./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e88e261bdd8209c6645351b9246697a266f2a89be3660180d29cb5cfb2f2528f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 12:18:58,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 12:18:58,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 12:18:58,781 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 12:18:58,783 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 12:18:58,784 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 12:18:58,785 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 12:18:58,789 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 12:18:58,790 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 12:18:58,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 12:18:58,792 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 12:18:58,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 12:18:58,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 12:18:58,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 12:18:58,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 12:18:58,799 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 12:18:58,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 12:18:58,803 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 12:18:58,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 12:18:58,820 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 12:18:58,821 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 12:18:58,823 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 12:18:58,824 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 12:18:58,825 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 12:18:58,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 12:18:58,829 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 12:18:58,829 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 12:18:58,830 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 12:18:58,831 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 12:18:58,831 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 12:18:58,832 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 12:18:58,832 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 12:18:58,833 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 12:18:58,833 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 12:18:58,834 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 12:18:58,834 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 12:18:58,835 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 12:18:58,835 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 12:18:58,835 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 12:18:58,836 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 12:18:58,837 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 12:18:58,838 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 12:18:58,861 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 12:18:58,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 12:18:58,862 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 12:18:58,862 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 12:18:58,863 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 12:18:58,863 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 12:18:58,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 12:18:58,864 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 12:18:58,864 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 12:18:58,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 12:18:58,865 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 12:18:58,866 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 12:18:58,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 12:18:58,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 12:18:58,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 12:18:58,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 12:18:58,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 12:18:58,866 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 12:18:58,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 12:18:58,867 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 12:18:58,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 12:18:58,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 12:18:58,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 12:18:58,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 12:18:58,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:18:58,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 12:18:58,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 12:18:58,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 12:18:58,868 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 12:18:58,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 12:18:58,868 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 12:18:58,868 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 12:18:58,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 12:18:58,869 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 12:18:58,869 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e88e261bdd8209c6645351b9246697a266f2a89be3660180d29cb5cfb2f2528f [2021-12-22 12:18:59,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 12:18:59,061 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 12:18:59,063 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 12:18:59,064 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 12:18:59,065 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 12:18:59,066 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2021-12-22 12:18:59,114 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/311d9b231/8e8834478782438681c2d13eb719e7d1/FLAGeb0f84ed2 [2021-12-22 12:18:59,570 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 12:18:59,587 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2021-12-22 12:18:59,606 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/311d9b231/8e8834478782438681c2d13eb719e7d1/FLAGeb0f84ed2 [2021-12-22 12:18:59,912 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/311d9b231/8e8834478782438681c2d13eb719e7d1 [2021-12-22 12:18:59,914 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 12:18:59,915 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 12:18:59,916 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 12:18:59,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 12:18:59,927 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 12:18:59,928 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:18:59" (1/1) ... [2021-12-22 12:18:59,929 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a155273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:18:59, skipping insertion in model container [2021-12-22 12:18:59,929 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 12:18:59" (1/1) ... [2021-12-22 12:18:59,934 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 12:18:59,994 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 12:19:00,333 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[22673,22686] [2021-12-22 12:19:00,452 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:19:00,466 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 12:19:00,542 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c[22673,22686] [2021-12-22 12:19:00,580 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 12:19:00,593 INFO L208 MainTranslator]: Completed translation [2021-12-22 12:19:00,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:19:00 WrapperNode [2021-12-22 12:19:00,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 12:19:00,595 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 12:19:00,595 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 12:19:00,595 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 12:19:00,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:19:00" (1/1) ... [2021-12-22 12:19:00,634 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:19:00" (1/1) ... [2021-12-22 12:19:00,684 INFO L137 Inliner]: procedures = 24, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 2818 [2021-12-22 12:19:00,685 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 12:19:00,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 12:19:00,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 12:19:00,686 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 12:19:00,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:19:00" (1/1) ... [2021-12-22 12:19:00,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:19:00" (1/1) ... [2021-12-22 12:19:00,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:19:00" (1/1) ... [2021-12-22 12:19:00,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:19:00" (1/1) ... [2021-12-22 12:19:00,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:19:00" (1/1) ... [2021-12-22 12:19:00,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:19:00" (1/1) ... [2021-12-22 12:19:00,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:19:00" (1/1) ... [2021-12-22 12:19:00,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 12:19:00,743 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 12:19:00,743 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 12:19:00,743 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 12:19:00,744 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:19:00" (1/1) ... [2021-12-22 12:19:00,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 12:19:00,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 12:19:00,792 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 12:19:00,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 12:19:00,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 12:19:00,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 12:19:00,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 12:19:00,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 12:19:01,045 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 12:19:01,047 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 12:19:02,196 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 12:19:02,207 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 12:19:02,207 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 12:19:02,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:19:02 BoogieIcfgContainer [2021-12-22 12:19:02,209 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 12:19:02,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 12:19:02,211 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 12:19:02,214 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 12:19:02,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 12:18:59" (1/3) ... [2021-12-22 12:19:02,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17dae1e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:19:02, skipping insertion in model container [2021-12-22 12:19:02,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 12:19:00" (2/3) ... [2021-12-22 12:19:02,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17dae1e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 12:19:02, skipping insertion in model container [2021-12-22 12:19:02,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 12:19:02" (3/3) ... [2021-12-22 12:19:02,216 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2021-12-22 12:19:02,220 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 12:19:02,220 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 12:19:02,267 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 12:19:02,272 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 12:19:02,272 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 12:19:02,292 INFO L276 IsEmpty]: Start isEmpty. Operand has 750 states, 748 states have (on average 1.8328877005347595) internal successors, (1371), 749 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:02,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-12-22 12:19:02,322 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:19:02,323 INFO L514 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] [2021-12-22 12:19:02,324 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:19:02,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:19:02,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1759621140, now seen corresponding path program 1 times [2021-12-22 12:19:02,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:19:02,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536996775] [2021-12-22 12:19:02,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:19:02,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:19:02,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:19:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:19:02,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:19:02,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536996775] [2021-12-22 12:19:02,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536996775] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:19:02,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:19:02,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:19:02,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974578541] [2021-12-22 12:19:02,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:19:02,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:19:02,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:19:02,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:19:02,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:19:02,847 INFO L87 Difference]: Start difference. First operand has 750 states, 748 states have (on average 1.8328877005347595) internal successors, (1371), 749 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:02,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:19:02,969 INFO L93 Difference]: Finished difference Result 1180 states and 2099 transitions. [2021-12-22 12:19:02,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:19:02,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 193 [2021-12-22 12:19:02,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:19:02,990 INFO L225 Difference]: With dead ends: 1180 [2021-12-22 12:19:02,991 INFO L226 Difference]: Without dead ends: 952 [2021-12-22 12:19:02,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:19:02,999 INFO L933 BasicCegarLoop]: 1367 mSDtfsCounter, 372 mSDsluCounter, 1293 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 2660 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:19:03,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 2660 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:19:03,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-12-22 12:19:03,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 950. [2021-12-22 12:19:03,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 949 states have (on average 1.7513171759747101) internal successors, (1662), 949 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:03,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1662 transitions. [2021-12-22 12:19:03,092 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 1662 transitions. Word has length 193 [2021-12-22 12:19:03,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:19:03,093 INFO L470 AbstractCegarLoop]: Abstraction has 950 states and 1662 transitions. [2021-12-22 12:19:03,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:03,094 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 1662 transitions. [2021-12-22 12:19:03,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-22 12:19:03,103 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:19:03,105 INFO L514 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] [2021-12-22 12:19:03,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 12:19:03,105 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:19:03,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:19:03,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1458857433, now seen corresponding path program 1 times [2021-12-22 12:19:03,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:19:03,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589660808] [2021-12-22 12:19:03,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:19:03,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:19:03,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:19:03,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:19:03,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:19:03,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589660808] [2021-12-22 12:19:03,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589660808] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:19:03,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:19:03,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:19:03,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146271273] [2021-12-22 12:19:03,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:19:03,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:19:03,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:19:03,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:19:03,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:19:03,268 INFO L87 Difference]: Start difference. First operand 950 states and 1662 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:03,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:19:03,304 INFO L93 Difference]: Finished difference Result 1770 states and 3046 transitions. [2021-12-22 12:19:03,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:19:03,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 197 [2021-12-22 12:19:03,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:19:03,313 INFO L225 Difference]: With dead ends: 1770 [2021-12-22 12:19:03,314 INFO L226 Difference]: Without dead ends: 1348 [2021-12-22 12:19:03,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:19:03,321 INFO L933 BasicCegarLoop]: 1319 mSDtfsCounter, 339 mSDsluCounter, 1284 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 2603 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:19:03,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 2603 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:19:03,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2021-12-22 12:19:03,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 1346. [2021-12-22 12:19:03,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1346 states, 1345 states have (on average 1.7315985130111524) internal successors, (2329), 1345 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:03,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1346 states to 1346 states and 2329 transitions. [2021-12-22 12:19:03,392 INFO L78 Accepts]: Start accepts. Automaton has 1346 states and 2329 transitions. Word has length 197 [2021-12-22 12:19:03,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:19:03,394 INFO L470 AbstractCegarLoop]: Abstraction has 1346 states and 2329 transitions. [2021-12-22 12:19:03,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:03,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1346 states and 2329 transitions. [2021-12-22 12:19:03,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-22 12:19:03,399 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:19:03,400 INFO L514 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] [2021-12-22 12:19:03,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 12:19:03,402 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:19:03,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:19:03,403 INFO L85 PathProgramCache]: Analyzing trace with hash -308666722, now seen corresponding path program 1 times [2021-12-22 12:19:03,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:19:03,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308482780] [2021-12-22 12:19:03,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:19:03,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:19:03,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:19:03,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:19:03,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:19:03,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308482780] [2021-12-22 12:19:03,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308482780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:19:03,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:19:03,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:19:03,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689241573] [2021-12-22 12:19:03,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:19:03,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:19:03,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:19:03,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:19:03,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:19:03,544 INFO L87 Difference]: Start difference. First operand 1346 states and 2329 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:03,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:19:03,593 INFO L93 Difference]: Finished difference Result 2934 states and 5003 transitions. [2021-12-22 12:19:03,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:19:03,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2021-12-22 12:19:03,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:19:03,601 INFO L225 Difference]: With dead ends: 2934 [2021-12-22 12:19:03,601 INFO L226 Difference]: Without dead ends: 2116 [2021-12-22 12:19:03,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:19:03,603 INFO L933 BasicCegarLoop]: 1319 mSDtfsCounter, 331 mSDsluCounter, 1285 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 2604 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:19:03,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 2604 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:19:03,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2021-12-22 12:19:03,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 2114. [2021-12-22 12:19:03,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 2113 states have (on average 1.7117841930903928) internal successors, (3617), 2113 states have internal predecessors, (3617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:03,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 3617 transitions. [2021-12-22 