/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:40:55,934 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:40:55,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:40:55,998 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:40:55,998 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:40:56,006 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:40:56,008 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:40:56,013 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:40:56,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:40:56,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:40:56,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:40:56,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:40:56,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:40:56,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:40:56,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:40:56,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:40:56,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:40:56,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:40:56,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:40:56,062 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:40:56,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:40:56,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:40:56,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:40:56,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:40:56,079 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:40:56,079 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:40:56,079 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:40:56,082 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:40:56,082 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:40:56,083 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:40:56,084 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:40:56,085 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:40:56,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:40:56,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:40:56,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:40:56,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:40:56,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:40:56,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:40:56,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:40:56,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:40:56,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:40:56,093 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 00:40:56,141 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:40:56,141 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:40:56,147 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:40:56,147 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:40:56,147 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:40:56,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:40:56,148 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:40:56,148 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:40:56,148 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:40:56,148 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:40:56,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:40:56,150 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:40:56,150 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:40:56,150 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:40:56,150 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:40:56,151 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:40:56,151 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:40:56,151 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:40:56,151 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:40:56,151 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:40:56,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:40:56,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:40:56,152 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:40:56,152 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:40:56,152 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:40:56,153 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:40:56,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:40:56,153 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:40:56,153 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:40:56,154 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:40:56,592 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:40:56,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:40:56,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:40:56,643 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:40:56,643 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:40:56,644 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-28 00:40:56,735 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aec1de3c6/2873d83a84be44ad99c303c031411352/FLAGb646f656c [2020-10-28 00:40:57,607 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:40:57,608 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-28 00:40:57,648 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aec1de3c6/2873d83a84be44ad99c303c031411352/FLAGb646f656c [2020-10-28 00:40:57,704 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/aec1de3c6/2873d83a84be44ad99c303c031411352 [2020-10-28 00:40:57,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:40:57,718 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:40:57,722 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:40:57,723 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:40:57,727 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:40:57,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:40:57" (1/1) ... [2020-10-28 00:40:57,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5033905d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:40:57, skipping insertion in model container [2020-10-28 00:40:57,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:40:57" (1/1) ... [2020-10-28 00:40:57,751 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:40:57,944 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:40:59,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:40:59,375 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:40:59,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:41:00,019 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:41:00,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:00 WrapperNode [2020-10-28 00:41:00,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:41:00,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:41:00,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:41:00,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:41:00,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:00" (1/1) ... [2020-10-28 00:41:00,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:00" (1/1) ... [2020-10-28 00:41:00,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:00" (1/1) ... [2020-10-28 00:41:00,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:00" (1/1) ... [2020-10-28 00:41:00,182 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:00" (1/1) ... [2020-10-28 00:41:00,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:00" (1/1) ... [2020-10-28 00:41:00,252 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:00" (1/1) ... [2020-10-28 00:41:00,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:41:00,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:41:00,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:41:00,275 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:41:00,276 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:41:00,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:41:00,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:41:00,355 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:41:00,355 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:41:00,356 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:41:00,356 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:41:00,356 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:41:00,356 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:41:00,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:41:00,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:41:00,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:41:00,357 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:41:00,357 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:41:00,357 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:41:00,358 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:41:00,358 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:41:00,358 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:41:00,358 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:41:00,359 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:41:00,359 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 00:41:00,359 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:41:00,359 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:41:00,359 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:41:00,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:41:00,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:41:00,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:41:00,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:41:00,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:41:00,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:41:04,596 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:41:04,596 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:41:04,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:41:04 BoogieIcfgContainer [2020-10-28 00:41:04,603 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:41:04,605 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:41:04,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:41:04,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:41:04,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:40:57" (1/3) ... [2020-10-28 00:41:04,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2358622e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:41:04, skipping insertion in model container [2020-10-28 00:41:04,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:41:00" (2/3) ... [2020-10-28 00:41:04,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2358622e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:41:04, skipping insertion in model container [2020-10-28 00:41:04,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:41:04" (3/3) ... [2020-10-28 00:41:04,612 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.3.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-28 00:41:04,624 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:41:04,630 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:41:04,644 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:41:04,679 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:41:04,679 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:41:04,680 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:41:04,680 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:41:04,680 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:41:04,680 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:41:04,680 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:41:04,680 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:41:04,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states. [2020-10-28 00:41:04,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2020-10-28 00:41:04,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:41:04,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:41:04,768 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:41:04,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:41:04,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1333769062, now seen corresponding path program 1 times [2020-10-28 00:41:04,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:41:04,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660834454] [2020-10-28 00:41:04,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:41:05,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:41:05,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:05,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:06,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:06,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:07,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:08,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:08,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:09,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:10,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:10,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:41:10,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 405 [2020-10-28 00:41:10,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 00:41:10,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5096 [2020-10-28 00:41:10,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:41:10,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:41:10,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 221 [2020-10-28 00:41:10,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 00:41:10,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:41:11,103 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2020-10-28 00:41:12,288 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-28 00:41:12,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:41:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:41:12,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:12,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:41:12,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:41:12,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:41:12,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-28 00:41:12,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:41:12,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:41:12,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:41:12,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:41:12,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:41:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:41:12,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660834454] [2020-10-28 00:41:12,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:41:12,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:41:12,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889815197] [2020-10-28 00:41:12,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:41:12,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:41:12,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:41:12,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:41:12,828 INFO L87 Difference]: Start difference. First operand 1553 states. Second operand 4 states. [2020-10-28 00:41:27,992 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-28 00:41:30,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:41:30,218 INFO L93 Difference]: Finished difference Result 3039 states and 5308 transitions. [2020-10-28 00:41:30,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:41:30,220 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 397 [2020-10-28 00:41:30,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:41:30,256 INFO L225 Difference]: With dead ends: 3039 [2020-10-28 00:41:30,256 INFO L226 Difference]: Without dead ends: 2322 [2020-10-28 00:41:30,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:41:30,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2020-10-28 00:41:30,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 2275. [2020-10-28 00:41:30,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2275 states. [2020-10-28 00:41:30,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 3790 transitions. [2020-10-28 00:41:30,478 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 3790 transitions. Word has length 397 [2020-10-28 00:41:30,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:41:30,480 INFO L481 AbstractCegarLoop]: Abstraction has 2275 states and 3790 transitions. [2020-10-28 00:41:30,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:41:30,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 3790 transitions. [2020-10-28 00:41:30,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2020-10-28 00:41:30,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:41:30,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:41:30,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:41:30,501 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:41:30,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:41:30,502 INFO L82 PathProgramCache]: Analyzing trace with hash -605220080, now seen corresponding path program 1 times [2020-10-28 00:41:30,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:41:30,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292356379] [2020-10-28 00:41:30,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:41:30,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:41:30,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:30,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:31,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:31,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:31,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:32,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:32,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:33,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:33,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:34,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:34,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:35,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:35,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:41:35,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 405 [2020-10-28 00:41:35,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:41:35,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-28 00:41:35,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:41:35,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:41:35,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 229 [2020-10-28 00:41:35,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 00:41:35,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:41:37,250 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-28 00:41:37,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:41:37,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:41:37,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:37,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:41:37,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:41:37,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:41:37,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 00:41:37,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:41:37,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:41:37,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:41:37,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:41:37,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:41:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:41:37,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292356379] [2020-10-28 00:41:37,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:41:37,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:41:37,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423772583] [2020-10-28 00:41:37,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:41:37,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:41:37,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:41:37,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:41:37,566 INFO L87 Difference]: Start difference. First operand 2275 states and 3790 transitions. Second operand 4 states. [2020-10-28 00:41:38,859 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 432 [2020-10-28 00:41:53,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:41:53,983 INFO L93 Difference]: Finished difference Result 4901 states and 8075 transitions. [2020-10-28 00:41:53,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:41:53,984 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 397 [2020-10-28 00:41:53,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:41:54,006 INFO L225 Difference]: With dead ends: 4901 [2020-10-28 00:41:54,006 INFO L226 Difference]: Without dead ends: 3720 [2020-10-28 00:41:54,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:41:54,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3720 states. [2020-10-28 00:41:54,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3720 to 3509. [2020-10-28 00:41:54,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3509 states. [2020-10-28 00:41:54,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3509 states to 3509 states and 5785 transitions. [2020-10-28 00:41:54,163 INFO L78 Accepts]: Start accepts. Automaton has 3509 states and 5785 transitions. Word has length 397 [2020-10-28 00:41:54,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:41:54,164 INFO L481 AbstractCegarLoop]: Abstraction has 3509 states and 5785 transitions. [2020-10-28 00:41:54,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:41:54,165 INFO L276 IsEmpty]: Start isEmpty. Operand 3509 states and 5785 transitions. [2020-10-28 00:41:54,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2020-10-28 00:41:54,178 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:41:54,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:41:54,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:41:54,179 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:41:54,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:41:54,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1491427363, now seen corresponding path program 1 times [2020-10-28 00:41:54,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:41:54,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443738486] [2020-10-28 00:41:54,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:41:54,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:41:54,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:54,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:54,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:55,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:55,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:55,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:56,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:56,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:57,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:57,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:58,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:58,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:58,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:59,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:41:59,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 405 [2020-10-28 00:41:59,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:41:59,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 00:41:59,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:41:59,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:41:59,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 237 [2020-10-28 00:41:59,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 00:41:59,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:42:00,726 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-28 00:42:00,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:42:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:42:00,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:00,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:42:00,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:42:00,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:42:00,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-28 00:42:00,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:42:00,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:42:00,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:42:00,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:42:00,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:42:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:42:01,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443738486] [2020-10-28 00:42:01,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:42:01,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:42:01,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178030892] [2020-10-28 00:42:01,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:42:01,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:42:01,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:42:01,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:42:01,109 INFO L87 Difference]: Start difference. First operand 3509 states and 5785 transitions. Second operand 4 states. [2020-10-28 00:42:02,405 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 432 [2020-10-28 00:42:16,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:42:16,895 INFO L93 Difference]: Finished difference Result 7979 states and 13045 transitions. [2020-10-28 00:42:16,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:42:16,900 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 397 [2020-10-28 00:42:16,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:42:16,930 INFO L225 Difference]: With dead ends: 7979 [2020-10-28 00:42:16,930 INFO L226 Difference]: Without dead ends: 5996 [2020-10-28 00:42:16,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:42:16,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5996 states. [2020-10-28 00:42:17,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5996 to 5681. [2020-10-28 00:42:17,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5681 states. [2020-10-28 00:42:17,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5681 states to 5681 states and 9277 transitions. [2020-10-28 00:42:17,181 INFO L78 Accepts]: Start accepts. Automaton has 5681 states and 9277 transitions. Word has length 397 [2020-10-28 00:42:17,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:42:17,182 INFO L481 AbstractCegarLoop]: Abstraction has 5681 states and 9277 transitions. [2020-10-28 00:42:17,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:42:17,182 INFO L276 IsEmpty]: Start isEmpty. Operand 5681 states and 9277 transitions. [2020-10-28 00:42:17,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2020-10-28 00:42:17,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:42:17,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:42:17,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:42:17,204 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:42:17,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:42:17,205 INFO L82 PathProgramCache]: Analyzing trace with hash 361995863, now seen corresponding path program 1 times [2020-10-28 00:42:17,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:42:17,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996779759] [2020-10-28 00:42:17,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:42:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:42:17,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:17,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:17,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:17,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:18,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:18,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:18,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:19,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:19,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:20,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:20,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:21,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:21,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:22,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:42:22,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 405 [2020-10-28 00:42:22,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:42:22,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 00:42:22,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:42:22,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:42:22,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 191 [2020-10-28 00:42:22,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 00:42:22,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:42:23,658 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-28 00:42:23,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:42:23,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:42:23,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:23,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:42:23,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:42:23,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:42:23,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 00:42:23,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:42:23,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:42:23,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:42:23,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:42:23,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:42:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:42:23,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996779759] [2020-10-28 00:42:23,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:42:23,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:42:23,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657965720] [2020-10-28 00:42:23,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:42:23,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:42:23,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:42:23,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:42:23,922 INFO L87 Difference]: Start difference. First operand 5681 states and 9277 transitions. Second operand 4 states. [2020-10-28 00:42:25,247 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 428 [2020-10-28 00:42:39,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:42:39,086 INFO L93 Difference]: Finished difference Result 8847 states and 14457 transitions. [2020-10-28 00:42:39,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:42:39,087 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 397 [2020-10-28 00:42:39,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:42:39,109 INFO L225 Difference]: With dead ends: 8847 [2020-10-28 00:42:39,110 INFO L226 Difference]: Without dead ends: 5116 [2020-10-28 00:42:39,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:42:39,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5116 states. [2020-10-28 00:42:39,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5116 to 5113. [2020-10-28 00:42:39,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5113 states. [2020-10-28 00:42:39,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5113 states to 5113 states and 8373 transitions. [2020-10-28 00:42:39,318 INFO L78 Accepts]: Start accepts. Automaton has 5113 states and 8373 transitions. Word has length 397 [2020-10-28 00:42:39,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:42:39,318 INFO L481 AbstractCegarLoop]: Abstraction has 5113 states and 8373 transitions. [2020-10-28 00:42:39,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:42:39,319 INFO L276 IsEmpty]: Start isEmpty. Operand 5113 states and 8373 transitions. [2020-10-28 00:42:39,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2020-10-28 00:42:39,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:42:39,336 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:42:39,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:42:39,336 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:42:39,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:42:39,337 INFO L82 PathProgramCache]: Analyzing trace with hash -2006041589, now seen corresponding path program 1 times [2020-10-28 00:42:39,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:42:39,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861211655] [2020-10-28 00:42:39,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:42:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:42:39,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:39,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:39,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:40,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:40,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:41,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:41,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:41,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:42,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:42,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:43,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:43,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:44,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:44,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:42:44,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 405 [2020-10-28 00:42:44,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:42:44,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 00:42:44,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:42:44,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:42:44,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 259 [2020-10-28 00:42:44,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 00:42:44,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:42:45,927 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-28 00:42:45,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:42:45,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:42:45,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:42:45,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:42:45,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:42:45,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:42:45,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 00:42:45,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:42:45,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:42:45,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:42:45,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:42:45,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:42:46,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:42:46,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861211655] [2020-10-28 00:42:46,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:42:46,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:42:46,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118127479] [2020-10-28 00:42:46,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:42:46,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:42:46,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:42:46,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:42:46,111 INFO L87 Difference]: Start difference. First operand 5113 states and 8373 transitions. Second operand 4 states. [2020-10-28 00:43:00,860 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-28 00:43:02,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:43:02,574 INFO L93 Difference]: Finished difference Result 13063 states and 21297 transitions. [2020-10-28 00:43:02,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:43:02,575 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 397 [2020-10-28 00:43:02,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:43:02,612 INFO L225 Difference]: With dead ends: 13063 [2020-10-28 00:43:02,612 INFO L226 Difference]: Without dead ends: 8908 [2020-10-28 00:43:02,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:43:02,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8908 states. [2020-10-28 00:43:02,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8908 to 8593. [2020-10-28 00:43:02,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8593 states. [2020-10-28 00:43:02,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8593 states to 8593 states and 13929 transitions. [2020-10-28 00:43:02,999 INFO L78 Accepts]: Start accepts. Automaton has 8593 states and 13929 transitions. Word has length 397 [2020-10-28 00:43:03,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:43:03,000 INFO L481 AbstractCegarLoop]: Abstraction has 8593 states and 13929 transitions. [2020-10-28 00:43:03,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:43:03,001 INFO L276 IsEmpty]: Start isEmpty. Operand 8593 states and 13929 transitions. [2020-10-28 00:43:03,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2020-10-28 00:43:03,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:43:03,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:43:03,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:43:03,025 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:43:03,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:43:03,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1943630782, now seen corresponding path program 1 times [2020-10-28 00:43:03,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:43:03,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842006852] [2020-10-28 00:43:03,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:43:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:43:03,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:03,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:03,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:03,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:03,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:04,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:04,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:04,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:04,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:05,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:05,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:05,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:06,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:06,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:08,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:43:08,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 405 [2020-10-28 00:43:08,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 00:43:08,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5103 [2020-10-28 00:43:08,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:43:08,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:43:08,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 190 [2020-10-28 00:43:08,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 00:43:08,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:43:09,643 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-28 00:43:09,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:43:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:43:09,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:09,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:43:09,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:43:09,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:43:09,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 00:43:09,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:43:09,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:43:09,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:43:09,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:43:09,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:43:09,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:43:09,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842006852] [2020-10-28 00:43:09,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:43:09,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:43:09,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975727998] [2020-10-28 00:43:09,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:43:09,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:43:09,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:43:09,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:43:09,812 INFO L87 Difference]: Start difference. First operand 8593 states and 13929 transitions. Second operand 4 states. [2020-10-28 00:43:11,138 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 428 [2020-10-28 00:43:24,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:43:24,089 INFO L93 Difference]: Finished difference Result 14375 states and 23337 transitions. [2020-10-28 00:43:24,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:43:24,090 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 397 [2020-10-28 00:43:24,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:43:24,108 INFO L225 Difference]: With dead ends: 14375 [2020-10-28 00:43:24,108 INFO L226 Difference]: Without dead ends: 8068 [2020-10-28 00:43:24,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:43:24,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8068 states. [2020-10-28 00:43:24,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8068 to 8065. [2020-10-28 00:43:24,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8065 states. [2020-10-28 00:43:24,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8065 states to 8065 states and 13101 transitions. [2020-10-28 00:43:24,455 INFO L78 Accepts]: Start accepts. Automaton has 8065 states and 13101 transitions. Word has length 397 [2020-10-28 00:43:24,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:43:24,456 INFO L481 AbstractCegarLoop]: Abstraction has 8065 states and 13101 transitions. [2020-10-28 00:43:24,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:43:24,456 INFO L276 IsEmpty]: Start isEmpty. Operand 8065 states and 13101 transitions. [2020-10-28 00:43:24,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2020-10-28 00:43:24,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:43:24,476 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:43:24,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:43:24,476 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:43:24,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:43:24,477 INFO L82 PathProgramCache]: Analyzing trace with hash -2081947295, now seen corresponding path program 1 times [2020-10-28 00:43:24,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:43:24,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448795077] [2020-10-28 00:43:24,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:43:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:43:24,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:24,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:24,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:25,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:25,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:25,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:25,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:26,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:26,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:26,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:26,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:27,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:27,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:29,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:43:29,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 405 [2020-10-28 00:43:29,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:43:29,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5069 [2020-10-28 00:43:29,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:43:29,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:43:29,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 313 [2020-10-28 00:43:29,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 00:43:29,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:43:31,016 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-28 00:43:31,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:43:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:43:31,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:31,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:43:31,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:43:31,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:43:31,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 00:43:31,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:43:31,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:43:31,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:43:31,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:43:31,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:43:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:43:31,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448795077] [2020-10-28 00:43:31,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:43:31,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:43:31,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743391561] [2020-10-28 00:43:31,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:43:31,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:43:31,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:43:31,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:43:31,317 INFO L87 Difference]: Start difference. First operand 8065 states and 13101 transitions. Second operand 4 states. [2020-10-28 00:43:32,660 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 432 [2020-10-28 00:43:47,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:43:47,835 INFO L93 Difference]: Finished difference Result 14579 states and 23718 transitions. [2020-10-28 00:43:47,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:43:47,836 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 397 [2020-10-28 00:43:47,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:43:47,856 INFO L225 Difference]: With dead ends: 14579 [2020-10-28 00:43:47,856 INFO L226 Difference]: Without dead ends: 8068 [2020-10-28 00:43:47,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:43:47,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8068 states. [2020-10-28 00:43:48,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8068 to 8065. [2020-10-28 00:43:48,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8065 states. [2020-10-28 00:43:48,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8065 states to 8065 states and 13075 transitions. [2020-10-28 00:43:48,242 INFO L78 Accepts]: Start accepts. Automaton has 8065 states and 13075 transitions. Word has length 397 [2020-10-28 00:43:48,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:43:48,243 INFO L481 AbstractCegarLoop]: Abstraction has 8065 states and 13075 transitions. [2020-10-28 00:43:48,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:43:48,244 INFO L276 IsEmpty]: Start isEmpty. Operand 8065 states and 13075 transitions. [2020-10-28 00:43:48,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2020-10-28 00:43:48,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:43:48,262 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:43:48,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:43:48,262 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:43:48,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:43:48,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1414180921, now seen corresponding path program 1 times [2020-10-28 00:43:48,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:43:48,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656923737] [2020-10-28 00:43:48,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:43:48,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:43:48,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:48,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:48,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:49,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:49,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:49,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:49,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:50,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:50,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:50,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:50,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:50,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:50,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:53,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:43:53,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 405 [2020-10-28 00:43:53,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 00:43:53,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 00:43:53,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:43:53,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:43:53,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 187 [2020-10-28 00:43:53,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 00:43:53,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:43:54,766 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-28 00:43:54,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:43:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:43:54,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:43:54,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:43:54,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:43:54,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:43:54,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 00:43:54,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:43:54,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:43:54,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:43:54,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:43:54,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:43:54,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:43:54,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656923737] [2020-10-28 00:43:54,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:43:54,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:43:54,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264439449] [2020-10-28 00:43:54,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:43:54,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:43:54,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:43:54,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:43:54,922 INFO L87 Difference]: Start difference. First operand 8065 states and 13075 transitions. Second operand 4 states. [2020-10-28 00:43:56,486 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification that was a NOOP. DAG size: 428 [2020-10-28 00:44:08,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:44:08,472 INFO L93 Difference]: Finished difference Result 10343 states and 16927 transitions. [2020-10-28 00:44:08,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:44:08,473 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 397 [2020-10-28 00:44:08,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:44:08,485 INFO L225 Difference]: With dead ends: 10343 [2020-10-28 00:44:08,485 INFO L226 Difference]: Without dead ends: 5450 [2020-10-28 00:44:08,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:44:08,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5450 states. [2020-10-28 00:44:08,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5450 to 5447. [2020-10-28 00:44:08,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5447 states. [2020-10-28 00:44:08,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5447 states to 5447 states and 8953 transitions. [2020-10-28 00:44:08,865 INFO L78 Accepts]: Start accepts. Automaton has 5447 states and 8953 transitions. Word has length 397 [2020-10-28 00:44:08,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:44:08,866 INFO L481 AbstractCegarLoop]: Abstraction has 5447 states and 8953 transitions. [2020-10-28 00:44:08,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:44:08,866 INFO L276 IsEmpty]: Start isEmpty. Operand 5447 states and 8953 transitions. [2020-10-28 00:44:08,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2020-10-28 00:44:08,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:44:08,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:44:08,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:44:08,876 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:44:08,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:44:08,877 INFO L82 PathProgramCache]: Analyzing trace with hash -93133167, now seen corresponding path program 1 times [2020-10-28 00:44:08,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:44:08,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719303004] [2020-10-28 00:44:08,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:44:08,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:44:09,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:09,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:09,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:10,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:10,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:10,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:10,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:11,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:11,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:11,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:14,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:44:14,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 405 [2020-10-28 00:44:14,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:44:14,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-28 00:44:14,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:44:14,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:44:14,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 340 [2020-10-28 00:44:14,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 00:44:14,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:44:15,546 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-28 00:44:15,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:44:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:44:15,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:15,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:44:15,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:44:15,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:44:15,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 00:44:15,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:44:15,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:44:15,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:44:15,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:44:15,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:44:15,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:44:15,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719303004] [2020-10-28 00:44:15,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:44:15,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:44:15,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317509549] [2020-10-28 00:44:15,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:44:15,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:44:15,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:44:15,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:44:15,691 INFO L87 Difference]: Start difference. First operand 5447 states and 8953 transitions. Second operand 4 states. [2020-10-28 00:44:17,021 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 426 [2020-10-28 00:44:31,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:44:31,051 INFO L93 Difference]: Finished difference Result 8729 states and 14501 transitions. [2020-10-28 00:44:31,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:44:31,052 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 397 [2020-10-28 00:44:31,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:44:31,064 INFO L225 Difference]: With dead ends: 8729 [2020-10-28 00:44:31,065 INFO L226 Difference]: Without dead ends: 6454 [2020-10-28 00:44:31,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:44:31,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6454 states. [2020-10-28 00:44:31,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6454 to 6447. [2020-10-28 00:44:31,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6447 states. [2020-10-28 00:44:31,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6447 states to 6447 states and 10637 transitions. [2020-10-28 00:44:31,404 INFO L78 Accepts]: Start accepts. Automaton has 6447 states and 10637 transitions. Word has length 397 [2020-10-28 00:44:31,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:44:31,405 INFO L481 AbstractCegarLoop]: Abstraction has 6447 states and 10637 transitions. [2020-10-28 00:44:31,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:44:31,405 INFO L276 IsEmpty]: Start isEmpty. Operand 6447 states and 10637 transitions. [2020-10-28 00:44:31,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2020-10-28 00:44:31,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:44:31,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:44:31,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:44:31,417 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:44:31,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:44:31,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1034754828, now seen corresponding path program 1 times [2020-10-28 00:44:31,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:44:31,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960163518] [2020-10-28 00:44:31,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:44:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:44:31,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:31,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:31,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:32,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:32,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:32,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:32,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:32,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:33,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:33,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:33,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:33,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:44:36,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:44:36,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 405 [2020-10-28 00:44:36,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:44:36,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5058 [2020-10-28 00:44:36,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:44:36,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:44:36,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 246 [2020-10-28 00:44:36,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 153 [2020-10-28 00:44:36,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0