/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_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 18:58:02,024 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 18:58:02,029 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 18:58:02,093 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 18:58:02,093 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 18:58:02,102 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 18:58:02,105 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 18:58:02,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 18:58:02,114 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 18:58:02,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 18:58:02,123 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 18:58:02,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 18:58:02,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 18:58:02,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 18:58:02,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 18:58:02,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 18:58:02,135 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 18:58:02,139 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 18:58:02,148 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 18:58:02,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 18:58:02,154 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 18:58:02,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 18:58:02,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 18:58:02,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 18:58:02,175 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 18:58:02,175 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 18:58:02,175 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 18:58:02,177 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 18:58:02,177 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 18:58:02,178 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 18:58:02,179 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 18:58:02,180 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 18:58:02,181 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 18:58:02,181 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 18:58:02,183 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 18:58:02,183 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 18:58:02,184 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 18:58:02,184 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 18:58:02,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 18:58:02,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 18:58:02,186 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 18:58:02,187 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 18:58:02,235 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 18:58:02,236 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 18:58:02,240 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 18:58:02,240 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 18:58:02,241 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 18:58:02,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 18:58:02,241 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 18:58:02,241 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 18:58:02,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 18:58:02,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 18:58:02,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 18:58:02,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 18:58:02,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 18:58:02,244 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 18:58:02,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 18:58:02,244 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 18:58:02,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 18:58:02,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 18:58:02,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 18:58:02,245 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 18:58:02,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 18:58:02,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 18:58:02,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 18:58:02,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 18:58:02,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 18:58:02,246 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 18:58:02,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 18:58:02,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 18:58:02,247 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 18:58:02,247 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 18:58:02,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 18:58:02,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 18:58:02,664 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 18:58:02,666 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 18:58:02,667 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 18:58:02,668 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 18:58:02,760 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8771b372f/7d96b6b71d984a8da98777ecee63cb25/FLAGfb6f183c6 [2020-10-28 18:58:03,564 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 18:58:03,565 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 18:58:03,583 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8771b372f/7d96b6b71d984a8da98777ecee63cb25/FLAGfb6f183c6 [2020-10-28 18:58:03,850 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8771b372f/7d96b6b71d984a8da98777ecee63cb25 [2020-10-28 18:58:03,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 18:58:03,860 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 18:58:03,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 18:58:03,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 18:58:03,873 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 18:58:03,874 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:58:03" (1/1) ... [2020-10-28 18:58:03,879 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d63d03a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:03, skipping insertion in model container [2020-10-28 18:58:03,879 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 06:58:03" (1/1) ... [2020-10-28 18:58:03,889 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 18:58:03,964 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 18:58:04,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:58:04,280 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 18:58:04,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 18:58:04,412 INFO L208 MainTranslator]: Completed translation [2020-10-28 18:58:04,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:04 WrapperNode [2020-10-28 18:58:04,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 18:58:04,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 18:58:04,417 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 18:58:04,417 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 18:58:04,430 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:04" (1/1) ... [2020-10-28 18:58:04,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:04" (1/1) ... [2020-10-28 18:58:04,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:04" (1/1) ... [2020-10-28 18:58:04,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:04" (1/1) ... [2020-10-28 18:58:04,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:04" (1/1) ... [2020-10-28 18:58:04,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:04" (1/1) ... [2020-10-28 18:58:04,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:04" (1/1) ... [2020-10-28 18:58:04,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 18:58:04,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 18:58:04,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 18:58:04,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 18:58:04,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:04" (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 18:58:04,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 18:58:04,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 18:58:04,609 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 18:58:04,609 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 18:58:04,610 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 18:58:04,611 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 18:58:04,611 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 18:58:04,611 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 18:58:04,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 18:58:04,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 18:58:04,612 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 18:58:04,612 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 18:58:04,613 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 18:58:04,613 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 18:58:04,613 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 18:58:04,614 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 18:58:04,614 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 18:58:04,614 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 18:58:04,614 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 18:58:04,614 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 18:58:04,614 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 18:58:04,615 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 18:58:04,615 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 18:58:04,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 18:58:04,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 18:58:04,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 18:58:04,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 18:58:04,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 18:58:04,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 18:58:05,528 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 18:58:05,528 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 18:58:05,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:58:05 BoogieIcfgContainer [2020-10-28 18:58:05,531 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 18:58:05,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 18:58:05,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 18:58:05,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 18:58:05,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 06:58:03" (1/3) ... [2020-10-28 18:58:05,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55283eea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:58:05, skipping insertion in model container [2020-10-28 18:58:05,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 06:58:04" (2/3) ... [2020-10-28 18:58:05,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55283eea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 06:58:05, skipping insertion in model container [2020-10-28 18:58:05,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 06:58:05" (3/3) ... [2020-10-28 18:58:05,542 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 18:58:05,556 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 18:58:05,562 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 18:58:05,578 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 18:58:05,610 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 18:58:05,611 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 18:58:05,611 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 18:58:05,611 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 18:58:05,611 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 18:58:05,611 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 18:58:05,612 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 18:58:05,612 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 18:58:05,638 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states. [2020-10-28 18:58:05,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 18:58:05,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:58:05,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:58:05,651 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:58:05,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:58:05,658 INFO L82 PathProgramCache]: Analyzing trace with hash 615784456, now