states. [2020-10-28 00:14:13,366 WARN L193 SmtUtils]: Spent 925.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-28 00:14:18,000 WARN L193 SmtUtils]: Spent 938.00 ms on a formula simplification that was a NOOP. DAG size: 354 [2020-10-28 00:14:19,250 WARN L193 SmtUtils]: Spent 985.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-28 00:14:23,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:14:23,604 INFO L93 Difference]: Finished difference Result 50739 states and 72235 transitions. [2020-10-28 00:14:23,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:14:23,605 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-28 00:14:23,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:14:23,665 INFO L225 Difference]: With dead ends: 50739 [2020-10-28 00:14:23,665 INFO L226 Difference]: Without dead ends: 40097 [2020-10-28 00:14:23,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:14:23,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40097 states. [2020-10-28 00:14:25,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40097 to 22168. [2020-10-28 00:14:25,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22168 states. [2020-10-28 00:14:25,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22168 states to 22168 states and 31201 transitions. [2020-10-28 00:14:25,966 INFO L78 Accepts]: Start accepts. Automaton has 22168 states and 31201 transitions. Word has length 73 [2020-10-28 00:14:25,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:14:25,966 INFO L481 AbstractCegarLoop]: Abstraction has 22168 states and 31201 transitions. [2020-10-28 00:14:25,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:14:25,966 INFO L276 IsEmpty]: Start isEmpty. Operand 22168 states and 31201 transitions. [2020-10-28 00:14:25,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 00:14:25,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:14:25,976 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] [2020-10-28 00:14:25,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:14:25,976 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:14:25,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:14:25,977 INFO L82 PathProgramCache]: Analyzing trace with hash 592343448, now seen corresponding path program 1 times [2020-10-28 00:14:25,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:14:25,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886402392] [2020-10-28 00:14:25,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:14:26,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:26,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:26,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:26,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:26,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:26,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:27,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:28,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:28,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:28,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:28,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:29,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:29,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:30,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:30,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:30,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:30,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:31,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:31,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 00:14:31,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 00:14:31,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:14:31,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:31,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:14:31,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 00:14:31,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 00:14:31,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:32,016 WARN L193 SmtUtils]: Spent 930.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 00:14:32,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:14:32,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:32,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:32,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:32,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:14:32,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:14:32,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 00:14:32,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:32,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:14:32,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:14:32,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:14:32,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:32,061 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 00:14:32,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886402392] [2020-10-28 00:14:32,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:14:32,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 00:14:32,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627071175] [2020-10-28 00:14:32,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:14:32,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:14:32,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:14:32,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:14:32,063 INFO L87 Difference]: Start difference. First operand 22168 states and 31201 transitions. Second operand 6 states. [2020-10-28 00:14:33,062 WARN L193 SmtUtils]: Spent 928.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-28 00:14:38,485 WARN L193 SmtUtils]: Spent 957.00 ms on a formula simplification that was a NOOP. DAG size: 354 [2020-10-28 00:14:39,772 WARN L193 SmtUtils]: Spent 948.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-10-28 00:14:46,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:14:46,441 INFO L93 Difference]: Finished difference Result 70743 states and 100500 transitions. [2020-10-28 00:14:46,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:14:46,441 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-28 00:14:46,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:14:46,521 INFO L225 Difference]: With dead ends: 70743 [2020-10-28 00:14:46,521 INFO L226 Difference]: Without dead ends: 60266 [2020-10-28 00:14:46,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:14:46,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60266 states. [2020-10-28 00:14:49,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60266 to 31043. [2020-10-28 00:14:49,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31043 states. [2020-10-28 00:14:49,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31043 states to 31043 states and 43769 transitions. [2020-10-28 00:14:49,938 INFO L78 Accepts]: Start accepts. Automaton has 31043 states and 43769 transitions. Word has length 73 [2020-10-28 00:14:49,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:14:49,938 INFO L481 AbstractCegarLoop]: Abstraction has 31043 states and 43769 transitions. [2020-10-28 00:14:49,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:14:49,938 INFO L276 IsEmpty]: Start isEmpty. Operand 31043 states and 43769 transitions. [2020-10-28 00:14:49,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 00:14:49,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:14:49,948 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] [2020-10-28 00:14:49,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:14:49,948 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:14:49,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:14:49,948 INFO L82 PathProgramCache]: Analyzing trace with hash 317155732, now seen corresponding path program 1 times [2020-10-28 00:14:49,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:14:49,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772627651] [2020-10-28 00:14:49,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:14:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:49,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:50,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:50,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:50,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:50,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:50,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:50,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:51,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:51,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:51,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:52,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking...