/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:19:11,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:19:11,611 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:19:11,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:19:11,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:19:11,679 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:19:11,681 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:19:11,686 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:19:11,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:19:11,696 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:19:11,698 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:19:11,700 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:19:11,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:19:11,705 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:19:11,707 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:19:11,709 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:19:11,710 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:19:11,713 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:19:11,720 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:19:11,728 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:19:11,730 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:19:11,732 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:19:11,734 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:19:11,736 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:19:11,756 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:19:11,757 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:19:11,757 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:19:11,759 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:19:11,760 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:19:11,761 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:19:11,762 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:19:11,763 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:19:11,765 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:19:11,765 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:19:11,767 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:19:11,767 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:19:11,768 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:19:11,768 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:19:11,768 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:19:11,769 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:19:11,770 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:19:11,778 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 18:19:11,826 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:19:11,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:19:11,831 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:19:11,831 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:19:11,831 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:19:11,831 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:19:11,832 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:19:11,832 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:19:11,832 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:19:11,832 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:19:11,833 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:19:11,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:19:11,834 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:19:11,834 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:19:11,834 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:19:11,834 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:19:11,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:19:11,835 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:19:11,835 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:19:11,835 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:19:11,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:19:11,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:19:11,836 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:19:11,836 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:19:11,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:19:11,836 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:19:11,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:19:11,836 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:19:11,837 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:19:11,837 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:19:12,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:19:12,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:19:12,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:19:12,299 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:19:12,299 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:19:12,302 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-28 18:19:12,399 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc2db7603/02765f8bc4674f588a30dedb3c4ee016/FLAG8d0f5bba1 [2020-10-28 18:19:13,434 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:19:13,436 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-28 18:19:13,467 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc2db7603/02765f8bc4674f588a30dedb3c4ee016/FLAG8d0f5bba1 [2020-10-28 18:19:13,955 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc2db7603/02765f8bc4674f588a30dedb3c4ee016 [2020-10-28 18:19:13,958 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:19:13,967 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:19:13,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:19:13,974 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:19:13,978 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:19:13,979 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:19:13" (1/1) ... [2020-10-28 18:19:13,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d97885b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:19:13, skipping insertion in model container [2020-10-28 18:19:13,984 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:19:13" (1/1) ... [2020-10-28 18:19:13,993 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:19:14,151 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:19:15,344 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:19:15,364 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:19:16,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:19:16,225 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:19:16,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:19:16 WrapperNode [2020-10-28 18:19:16,226 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:19:16,228 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:19:16,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:19:16,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:19:16,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:19:16" (1/1) ... [2020-10-28 18:19:16,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:19:16" (1/1) ... [2020-10-28 18:19:16,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:19:16" (1/1) ... [2020-10-28 18:19:16,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:19:16" (1/1) ... [2020-10-28 18:19:16,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:19:16" (1/1) ... [2020-10-28 18:19:16,417 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:19:16" (1/1) ... [2020-10-28 18:19:16,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:19:16" (1/1) ... [2020-10-28 18:19:16,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:19:16,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:19:16,475 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:19:16,475 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:19:16,476 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:19:16" (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 18:19:16,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:19:16,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:19:16,555 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:19:16,556 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:19:16,556 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:19:16,556 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:19:16,556 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:19:16,557 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:19:16,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:19:16,557 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:19:16,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:19:16,558 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:19:16,559 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:19:16,559 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:19:16,559 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:19:16,560 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:19:16,560 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:19:16,560 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:19:16,561 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:19:16,561 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:19:16,561 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:19:16,561 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:19:16,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:19:16,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:19:16,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:19:16,562 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:19:16,562 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:19:16,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:19:21,334 