seen corresponding path program 1 times [2020-10-28 18:58:05,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:58:05,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179702177] [2020-10-28 18:58:05,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:58:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:06,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:06,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:06,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:09,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:09,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 18:58:09,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 18:58:09,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3245 [2020-10-28 18:58:09,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:09,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:09,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:58:09,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 18:58:09,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 18:58:09,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 18:58:09,656 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:58:09,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:58:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:09,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:09,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:09,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:58:09,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:58:09,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 18:58:09,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:09,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:09,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:58:09,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:58:09,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:58:09,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:58:09,758 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 18:58:09,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179702177] [2020-10-28 18:58:09,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:58:09,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:58:09,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092950783] [2020-10-28 18:58:09,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:58:09,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:58:09,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:58:09,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:58:09,793 INFO L87 Difference]: Start difference. First operand 188 states. Second operand 4 states. [2020-10-28 18:58:10,091 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-28 18:58:11,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:58:11,032 INFO L93 Difference]: Finished difference Result 377 states and 613 transitions. [2020-10-28 18:58:11,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:58:11,035 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-28 18:58:11,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:58:11,050 INFO L225 Difference]: With dead ends: 377 [2020-10-28 18:58:11,050 INFO L226 Difference]: Without dead ends: 280 [2020-10-28 18:58:11,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:58:11,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-28 18:58:11,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 277. [2020-10-28 18:58:11,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-28 18:58:11,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 415 transitions. [2020-10-28 18:58:11,156 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 415 transitions. Word has length 69 [2020-10-28 18:58:11,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:58:11,157 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 415 transitions. [2020-10-28 18:58:11,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:58:11,158 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 415 transitions. [2020-10-28 18:58:11,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 18:58:11,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:58:11,161 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:58:11,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 18:58:11,162 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:58:11,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:58:11,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1851022144, now seen corresponding path program 1 times [2020-10-28 18:58:11,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:58:11,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304944410] [2020-10-28 18:58:11,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:58:11,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:11,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:11,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:12,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:12,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 18:58:12,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:58:12,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1030 [2020-10-28 18:58:12,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:12,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:12,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:58:12,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-28 18:58:12,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 18:58:12,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 18:58:12,592 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:58:12,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:58:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:12,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:12,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:12,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:58:12,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:58:12,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 18:58:12,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:12,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:12,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:58:12,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:58:12,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:58:12,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:58:12,649 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 18:58:12,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304944410] [2020-10-28 18:58:12,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:58:12,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:58:12,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607624343] [2020-10-28 18:58:12,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:58:12,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:58:12,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:58:12,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:58:12,654 INFO L87 Difference]: Start difference. First operand 277 states and 415 transitions. Second operand 5 states. [2020-10-28 18:58:13,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:58:13,375 INFO L93 Difference]: Finished difference Result 419 states and 638 transitions. [2020-10-28 18:58:13,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 18:58:13,375 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-28 18:58:13,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:58:13,380 INFO L225 Difference]: With dead ends: 419 [2020-10-28 18:58:13,380 INFO L226 Difference]: Without dead ends: 416 [2020-10-28 18:58:13,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:58:13,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-10-28 18:58:13,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 279. [2020-10-28 18:58:13,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-10-28 18:58:13,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 417 transitions. [2020-10-28 18:58:13,432 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 417 transitions. Word has length 70 [2020-10-28 18:58:13,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:58:13,435 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 417 transitions. [2020-10-28 18:58:13,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:58:13,435 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 417 transitions. [2020-10-28 18:58:13,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 18:58:13,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:58:13,438 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:58:13,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 18:58:13,439 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:58:13,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:58:13,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1588817055, now seen corresponding path program 1 times [2020-10-28 18:58:13,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:58:13,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686839555] [2020-10-28 18:58:13,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:58:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:13,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:13,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:14,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:14,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-28 18:58:14,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 18:58:14,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1162 [2020-10-28 18:58:14,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:14,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:14,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 18:58:14,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 18:58:14,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-28 18:58:14,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:58:14,946 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:58:14,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:58:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:14,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:14,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:14,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:58:14,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:58:14,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:58:14,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:14,966 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:14,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:58:14,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:58:14,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:58:14,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:14,993 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 18:58:14,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686839555] [2020-10-28 18:58:14,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:58:14,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:58:14,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959925216] [2020-10-28 18:58:14,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 18:58:14,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:58:14,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 18:58:14,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:58:14,996 INFO L87 Difference]: Start difference. First operand 279 states and 417 transitions. Second operand 5 states. [2020-10-28 18:58:15,220 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:58:15,858 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 18:58:16,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:58:16,306 INFO L93 Difference]: Finished difference Result 588 states and 904 transitions. [2020-10-28 18:58:16,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:58:16,307 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-28 18:58:16,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:58:16,310 INFO L225 Difference]: With dead ends: 588 [2020-10-28 18:58:16,311 INFO L226 Difference]: Without dead ends: 427 [2020-10-28 18:58:16,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:58:16,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-10-28 18:58:16,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 422. [2020-10-28 18:58:16,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2020-10-28 18:58:16,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 642 transitions. [2020-10-28 18:58:16,364 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 642 transitions. Word has length 71 [2020-10-28 18:58:16,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:58:16,365 INFO L481 AbstractCegarLoop]: Abstraction has 422 states and 642 transitions. [2020-10-28 18:58:16,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 18:58:16,366 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 642 transitions. [2020-10-28 18:58:16,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 18:58:16,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:58:16,374 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:58:16,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 18:58:16,374 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:58:16,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:58:16,375 INFO L82 PathProgramCache]: Analyzing trace with hash -499244314, now seen corresponding path program 1 times [2020-10-28 18:58:16,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:58:16,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598506256] [2020-10-28 18:58:16,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:58:16,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:16,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:16,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:16,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:16,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:18,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:21,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:21,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 18:58:21,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:58:21,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 18:58:21,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:21,445 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:21,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:58:21,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-28 18:58:21,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 18:58:21,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-28 18:58:21,677 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:58:21,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:58:21,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:21,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:21,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:21,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:58:21,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:58:21,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:58:21,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:21,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:21,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:58:21,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:58:21,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:58:21,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:21,722 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 18:58:21,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598506256] [2020-10-28 18:58:21,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:58:21,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:58:21,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056573901] [2020-10-28 18:58:21,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:58:21,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:58:21,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:58:21,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:58:21,727 INFO L87 Difference]: Start difference. First operand 422 states and 642 transitions. Second operand 4 states. [2020-10-28 18:58:21,924 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 18:58:22,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:58:22,656 INFO L93 Difference]: Finished difference Result 1058 states and 1642 transitions. [2020-10-28 18:58:22,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:58:22,657 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-28 18:58:22,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:58:22,662 INFO L225 Difference]: With dead ends: 1058 [2020-10-28 18:58:22,662 INFO L226 Difference]: Without dead ends: 736 [2020-10-28 18:58:22,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:58:22,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2020-10-28 18:58:22,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 733. [2020-10-28 18:58:22,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 733 states. [2020-10-28 18:58:22,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1120 transitions. [2020-10-28 18:58:22,711 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1120 transitions. Word has length 72 [2020-10-28 18:58:22,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:58:22,712 INFO L481 AbstractCegarLoop]: Abstraction has 733 states and 1120 transitions. [2020-10-28 18:58:22,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:58:22,712 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1120 transitions. [2020-10-28 18:58:22,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 18:58:22,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:58:22,713 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:58:22,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 18:58:22,714 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:58:22,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:58:22,714 INFO L82 PathProgramCache]: Analyzing trace with hash -2053053784, now seen corresponding path program 1 times [2020-10-28 18:58:22,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:58:22,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139192364] [2020-10-28 18:58:22,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:58:22,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:22,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:22,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:22,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:23,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:24,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:27,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:27,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 18:58:27,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:58:27,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 18:58:27,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:27,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:27,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:58:27,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-28 18:58:27,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 18:58:27,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:27,981 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:58:27,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:58:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:27,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:28,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:28,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:58:28,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:58:28,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:58:28,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:28,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:28,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:58:28,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:58:28,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:58:28,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:28,026 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 18:58:28,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139192364] [2020-10-28 18:58:28,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:58:28,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:58:28,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382864976] [2020-10-28 18:58:28,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:58:28,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:58:28,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:58:28,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:58:28,039 INFO L87 Difference]: Start difference. First operand 733 states and 1120 transitions. Second operand 4 states. [2020-10-28 18:58:28,239 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 18:58:29,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:58:29,011 INFO L93 Difference]: Finished difference Result 1863 states and 2878 transitions. [2020-10-28 18:58:29,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:58:29,011 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-28 18:58:29,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:58:29,019 INFO L225 Difference]: With dead ends: 1863 [2020-10-28 18:58:29,019 INFO L226 Difference]: Without dead ends: 1290 [2020-10-28 18:58:29,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:58:29,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2020-10-28 18:58:29,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 1287. [2020-10-28 18:58:29,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1287 states. [2020-10-28 18:58:29,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 1958 transitions. [2020-10-28 18:58:29,102 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 1958 transitions. Word has length 72 [2020-10-28 18:58:29,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:58:29,102 INFO L481 AbstractCegarLoop]: Abstraction has 1287 states and 1958 transitions. [2020-10-28 18:58:29,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:58:29,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 1958 transitions. [2020-10-28 18:58:29,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 18:58:29,104 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:58:29,104 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:58:29,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 18:58:29,104 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:58:29,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:58:29,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1724317976, now seen corresponding path program 1 times [2020-10-28 18:58:29,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:58:29,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395059282] [2020-10-28 18:58:29,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:58:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:29,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:29,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:29,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:29,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:31,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:34,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:34,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 18:58:34,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:58:34,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 18:58:34,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:34,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:34,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:58:34,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-28 18:58:34,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 18:58:34,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:58:34,338 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:58:34,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:58:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:34,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:34,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:34,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:58:34,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:58:34,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 18:58:34,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:34,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:34,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:58:34,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:58:34,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:58:34,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 18:58:34,399 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 18:58:34,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395059282] [2020-10-28 18:58:34,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:58:34,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:58:34,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799234109] [2020-10-28 18:58:34,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:58:34,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:58:34,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:58:34,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:58:34,404 INFO L87 Difference]: Start difference. First operand 1287 states and 1958 transitions. Second operand 4 states. [2020-10-28 18:58:34,664 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 18:58:35,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:58:35,527 INFO L93 Difference]: Finished difference Result 3467 states and 5292 transitions. [2020-10-28 18:58:35,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:58:35,528 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-28 18:58:35,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:58:35,542 INFO L225 Difference]: With dead ends: 3467 [2020-10-28 18:58:35,543 INFO L226 Difference]: Without dead ends: 2332 [2020-10-28 18:58:35,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:58:35,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2020-10-28 18:58:35,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 2329. [2020-10-28 18:58:35,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2329 states. [2020-10-28 18:58:35,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2329 states to 2329 states and 3496 transitions. [2020-10-28 18:58:35,699 INFO L78 Accepts]: Start accepts. Automaton has 2329 states and 3496 transitions. Word has length 72 [2020-10-28 18:58:35,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:58:35,700 INFO L481 AbstractCegarLoop]: Abstraction has 2329 states and 3496 transitions. [2020-10-28 18:58:35,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:58:35,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2329 states and 3496 transitions. [2020-10-28 18:58:35,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 18:58:35,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:58:35,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:58:35,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 18:58:35,702 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:58:35,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:58:35,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1386578266, now seen corresponding path program 1 times [2020-10-28 18:58:35,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:58:35,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10996796] [2020-10-28 18:58:35,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:58:35,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:35,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:35,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:35,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:35,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:37,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:39,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:39,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 18:58:39,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:58:39,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4188 [2020-10-28 18:58:39,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:39,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:39,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:58:39,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-28 18:58:39,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 18:58:39,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:40,111 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:58:40,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:58:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:40,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:40,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:40,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:58:40,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:58:40,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 18:58:40,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:40,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:40,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:58:40,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:58:40,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:58:40,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:40,149 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 18:58:40,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10996796] [2020-10-28 18:58:40,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:58:40,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 18:58:40,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189357810] [2020-10-28 18:58:40,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 18:58:40,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:58:40,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 18:58:40,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 18:58:40,153 INFO L87 Difference]: Start difference. First operand 2329 states and 3496 transitions. Second operand 4 states. [2020-10-28 18:58:40,346 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 18:58:41,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:58:41,252 INFO L93 Difference]: Finished difference Result 6366 states and 9572 transitions. [2020-10-28 18:58:41,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 18:58:41,253 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-28 18:58:41,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:58:41,276 INFO L225 Difference]: With dead ends: 6366 [2020-10-28 18:58:41,276 INFO L226 Difference]: Without dead ends: 4211 [2020-10-28 18:58:41,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 18:58:41,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4211 states. [2020-10-28 18:58:41,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4211 to 4208. [2020-10-28 18:58:41,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4208 states. [2020-10-28 18:58:41,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4208 states to 4208 states and 6240 transitions. [2020-10-28 18:58:41,571 INFO L78 Accepts]: Start accepts. Automaton has 4208 states and 6240 transitions. Word has length 72 [2020-10-28 18:58:41,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:58:41,571 INFO L481 AbstractCegarLoop]: Abstraction has 4208 states and 6240 transitions. [2020-10-28 18:58:41,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 18:58:41,571 INFO L276 IsEmpty]: Start isEmpty. Operand 4208 states and 6240 transitions. [2020-10-28 18:58:41,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 18:58:41,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:58:41,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:58:41,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 18:58:41,575 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:58:41,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:58:41,575 INFO L82 PathProgramCache]: Analyzing trace with hash 767112387, now seen corresponding path program 1 times [2020-10-28 18:58:41,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:58:41,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320073945] [2020-10-28 18:58:41,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:58:41,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:41,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:41,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:41,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:41,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:42,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:43,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:43,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 18:58:43,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:58:43,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2166 [2020-10-28 18:58:43,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:43,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:43,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:58:43,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:58:43,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 18:58:43,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:44,129 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:58:44,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:58:44,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:44,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:44,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:44,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:58:44,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:58:44,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 18:58:44,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:44,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:44,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:58:44,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:58:44,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:58:44,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:44,207 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 18:58:44,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320073945] [2020-10-28 18:58:44,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:58:44,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:58:44,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147848859] [2020-10-28 18:58:44,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:58:44,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:58:44,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:58:44,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:58:44,209 INFO L87 Difference]: Start difference. First operand 4208 states and 6240 transitions. Second operand 8 states. [2020-10-28 18:58:44,409 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 18:58:45,292 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 18:58:46,522 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:58:47,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:58:47,155 INFO L93 Difference]: Finished difference Result 24231 states and 36052 transitions. [2020-10-28 18:58:47,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:58:47,156 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-10-28 18:58:47,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:58:47,252 INFO L225 Difference]: With dead ends: 24231 [2020-10-28 18:58:47,253 INFO L226 Difference]: Without dead ends: 20679 [2020-10-28 18:58:47,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:58:47,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20679 states. [2020-10-28 18:58:47,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20679 to 4424. [2020-10-28 18:58:47,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4424 states. [2020-10-28 18:58:47,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4424 states to 4424 states and 6448 transitions. [2020-10-28 18:58:47,848 INFO L78 Accepts]: Start accepts. Automaton has 4424 states and 6448 transitions. Word has length 73 [2020-10-28 18:58:47,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:58:47,848 INFO L481 AbstractCegarLoop]: Abstraction has 4424 states and 6448 transitions. [2020-10-28 18:58:47,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:58:47,848 INFO L276 IsEmpty]: Start isEmpty. Operand 4424 states and 6448 transitions. [2020-10-28 18:58:47,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 18:58:47,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:58:47,854 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:58:47,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 18:58:47,854 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:58:47,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:58:47,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1599299220, now seen corresponding path program 1 times [2020-10-28 18:58:47,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:58:47,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780972629] [2020-10-28 18:58:47,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:58:47,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:47,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:47,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:48,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:48,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:48,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:49,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:49,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 18:58:49,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:58:49,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1990 [2020-10-28 18:58:49,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:49,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:49,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:58:49,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:58:49,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-28 18:58:49,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:50,117 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:58:50,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:58:50,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:50,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:50,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:50,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:58:50,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:58:50,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 18:58:50,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:50,143 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:50,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:58:50,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:58:50,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:58:50,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:50,175 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 18:58:50,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780972629] [2020-10-28 18:58:50,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:58:50,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:58:50,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842146659] [2020-10-28 18:58:50,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:58:50,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:58:50,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:58:50,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:58:50,178 INFO L87 Difference]: Start difference. First operand 4424 states and 6448 transitions. Second operand 8 states. [2020-10-28 18:58:50,387 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-28 18:58:51,260 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:58:52,573 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 18:58:53,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:58:53,214 INFO L93 Difference]: Finished difference Result 21193 states and 31034 transitions. [2020-10-28 18:58:53,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:58:53,215 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-10-28 18:58:53,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:58:53,260 INFO L225 Difference]: With dead ends: 21193 [2020-10-28 18:58:53,261 INFO L226 Difference]: Without dead ends: 17707 [2020-10-28 18:58:53,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:58:53,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17707 states. [2020-10-28 18:58:53,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17707 to 4792. [2020-10-28 18:58:53,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4792 states. [2020-10-28 18:58:53,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4792 states to 4792 states and 6856 transitions. [2020-10-28 18:58:53,969 INFO L78 Accepts]: Start accepts. Automaton has 4792 states and 6856 transitions. Word has length 73 [2020-10-28 18:58:53,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:58:53,969 INFO L481 AbstractCegarLoop]: Abstraction has 4792 states and 6856 transitions. [2020-10-28 18:58:53,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:58:53,970 INFO L276 IsEmpty]: Start isEmpty. Operand 4792 states and 6856 transitions. [2020-10-28 18:58:53,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 18:58:53,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:58:53,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:58:53,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 18:58:53,975 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:58:53,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:58:53,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1559061834, now seen corresponding path program 1 times [2020-10-28 18:58:53,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:58:53,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751612738] [2020-10-28 18:58:53,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:58:54,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:54,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:54,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:54,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:54,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:54,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:56,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:56,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 18:58:56,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:58:56,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2346 [2020-10-28 18:58:56,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:56,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:56,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:58:56,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:58:56,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 18:58:56,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:56,673 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:58:56,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:58:56,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:58:56,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:58:56,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:58:56,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:58:56,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:58:56,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 18:58:56,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:58:56,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:58:56,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:58:56,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:58:56,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:58:56,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:58:56,748 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 18:58:56,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751612738] [2020-10-28 18:58:56,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:58:56,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:58:56,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144934537] [2020-10-28 18:58:56,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:58:56,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:58:56,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:58:56,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:58:56,751 INFO L87 Difference]: Start difference. First operand 4792 states and 6856 transitions. Second operand 8 states. [2020-10-28 18:58:56,954 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 18:58:57,869 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 18:58:59,115 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:59:00,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:59:00,192 INFO L93 Difference]: Finished difference Result 26207 states and 37788 transitions. [2020-10-28 18:59:00,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:59:00,192 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-10-28 18:59:00,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:59:00,257 INFO L225 Difference]: With dead ends: 26207 [2020-10-28 18:59:00,257 INFO L226 Difference]: Without dead ends: 22529 [2020-10-28 18:59:00,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:59:00,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22529 states. [2020-10-28 18:59:01,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22529 to 5120. [2020-10-28 18:59:01,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5120 states. [2020-10-28 18:59:01,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5120 states to 5120 states and 7190 transitions. [2020-10-28 18:59:01,039 INFO L78 Accepts]: Start accepts. Automaton has 5120 states and 7190 transitions. Word has length 73 [2020-10-28 18:59:01,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:59:01,040 INFO L481 AbstractCegarLoop]: Abstraction has 5120 states and 7190 transitions. [2020-10-28 18:59:01,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:59:01,040 INFO L276 IsEmpty]: Start isEmpty. Operand 5120 states and 7190 transitions. [2020-10-28 18:59:01,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 18:59:01,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:59:01,046 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 18:59:01,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 18:59:01,046 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:59:01,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:59:01,047 INFO L82 PathProgramCache]: Analyzing trace with hash 315644005, now seen corresponding path program 1 times [2020-10-28 18:59:01,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:59:01,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273276168] [2020-10-28 18:59:01,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:59:01,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:01,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:01,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:01,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:01,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:01,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:03,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:03,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 18:59:03,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 18:59:03,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2032 [2020-10-28 18:59:03,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:03,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:03,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 18:59:03,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:59:03,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 18:59:03,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:03,414 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:59:03,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:59:03,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:03,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:03,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:03,449 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:59:03,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:59:03,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 18:59:03,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:03,450 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:03,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:59:03,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:59:03,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:59:03,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:03,487 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 18:59:03,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273276168] [2020-10-28 18:59:03,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:59:03,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:59:03,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586632756] [2020-10-28 18:59:03,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 18:59:03,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:59:03,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 18:59:03,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 18:59:03,489 INFO L87 Difference]: Start difference. First operand 5120 states and 7190 transitions. Second operand 8 states. [2020-10-28 18:59:03,721 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 18:59:04,661 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 18:59:06,061 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:59:06,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:59:06,892 INFO L93 Difference]: Finished difference Result 20256 states and 28687 transitions. [2020-10-28 18:59:06,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 18:59:06,893 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 73 [2020-10-28 18:59:06,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:59:06,924 INFO L225 Difference]: With dead ends: 20256 [2020-10-28 18:59:06,924 INFO L226 Difference]: Without dead ends: 16394 [2020-10-28 18:59:06,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:59:06,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16394 states. [2020-10-28 18:59:07,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16394 to 5309. [2020-10-28 18:59:07,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5309 states. [2020-10-28 18:59:07,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5309 states to 5309 states and 7315 transitions. [2020-10-28 18:59:07,557 INFO L78 Accepts]: Start accepts. Automaton has 5309 states and 7315 transitions. Word has length 73 [2020-10-28 18:59:07,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:59:07,557 INFO L481 AbstractCegarLoop]: Abstraction has 5309 states and 7315 transitions. [2020-10-28 18:59:07,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 18:59:07,557 INFO L276 IsEmpty]: Start isEmpty. Operand 5309 states and 7315 transitions. [2020-10-28 18:59:07,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 18:59:07,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:59:07,563 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] [2020-10-28 18:59:07,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 18:59:07,564 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:59:07,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:59:07,564 INFO L82 PathProgramCache]: Analyzing trace with hash -2093316009, now seen corresponding path program 1 times [2020-10-28 18:59:07,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:59:07,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215804934] [2020-10-28 18:59:07,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:59:07,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:07,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:07,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:07,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:08,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:08,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:08,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:08,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:08,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:08,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:09,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:09,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:12,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:12,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 18:59:12,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:59:12,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 18:59:12,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:12,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:12,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:59:12,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:59:12,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-28 18:59:12,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:12,834 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:59:12,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:59:12,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:12,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:12,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:12,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:59:12,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:59:12,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 18:59:12,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:12,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:12,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:59:12,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:59:12,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:59:12,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:12,891 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 18:59:12,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215804934] [2020-10-28 18:59:12,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:59:12,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:59:12,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203424557] [2020-10-28 18:59:12,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:59:12,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:59:12,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:59:12,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:59:12,894 INFO L87 Difference]: Start difference. First operand 5309 states and 7315 transitions. Second operand 6 states. [2020-10-28 18:59:13,154 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 18:59:13,985 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-28 18:59:14,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:59:14,836 INFO L93 Difference]: Finished difference Result 11711 states and 16250 transitions. [2020-10-28 18:59:14,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:59:14,837 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-10-28 18:59:14,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:59:14,851 INFO L225 Difference]: With dead ends: 11711 [2020-10-28 18:59:14,851 INFO L226 Difference]: Without dead ends: 6967 [2020-10-28 18:59:14,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 18:59:14,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6967 states. [2020-10-28 18:59:15,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6967 to 6932. [2020-10-28 18:59:15,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6932 states. [2020-10-28 18:59:15,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6932 states to 6932 states and 9508 transitions. [2020-10-28 18:59:15,695 INFO L78 Accepts]: Start accepts. Automaton has 6932 states and 9508 transitions. Word has length 74 [2020-10-28 18:59:15,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:59:15,696 INFO L481 AbstractCegarLoop]: Abstraction has 6932 states and 9508 transitions. [2020-10-28 18:59:15,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:59:15,696 INFO L276 IsEmpty]: Start isEmpty. Operand 6932 states and 9508 transitions. [2020-10-28 18:59:15,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 18:59:15,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:59:15,702 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] [2020-10-28 18:59:15,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 18:59:15,703 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:59:15,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:59:15,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1595085493, now seen corresponding path program 1 times [2020-10-28 18:59:15,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:59:15,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744038763] [2020-10-28 18:59:15,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:59:15,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:15,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:15,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:15,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:15,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:16,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:16,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:16,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:16,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:17,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:17,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:18,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:19,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:20,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:20,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 18:59:20,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 18:59:20,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 18:59:20,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:20,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:20,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 18:59:20,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 18:59:20,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 18:59:20,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:20,958 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:59:20,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:59:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:20,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:20,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:20,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:59:20,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:59:20,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 18:59:20,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:20,976 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:20,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:59:20,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:59:20,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:59:20,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:20,991 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 18:59:20,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744038763] [2020-10-28 18:59:20,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:59:20,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 18:59:20,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784661033] [2020-10-28 18:59:20,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 18:59:20,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:59:20,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 18:59:20,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 18:59:20,993 INFO L87 Difference]: Start difference. First operand 6932 states and 9508 transitions. Second operand 7 states. [2020-10-28 18:59:21,240 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:59:22,085 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 18:59:22,284 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 18:59:24,360 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-28 18:59:24,572 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-28 18:59:24,811 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 18:59:25,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:59:25,363 INFO L93 Difference]: Finished difference Result 25131 states and 35189 transitions. [2020-10-28 18:59:25,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 18:59:25,363 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 74 [2020-10-28 18:59:25,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:59:25,385 INFO L225 Difference]: With dead ends: 25131 [2020-10-28 18:59:25,385 INFO L226 Difference]: Without dead ends: 20080 [2020-10-28 18:59:25,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-28 18:59:25,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20080 states. [2020-10-28 18:59:26,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20080 to 8224. [2020-10-28 18:59:26,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8224 states. [2020-10-28 18:59:26,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8224 states to 8224 states and 11349 transitions. [2020-10-28 18:59:26,745 INFO L78 Accepts]: Start accepts. Automaton has 8224 states and 11349 transitions. Word has length 74 [2020-10-28 18:59:26,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:59:26,745 INFO L481 AbstractCegarLoop]: Abstraction has 8224 states and 11349 transitions. [2020-10-28 18:59:26,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 18:59:26,746 INFO L276 IsEmpty]: Start isEmpty. Operand 8224 states and 11349 transitions. [2020-10-28 18:59:26,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 18:59:26,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:59:26,753 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] [2020-10-28 18:59:26,753 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 18:59:26,753 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:59:26,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:59:26,754 INFO L82 PathProgramCache]: Analyzing trace with hash -329778985, now seen corresponding path program 1 times [2020-10-28 18:59:26,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:59:26,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789586820] [2020-10-28 18:59:26,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:59:26,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:26,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:26,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:26,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:26,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:27,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:27,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:28,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:28,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:28,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:28,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:28,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:31,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:31,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 18:59:31,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 18:59:31,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 18:59:31,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:31,793 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:31,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:59:31,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 18:59:31,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 18:59:31,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:31,998 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:59:31,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:59:32,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:32,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:32,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:32,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:59:32,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:59:32,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 18:59:32,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:32,016 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:32,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 18:59:32,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:59:32,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 18:59:32,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:32,028 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 18:59:32,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789586820] [2020-10-28 18:59:32,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:59:32,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 18:59:32,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545404655] [2020-10-28 18:59:32,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:59:32,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:59:32,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:59:32,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:59:32,031 INFO L87 Difference]: Start difference. First operand 8224 states and 11349 transitions. Second operand 6 states. [2020-10-28 18:59:32,222 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 18:59:33,760 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 18:59:34,136 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 18:59:41,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:59:41,415 INFO L93 Difference]: Finished difference Result 59870 states and 84625 transitions. [2020-10-28 18:59:41,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 18:59:41,415 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-10-28 18:59:41,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:59:41,481 INFO L225 Difference]: With dead ends: 59870 [2020-10-28 18:59:41,481 INFO L226 Difference]: Without dead ends: 52775 [2020-10-28 18:59:41,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 18:59:41,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52775 states. [2020-10-28 18:59:45,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52775 to 27470. [2020-10-28 18:59:45,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27470 states. [2020-10-28 18:59:45,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27470 states to 27470 states and 38569 transitions. [2020-10-28 18:59:45,718 INFO L78 Accepts]: Start accepts. Automaton has 27470 states and 38569 transitions. Word has length 74 [2020-10-28 18:59:45,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 18:59:45,719 INFO L481 AbstractCegarLoop]: Abstraction has 27470 states and 38569 transitions. [2020-10-28 18:59:45,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 18:59:45,719 INFO L276 IsEmpty]: Start isEmpty. Operand 27470 states and 38569 transitions. [2020-10-28 18:59:45,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 18:59:45,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 18:59:45,727 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] [2020-10-28 18:59:45,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 18:59:45,728 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 18:59:45,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 18:59:45,728 INFO L82 PathProgramCache]: Analyzing trace with hash -259105990, now seen corresponding path program 1 times [2020-10-28 18:59:45,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 18:59:45,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539167272] [2020-10-28 18:59:45,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 18:59:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:45,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:45,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:45,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:46,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:46,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:46,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:46,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:46,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:47,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:47,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:47,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:47,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:48,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:48,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:48,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:49,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:50,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:50,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 18:59:50,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 18:59:50,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 18:59:50,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:50,761 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:50,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 18:59:50,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 18:59:50,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 18:59:50,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:50,997 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 18:59:50,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 18:59:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 18:59:51,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 18:59:51,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 18:59:51,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 18:59:51,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 18:59:51,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 18:59:51,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 18:59:51,019 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 18:59:51,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 18:59:51,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 18:59:51,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 18:59:51,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 18:59:51,035 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 18:59:51,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539167272] [2020-10-28 18:59:51,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 18:59:51,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 18:59:51,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733360327] [2020-10-28 18:59:51,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 18:59:51,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 18:59:51,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 18:59:51,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-28 18:59:51,038 INFO L87 Difference]: Start difference. First operand 27470 states and 38569 transitions. Second operand 6 states. [2020-10-28 18:59:51,255 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 18:59:52,379 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 18:59:59,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 18:59:59,283 INFO L93 Difference]: Finished difference Result 78410 states and 110911 transitions. [2020-10-28 18:59:59,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 18:59:59,283 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-28 18:59:59,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 18:59:59,362 INFO L225 Difference]: With dead ends: 78410 [2020-10-28 18:59:59,362 INFO L226 Difference]: Without dead ends: 51819 [2020-10-28 18:59:59,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-28 18:59:59,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51819 states. [2020-10-28 19:00:06,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51819 to 51624. [2020-10-28 19:00:06,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51624 states. [2020-10-28 19:00:06,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51624 states to 51624 states and 72715 transitions. [2020-10-28 19:00:06,791 INFO L78 Accepts]: Start accepts. Automaton has 51624 states and 72715 transitions. Word has length 75 [2020-10-28 19:00:06,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:00:06,791 INFO L481 AbstractCegarLoop]: Abstraction has 51624 states and 72715 transitions. [2020-10-28 19:00:06,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 19:00:06,791 INFO L276 IsEmpty]: Start isEmpty. Operand 51624 states and 72715 transitions. [2020-10-28 19:00:06,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 19:00:06,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:00:06,800 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] [2020-10-28 19:00:06,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 19:00:06,800 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:00:06,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:00:06,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1632612710, now seen corresponding path program 1 times [2020-10-28 19:00:06,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:00:06,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307506819] [2020-10-28 19:00:06,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:00:06,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:06,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:06,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:06,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:06,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:07,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:07,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:09,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:11,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:11,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 19:00:11,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 19:00:11,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 19:00:11,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:11,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:11,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 19:00:11,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 19:00:11,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-28 19:00:11,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:12,078 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 19:00:12,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:00:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:12,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:12,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:12,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:00:12,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:00:12,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 19:00:12,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:12,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:12,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:00:12,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:00:12,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:00:12,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:12,113 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 19:00:12,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307506819] [2020-10-28 19:00:12,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:00:12,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 19:00:12,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316278834] [2020-10-28 19:00:12,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 19:00:12,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:00:12,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 19:00:12,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:00:12,115 INFO L87 Difference]: Start difference. First operand 51624 states and 72715 transitions. Second operand 7 states. [2020-10-28 19:00:12,388 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 19:00:13,584 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 19:00:14,229 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 19:00:23,669 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-28 19:00:24,587 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-28 19:00:24,788 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-28 19:00:37,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:00:37,246 INFO L93 Difference]: Finished difference Result 202811 states and 286171 transitions. [2020-10-28 19:00:37,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 19:00:37,247 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 75 [2020-10-28 19:00:37,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:00:37,811 INFO L225 Difference]: With dead ends: 202811 [2020-10-28 19:00:37,811 INFO L226 Difference]: Without dead ends: 164536 [2020-10-28 19:00:37,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-10-28 19:00:38,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164536 states. [2020-10-28 19:00:48,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164536 to 66229. [2020-10-28 19:00:48,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66229 states. [2020-10-28 19:00:48,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66229 states to 66229 states and 93538 transitions. [2020-10-28 19:00:48,908 INFO L78 Accepts]: Start accepts. Automaton has 66229 states and 93538 transitions. Word has length 75 [2020-10-28 19:00:48,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:00:48,908 INFO L481 AbstractCegarLoop]: Abstraction has 66229 states and 93538 transitions. [2020-10-28 19:00:48,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 19:00:48,908 INFO L276 IsEmpty]: Start isEmpty. Operand 66229 states and 93538 transitions. [2020-10-28 19:00:48,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 19:00:48,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:00:48,916 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] [2020-10-28 19:00:48,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 19:00:48,916 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:00:48,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:00:48,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1510835740, now seen corresponding path program 1 times [2020-10-28 19:00:48,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:00:48,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951662568] [2020-10-28 19:00:48,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:00:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:48,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:48,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:49,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:49,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:49,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:49,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:49,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:50,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:50,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:50,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:50,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:50,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:50,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:51,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:52,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:52,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:53,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:53,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:53,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:53,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 19:00:53,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 19:00:53,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 19:00:53,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:53,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:53,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 19:00:53,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 19:00:53,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 19:00:53,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:54,138 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 19:00:54,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:00:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:00:54,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:00:54,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:00:54,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:00:54,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:00:54,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 19:00:54,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:00:54,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:00:54,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:00:54,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:00:54,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 19:00:54,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:00:54,191 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 19:00:54,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951662568] [2020-10-28 19:00:54,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:00:54,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:00:54,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328276150] [2020-10-28 19:00:54,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 19:00:54,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:00:54,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 19:00:54,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 19:00:54,193 INFO L87 Difference]: Start difference. First operand 66229 states and 93538 transitions. Second operand 6 states. [2020-10-28 19:00:54,405 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 19:00:55,838 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-28 19:01:14,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:01:14,610 INFO L93 Difference]: Finished difference Result 193314 states and 273951 transitions. [2020-10-28 19:01:14,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 19:01:14,611 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-28 19:01:14,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:01:14,830 INFO L225 Difference]: With dead ends: 193314 [2020-10-28 19:01:14,830 INFO L226 Difference]: Without dead ends: 127512 [2020-10-28 19:01:15,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-28 19:01:15,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127512 states. [2020-10-28 19:01:34,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127512 to 127269. [2020-10-28 19:01:34,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127269 states. [2020-10-28 19:01:34,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127269 states to 127269 states and 179396 transitions. [2020-10-28 19:01:34,650 INFO L78 Accepts]: Start accepts. Automaton has 127269 states and 179396 transitions. Word has length 75 [2020-10-28 19:01:34,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:01:34,651 INFO L481 AbstractCegarLoop]: Abstraction has 127269 states and 179396 transitions. [2020-10-28 19:01:34,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 19:01:34,651 INFO L276 IsEmpty]: Start isEmpty. Operand 127269 states and 179396 transitions. [2020-10-28 19:01:34,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-28 19:01:34,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:01:34,661 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] [2020-10-28 19:01:34,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 19:01:34,661 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:01:34,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:01:34,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1953881870, now seen corresponding path program 1 times [2020-10-28 19:01:34,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:01:34,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055932469] [2020-10-28 19:01:34,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:01:34,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:34,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:34,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:34,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:34,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:35,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:35,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:35,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:36,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:36,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:36,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:37,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:39,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:39,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 19:01:39,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 19:01:39,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 19:01:39,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:39,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:39,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 19:01:39,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:01:39,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-28 19:01:39,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:40,267 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-28 19:01:40,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:01:40,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:01:40,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:01:40,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:01:40,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:01:40,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:01:40,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 19:01:40,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:01:40,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:01:40,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:01:40,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:01:40,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:01:40,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:01:40,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:01:40,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055932469] [2020-10-28 19:01:40,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:01:40,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 19:01:40,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427467616] [2020-10-28 19:01:40,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 19:01:40,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:01:40,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 19:01:40,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 19:01:40,328 INFO L87 Difference]: Start difference. First operand 127269 states and 179396 transitions. Second operand 10 states. [2020-10-28 19:01:40,694 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-28 19:01:41,135 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-28 19:01:41,270 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-28 19:01:41,510 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-28 19:01:41,957 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49