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:19:21,335 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:19:21,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:19:21 BoogieIcfgContainer [2020-10-28 18:19:21,339 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:19:21,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:19:21,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:19:21,345 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:19:21,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:19:13" (1/3) ... [2020-10-28 18:19:21,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b0a51de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:19:21, skipping insertion in model container [2020-10-28 18:19:21,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:19:16" (2/3) ... [2020-10-28 18:19:21,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b0a51de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:19:21, skipping insertion in model container [2020-10-28 18:19:21,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:19:21" (3/3) ... [2020-10-28 18:19:21,348 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-28 18:19:21,361 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:19:21,367 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:19:21,381 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:19:21,416 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:19:21,416 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:19:21,416 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:19:21,417 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:19:21,417 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:19:21,417 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:19:21,417 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:19:21,417 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:19:21,459 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states. [2020-10-28 18:19:21,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-28 18:19:21,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:19:21,503 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:19:21,503 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:19:21,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:19:21,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1702593958, now seen corresponding path program 1 times [2020-10-28 18:19:21,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:19:21,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455519365] [2020-10-28 18:19:21,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:19:22,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:22,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:23,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:23,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:24,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:24,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:24,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:24,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:25,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:25,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:25,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:26,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:26,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:26,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:27,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:27,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 307 [2020-10-28 18:19:27,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:19:27,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-28 18:19:27,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:27,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:27,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:19:27,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-28 18:19:27,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-10-28 18:19:27,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 18:19:29,066 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:19:29,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:19:29,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:29,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:29,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:29,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:19:29,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:19:29,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-28 18:19:29,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:29,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:29,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:19:29,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:19:29,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:19:29,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:19:29,334 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 18:19:29,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455519365] [2020-10-28 18:19:29,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:19:29,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:19:29,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436816465] [2020-10-28 18:19:29,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:19:29,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:19:29,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:19:29,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:19:29,362 INFO L87 Difference]: Start difference. First operand 898 states. Second operand 4 states. [2020-10-28 18:19:31,070 WARN L193 SmtUtils]: Spent 1.60 s on a formula simplification that was a NOOP. DAG size: 347 [2020-10-28 18:19:40,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:19:40,793 INFO L93 Difference]: Finished difference Result 1547 states and 2790 transitions. [2020-10-28 18:19:40,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:19:40,795 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 299 [2020-10-28 18:19:40,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:19:40,836 INFO L225 Difference]: With dead ends: 1547 [2020-10-28 18:19:40,836 INFO L226 Difference]: Without dead ends: 1297 [2020-10-28 18:19:40,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:19:40,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2020-10-28 18:19:41,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 1294. [2020-10-28 18:19:41,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1294 states. [2020-10-28 18:19:41,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 2002 transitions. [2020-10-28 18:19:41,018 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 2002 transitions. Word has length 299 [2020-10-28 18:19:41,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:19:41,025 INFO L481 AbstractCegarLoop]: Abstraction has 1294 states and 2002 transitions. [2020-10-28 18:19:41,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:19:41,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 2002 transitions. [2020-10-28 18:19:41,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-28 18:19:41,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:19:41,040 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:19:41,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:19:41,042 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:19:41,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:19:41,043 INFO L82 PathProgramCache]: Analyzing trace with hash 590406428, now seen corresponding path program 1 times [2020-10-28 18:19:41,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:19:41,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654284061] [2020-10-28 18:19:41,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:19:41,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:41,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:41,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:41,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:42,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:42,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:42,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:42,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:43,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:43,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:43,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:43,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:43,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:44,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:46,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:46,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 307 [2020-10-28 18:19:46,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:19:46,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 18:19:46,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:46,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:46,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:19:46,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-28 18:19:46,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 212 [2020-10-28 18:19:46,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:19:48,100 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:19:48,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:19:48,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:48,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:48,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:19:48,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:19:48,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:19:48,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 18:19:48,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:19:48,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:19:48,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:19:48,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:19:48,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:19:48,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:19:48,354 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 18:19:48,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654284061] [2020-10-28 18:19:48,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:19:48,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:19:48,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243078817] [2020-10-28 18:19:48,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:19:48,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:19:48,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:19:48,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:19:48,361 INFO L87 Difference]: Start difference. First operand 1294 states and 2002 transitions. Second operand 4 states. [2020-10-28 18:19:50,070 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification that was a NOOP. DAG size: 347 [2020-10-28 18:19:58,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:19:58,239 INFO L93 Difference]: Finished difference Result 2495 states and 3903 transitions. [2020-10-28 18:19:58,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:19:58,240 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 299 [2020-10-28 18:19:58,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:19:58,255 INFO L225 Difference]: With dead ends: 2495 [2020-10-28 18:19:58,255 INFO L226 Difference]: Without dead ends: 2181 [2020-10-28 18:19:58,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:19:58,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2020-10-28 18:19:58,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2178. [2020-10-28 18:19:58,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2178 states. [2020-10-28 18:19:58,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 3387 transitions. [2020-10-28 18:19:58,368 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 3387 transitions. Word has length 299 [2020-10-28 18:19:58,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:19:58,369 INFO L481 AbstractCegarLoop]: Abstraction has 2178 states and 3387 transitions. [2020-10-28 18:19:58,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:19:58,369 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 3387 transitions. [2020-10-28 18:19:58,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-28 18:19:58,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:19:58,379 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:19:58,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:19:58,379 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:19:58,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:19:58,385 INFO L82 PathProgramCache]: Analyzing trace with hash 579909363, now seen corresponding path program 1 times [2020-10-28 18:19:58,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:19:58,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976665476] [2020-10-28 18:19:58,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:19:58,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:19:58,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:59,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:59,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:19:59,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:00,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:00,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:00,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:00,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:00,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:00,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:00,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:01,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:01,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:03,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:20:03,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 307 [2020-10-28 18:20:03,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 18:20:03,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-28 18:20:03,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:20:03,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:20:03,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:20:03,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:20:03,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-10-28 18:20:03,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:20:05,291 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:20:05,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:20:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:20:05,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:05,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:20:05,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:20:05,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:20:05,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 18:20:05,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:20:05,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:20:05,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:20:05,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:20:05,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:20:05,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:20:05,578 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 18:20:05,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976665476] [2020-10-28 18:20:05,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:20:05,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:20:05,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168522068] [2020-10-28 18:20:05,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:20:05,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:20:05,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:20:05,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:20:05,588 INFO L87 Difference]: Start difference. First operand 2178 states and 3387 transitions. Second operand 5 states. [2020-10-28 18:20:16,872 WARN L193 SmtUtils]: Spent 1.73 s on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:20:19,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:20:19,803 INFO L93 Difference]: Finished difference Result 6453 states and 10030 transitions. [2020-10-28 18:20:19,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:20:19,806 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 299 [2020-10-28 18:20:19,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:20:19,829 INFO L225 Difference]: With dead ends: 6453 [2020-10-28 18:20:19,829 INFO L226 Difference]: Without dead ends: 4290 [2020-10-28 18:20:19,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:20:19,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4290 states. [2020-10-28 18:20:20,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4290 to 4132. [2020-10-28 18:20:20,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4132 states. [2020-10-28 18:20:20,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4132 states to 4132 states and 6399 transitions. [2020-10-28 18:20:20,042 INFO L78 Accepts]: Start accepts. Automaton has 4132 states and 6399 transitions. Word has length 299 [2020-10-28 18:20:20,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:20:20,043 INFO L481 AbstractCegarLoop]: Abstraction has 4132 states and 6399 transitions. [2020-10-28 18:20:20,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:20:20,043 INFO L276 IsEmpty]: Start isEmpty. Operand 4132 states and 6399 transitions. [2020-10-28 18:20:20,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-28 18:20:20,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:20:20,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:20:20,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:20:20,056 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:20:20,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:20:20,056 INFO L82 PathProgramCache]: Analyzing trace with hash -99204952, now seen corresponding path program 1 times [2020-10-28 18:20:20,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:20:20,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024185010] [2020-10-28 18:20:20,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:20:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:20:20,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:20,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:20,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:20,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:20,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:21,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:21,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:21,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:21,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:21,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:21,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:21,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:24,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:24,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:24,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:25,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:20:25,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 309 [2020-10-28 18:20:25,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:20:25,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-28 18:20:25,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:20:25,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:20:25,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:20:25,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:20:25,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-28 18:20:25,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:20:26,990 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:20:26,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:20:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:20:27,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:27,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:20:27,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:20:27,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:20:27,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 18:20:27,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:20:27,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:20:27,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:20:27,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:20:27,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:20:27,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:20:27,215 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 18:20:27,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024185010] [2020-10-28 18:20:27,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:20:27,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:20:27,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138380898] [2020-10-28 18:20:27,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:20:27,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:20:27,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:20:27,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:20:27,218 INFO L87 Difference]: Start difference. First operand 4132 states and 6399 transitions. Second operand 5 states. [2020-10-28 18:20:39,657 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:20:43,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:20:43,092 INFO L93 Difference]: Finished difference Result 12191 states and 18849 transitions. [2020-10-28 18:20:43,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:20:43,093 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 301 [2020-10-28 18:20:43,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:20:43,134 INFO L225 Difference]: With dead ends: 12191 [2020-10-28 18:20:43,135 INFO L226 Difference]: Without dead ends: 8124 [2020-10-28 18:20:43,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:20:43,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8124 states. [2020-10-28 18:20:43,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8124 to 8034. [2020-10-28 18:20:43,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8034 states. [2020-10-28 18:20:43,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8034 states to 8034 states and 12367 transitions. [2020-10-28 18:20:43,659 INFO L78 Accepts]: Start accepts. Automaton has 8034 states and 12367 transitions. Word has length 301 [2020-10-28 18:20:43,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:20:43,660 INFO L481 AbstractCegarLoop]: Abstraction has 8034 states and 12367 transitions. [2020-10-28 18:20:43,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:20:43,660 INFO L276 IsEmpty]: Start isEmpty. Operand 8034 states and 12367 transitions. [2020-10-28 18:20:43,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-10-28 18:20:43,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:20:43,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:20:43,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:20:43,680 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:20:43,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:20:43,681 INFO L82 PathProgramCache]: Analyzing trace with hash -228691778, now seen corresponding path program 1 times [2020-10-28 18:20:43,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:20:43,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961357558] [2020-10-28 18:20:43,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:20:43,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:20:43,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:43,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:43,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:43,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:44,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:44,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:44,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:44,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:44,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:44,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:45,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:45,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:45,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:45,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:48,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:20:48,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 311 [2020-10-28 18:20:48,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 18:20:48,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5063 [2020-10-28 18:20:48,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:20:48,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:20:48,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:20:48,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 18:20:48,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 180 [2020-10-28 18:20:48,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:20:50,500 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:20:50,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:20:50,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:20:50,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:20:50,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:20:50,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:20:50,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:20:50,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 18:20:50,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:20:50,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:20:50,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:20:50,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:20:50,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:20:50,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:20:50,669 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 18:20:50,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961357558] [2020-10-28 18:20:50,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:20:50,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:20:50,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18080836] [2020-10-28 18:20:50,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:20:50,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:20:50,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:20:50,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:20:50,671 INFO L87 Difference]: Start difference. First operand 8034 states and 12367 transitions. Second operand 4 states. [2020-10-28 18:21:02,985 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification that was a NOOP. DAG size: 351 [2020-10-28 18:21:06,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:21:06,030 INFO L93 Difference]: Finished difference Result 23564 states and 36194 transitions. [2020-10-28 18:21:06,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:21:06,032 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 303 [2020-10-28 18:21:06,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:21:06,098 INFO L225 Difference]: With dead ends: 23564 [2020-10-28 18:21:06,098 INFO L226 Difference]: Without dead ends: 15772 [2020-10-28 18:21:06,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:21:06,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15772 states. [2020-10-28 18:21:07,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15772 to 15554. [2020-10-28 18:21:07,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15554 states. [2020-10-28 18:21:07,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15554 states to 15554 states and 23802 transitions. [2020-10-28 18:21:07,076 INFO L78 Accepts]: Start accepts. Automaton has 15554 states and 23802 transitions. Word has length 303 [2020-10-28 18:21:07,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:21:07,076 INFO L481 AbstractCegarLoop]: Abstraction has 15554 states and 23802 transitions. [2020-10-28 18:21:07,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:21:07,077 INFO L276 IsEmpty]: Start isEmpty. Operand 15554 states and 23802 transitions. [2020-10-28 18:21:07,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-10-28 18:21:07,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:21:07,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:21:07,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:21:07,110 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:21:07,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:21:07,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1412134617, now seen corresponding path program 1 times [2020-10-28 18:21:07,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:21:07,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559550091] [2020-10-28 18:21:07,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:21:07,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:21:07,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:07,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:07,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:07,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:08,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:08,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:08,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:08,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:08,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:08,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:08,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:09,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:09,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:09,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:09,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:12,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:21:12,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 311 [2020-10-28 18:21:12,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:21:12,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-28 18:21:12,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:21:12,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:21:12,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:21:12,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:21:12,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 176 [2020-10-28 18:21:12,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:21:14,062 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:21:14,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:21:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:21:14,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:14,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:21:14,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:21:14,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:21:14,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:21:14,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:21:14,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:21:14,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:21:14,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:21:14,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:21:14,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:21:14,256 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 18:21:14,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559550091] [2020-10-28 18:21:14,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:21:14,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:21:14,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738782525] [2020-10-28 18:21:14,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:21:14,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:21:14,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:21:14,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:21:14,259 INFO L87 Difference]: Start difference. First operand 15554 states and 23802 transitions. Second operand 5 states. [2020-10-28 18:21:26,516 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:21:30,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:21:30,086 INFO L93 Difference]: Finished difference Result 45830 states and 70024 transitions. [2020-10-28 18:21:30,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:21:30,094 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 303 [2020-10-28 18:21:30,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:21:30,168 INFO L225 Difference]: With dead ends: 45830 [2020-10-28 18:21:30,168 INFO L226 Difference]: Without dead ends: 30436 [2020-10-28 18:21:30,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:21:30,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30436 states. [2020-10-28 18:21:31,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30436 to 30218. [2020-10-28 18:21:31,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30218 states. [2020-10-28 18:21:31,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30218 states to 30218 states and 45926 transitions. [2020-10-28 18:21:31,681 INFO L78 Accepts]: Start accepts. Automaton has 30218 states and 45926 transitions. Word has length 303 [2020-10-28 18:21:31,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:21:31,681 INFO L481 AbstractCegarLoop]: Abstraction has 30218 states and 45926 transitions. [2020-10-28 18:21:31,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:21:31,681 INFO L276 IsEmpty]: Start isEmpty. Operand 30218 states and 45926 transitions. [2020-10-28 18:21:31,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-28 18:21:31,742 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:21:31,743 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:21:31,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:21:31,743 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:21:31,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:21:31,744 INFO L82 PathProgramCache]: Analyzing trace with hash 664307511, now seen corresponding path program 1 times [2020-10-28 18:21:31,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:21:31,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203443245] [2020-10-28 18:21:31,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:21:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:21:31,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:31,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:32,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:32,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:32,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:33,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:33,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:33,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:33,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:33,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:33,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:33,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:33,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:33,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:34,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:36,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:36,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:21:36,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-28 18:21:36,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 18:21:36,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 18:21:36,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:21:36,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:21:36,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:21:36,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:21:36,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 179 [2020-10-28 18:21:36,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:21:38,611 WARN L193 SmtUtils]: Spent 1.65 s on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:21:38,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:21:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:21:38,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:38,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:21:38,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:21:38,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:21:38,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-28 18:21:38,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:21:38,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:21:38,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:21:38,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:21:38,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:21:38,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:21:38,797 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 18:21:38,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203443245] [2020-10-28 18:21:38,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:21:38,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:21:38,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281831743] [2020-10-28 18:21:38,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:21:38,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:21:38,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:21:38,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:21:38,800 INFO L87 Difference]: Start difference. First operand 30218 states and 45926 transitions. Second operand 5 states. [2020-10-28 18:21:51,483 WARN L193 SmtUtils]: Spent 1.60 s on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:21:55,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:21:55,325 INFO L93 Difference]: Finished difference Result 89156 states and 135278 transitions. [2020-10-28 18:21:55,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:21:55,326 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 305 [2020-10-28 18:21:55,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:21:55,473 INFO L225 Difference]: With dead ends: 89156 [2020-10-28 18:21:55,473 INFO L226 Difference]: Without dead ends: 59086 [2020-10-28 18:21:55,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:21:55,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59086 states. [2020-10-28 18:21:58,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59086 to 58908. [2020-10-28 18:21:58,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58908 states. [2020-10-28 18:21:58,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58908 states to 58908 states and 88708 transitions. [2020-10-28 18:21:58,672 INFO L78 Accepts]: Start accepts. Automaton has 58908 states and 88708 transitions. Word has length 305 [2020-10-28 18:21:58,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:21:58,673 INFO L481 AbstractCegarLoop]: Abstraction has 58908 states and 88708 transitions. [2020-10-28 18:21:58,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:21:58,673 INFO L276 IsEmpty]: Start isEmpty. Operand 58908 states and 88708 transitions. [2020-10-28 18:21:58,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-28 18:21:58,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:21:58,862 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:21:58,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:21:58,862 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:21:58,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:21:58,863 INFO L82 PathProgramCache]: Analyzing trace with hash 2127231662, now seen corresponding path program 1 times [2020-10-28 18:21:58,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:21:58,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770523976] [2020-10-28 18:21:58,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:21:58,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:21:58,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:58,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:59,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:59,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:59,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:59,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:21:59,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:01,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:01,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:01,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:01,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:01,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:01,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:01,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:02,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:03,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:22:03,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-28 18:22:03,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 18:22:03,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 18:22:03,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:22:03,938 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:22:03,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:22:03,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:22:03,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-28 18:22:03,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:22:05,678 WARN L193 SmtUtils]: Spent 1.60 s on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:22:05,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:22:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:22:05,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:05,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:22:05,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:22:05,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:22:05,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 18:22:05,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:22:05,708 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:22:05,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:22:05,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:22:05,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:22:05,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:22:05,887 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 18:22:05,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770523976] [2020-10-28 18:22:05,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:22:05,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:22:05,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945093993] [2020-10-28 18:22:05,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:22:05,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:22:05,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:22:05,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:22:05,890 INFO L87 Difference]: Start difference. First operand 58908 states and 88708 transitions. Second operand 5 states. [2020-10-28 18:22:20,862 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification that was a NOOP. DAG size: 352 [2020-10-28 18:22:25,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:22:25,674 INFO L93 Difference]: Finished difference Result 173564 states and 260970 transitions. [2020-10-28 18:22:25,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:22:25,675 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 307 [2020-10-28 18:22:25,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:22:26,066 INFO L225 Difference]: With dead ends: 173564 [2020-10-28 18:22:26,066 INFO L226 Difference]: Without dead ends: 115282 [2020-10-28 18:22:26,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:22:26,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115282 states. [2020-10-28 18:22:31,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115282 to 115032. [2020-10-28 18:22:31,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115032 states. [2020-10-28 18:22:32,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115032 states to 115032 states and 171912 transitions. [2020-10-28 18:22:32,030 INFO L78 Accepts]: Start accepts. Automaton has 115032 states and 171912 transitions. Word has length 307 [2020-10-28 18:22:32,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:22:32,031 INFO L481 AbstractCegarLoop]: Abstraction has 115032 states and 171912 transitions. [2020-10-28 18:22:32,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:22:32,031 INFO L276 IsEmpty]: Start isEmpty. Operand 115032 states and 171912 transitions. [2020-10-28 18:22:32,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-28 18:22:32,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:22:32,167 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:22:32,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:22:32,168 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:22:32,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:22:32,168 INFO L82 PathProgramCache]: Analyzing trace with hash 378840121, now seen corresponding path program 1 times [2020-10-28 18:22:32,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:22:32,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741674786] [2020-10-28 18:22:32,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:22:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:22:32,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:32,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:32,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:32,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:32,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:32,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:32,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:32,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:33,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:33,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:33,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:33,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:37,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:22:37,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-28 18:22:37,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:22:37,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-28 18:22:37,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:22:37,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:22:37,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:22:37,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 18:22:37,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-28 18:22:37,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:22:38,971 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification that was a NOOP. DAG size: 346 [2020-10-28 18:22:38,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:22:38,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:22:38,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:22:39,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:22:39,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:22:39,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:22:39,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 18:22:39,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:22:39,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:22:39,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:22:39,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:22:39,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:22:39,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:22:39,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 18:22:39,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741674786] [2020-10-28 18:22:39,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:22:39,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:22:39,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255714818] [2020-10-28 18:22:39,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:22:39,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:22:39,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:22:39,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:22:39,272 INFO L87 Difference]: Start difference. First operand 115032 states and 171912 transitions. Second operand 5 states.