12:19:03,676 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 3617 transitions. Word has length 201 [2021-12-22 12:19:03,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:19:03,676 INFO L470 AbstractCegarLoop]: Abstraction has 2114 states and 3617 transitions. [2021-12-22 12:19:03,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:03,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 3617 transitions. [2021-12-22 12:19:03,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-22 12:19:03,679 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:19:03,679 INFO L514 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] [2021-12-22 12:19:03,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 12:19:03,680 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:19:03,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:19:03,680 INFO L85 PathProgramCache]: Analyzing trace with hash 422688099, now seen corresponding path program 1 times [2021-12-22 12:19:03,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:19:03,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619670564] [2021-12-22 12:19:03,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:19:03,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:19:03,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:19:03,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:19:03,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:19:03,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619670564] [2021-12-22 12:19:03,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619670564] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:19:03,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:19:03,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:19:03,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681843693] [2021-12-22 12:19:03,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:19:03,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:19:03,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:19:03,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:19:03,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:19:03,763 INFO L87 Difference]: Start difference. First operand 2114 states and 3617 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:03,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:19:03,845 INFO L93 Difference]: Finished difference Result 5190 states and 8779 transitions. [2021-12-22 12:19:03,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:19:03,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2021-12-22 12:19:03,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:19:03,873 INFO L225 Difference]: With dead ends: 5190 [2021-12-22 12:19:03,874 INFO L226 Difference]: Without dead ends: 3604 [2021-12-22 12:19:03,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:19:03,876 INFO L933 BasicCegarLoop]: 1319 mSDtfsCounter, 323 mSDsluCounter, 1286 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 2605 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:19:03,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 2605 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:19:03,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3604 states. [2021-12-22 12:19:03,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3604 to 3602. [2021-12-22 12:19:03,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3602 states, 3601 states have (on average 1.6942515967786727) internal successors, (6101), 3601 states have internal predecessors, (6101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:03,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3602 states to 3602 states and 6101 transitions. [2021-12-22 12:19:03,972 INFO L78 Accepts]: Start accepts. Automaton has 3602 states and 6101 transitions. Word has length 205 [2021-12-22 12:19:03,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:19:03,972 INFO L470 AbstractCegarLoop]: Abstraction has 3602 states and 6101 transitions. [2021-12-22 12:19:03,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:03,973 INFO L276 IsEmpty]: Start isEmpty. Operand 3602 states and 6101 transitions. [2021-12-22 12:19:03,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-12-22 12:19:03,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:19:03,976 INFO L514 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] [2021-12-22 12:19:03,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 12:19:03,976 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:19:03,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:19:03,977 INFO L85 PathProgramCache]: Analyzing trace with hash 245335336, now seen corresponding path program 1 times [2021-12-22 12:19:03,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:19:03,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308737992] [2021-12-22 12:19:03,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:19:03,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:19:04,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:19:04,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:19:04,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:19:04,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308737992] [2021-12-22 12:19:04,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308737992] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:19:04,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:19:04,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:19:04,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855347335] [2021-12-22 12:19:04,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:19:04,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:19:04,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:19:04,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:19:04,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:19:04,072 INFO L87 Difference]: Start difference. First operand 3602 states and 6101 transitions. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:04,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:19:04,244 INFO L93 Difference]: Finished difference Result 9558 states and 16055 transitions. [2021-12-22 12:19:04,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:19:04,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 209 [2021-12-22 12:19:04,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:19:04,268 INFO L225 Difference]: With dead ends: 9558 [2021-12-22 12:19:04,268 INFO L226 Difference]: Without dead ends: 6484 [2021-12-22 12:19:04,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:19:04,274 INFO L933 BasicCegarLoop]: 1319 mSDtfsCounter, 315 mSDsluCounter, 1287 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 2606 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:19:04,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 2606 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:19:04,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6484 states. [2021-12-22 12:19:04,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6484 to 6482. [2021-12-22 12:19:04,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6482 states, 6481 states have (on average 1.6795247646968061) internal successors, (10885), 6481 states have internal predecessors, (10885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:04,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6482 states to 6482 states and 10885 transitions. [2021-12-22 12:19:04,514 INFO L78 Accepts]: Start accepts. Automaton has 6482 states and 10885 transitions. Word has length 209 [2021-12-22 12:19:04,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:19:04,514 INFO L470 AbstractCegarLoop]: Abstraction has 6482 states and 10885 transitions. [2021-12-22 12:19:04,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:04,514 INFO L276 IsEmpty]: Start isEmpty. Operand 6482 states and 10885 transitions. [2021-12-22 12:19:04,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-12-22 12:19:04,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:19:04,518 INFO L514 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] [2021-12-22 12:19:04,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 12:19:04,519 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:19:04,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:19:04,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1489856749, now seen corresponding path program 1 times [2021-12-22 12:19:04,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:19:04,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505253205] [2021-12-22 12:19:04,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:19:04,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:19:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:19:04,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:19:04,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:19:04,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505253205] [2021-12-22 12:19:04,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505253205] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:19:04,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:19:04,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 12:19:04,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499971269] [2021-12-22 12:19:04,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:19:04,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 12:19:04,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:19:04,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 12:19:04,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 12:19:04,611 INFO L87 Difference]: Start difference. First operand 6482 states and 10885 transitions. Second operand has 7 states, 7 states have (on average 30.428571428571427) internal successors, (213), 7 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:06,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:19:06,143 INFO L93 Difference]: Finished difference Result 40006 states and 67167 transitions. [2021-12-22 12:19:06,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 12:19:06,144 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 30.428571428571427) internal successors, (213), 7 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 213 [2021-12-22 12:19:06,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:19:06,258 INFO L225 Difference]: With dead ends: 40006 [2021-12-22 12:19:06,258 INFO L226 Difference]: Without dead ends: 34052 [2021-12-22 12:19:06,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-22 12:19:06,279 INFO L933 BasicCegarLoop]: 1309 mSDtfsCounter, 4630 mSDsluCounter, 10022 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4630 SdHoareTripleChecker+Valid, 11331 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 12:19:06,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4630 Valid, 11331 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 12:19:06,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34052 states. [2021-12-22 12:19:07,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34052 to 12219. [2021-12-22 12:19:07,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12219 states, 12218 states have (on average 1.6736781797348175) internal successors, (20449), 12218 states have internal predecessors, (20449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:07,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12219 states to 12219 states and 20449 transitions. [2021-12-22 12:19:07,296 INFO L78 Accepts]: Start accepts. Automaton has 12219 states and 20449 transitions. Word has length 213 [2021-12-22 12:19:07,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:19:07,296 INFO L470 AbstractCegarLoop]: Abstraction has 12219 states and 20449 transitions. [2021-12-22 12:19:07,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 30.428571428571427) internal successors, (213), 7 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:07,311 INFO L276 IsEmpty]: Start isEmpty. Operand 12219 states and 20449 transitions. [2021-12-22 12:19:07,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-12-22 12:19:07,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:19:07,318 INFO L514 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] [2021-12-22 12:19:07,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 12:19:07,319 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:19:07,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:19:07,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1130700822, now seen corresponding path program 1 times [2021-12-22 12:19:07,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:19:07,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722307207] [2021-12-22 12:19:07,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:19:07,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:19:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:19:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:19:07,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:19:07,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722307207] [2021-12-22 12:19:07,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722307207] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:19:07,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:19:07,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 12:19:07,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262011588] [2021-12-22 12:19:07,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:19:07,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 12:19:07,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:19:07,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 12:19:07,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 12:19:07,408 INFO L87 Difference]: Start difference. First operand 12219 states and 20449 transitions. Second operand has 4 states, 4 states have (on average 53.5) internal successors, (214), 4 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:08,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:19:08,671 INFO L93 Difference]: Finished difference Result 35928 states and 60192 transitions. [2021-12-22 12:19:08,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 12:19:08,671 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 4 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 214 [2021-12-22 12:19:08,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:19:08,725 INFO L225 Difference]: With dead ends: 35928 [2021-12-22 12:19:08,725 INFO L226 Difference]: Without dead ends: 24237 [2021-12-22 12:19:08,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:19:08,752 INFO L933 BasicCegarLoop]: 1312 mSDtfsCounter, 1087 mSDsluCounter, 2936 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1087 SdHoareTripleChecker+Valid, 4248 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:19:08,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1087 Valid, 4248 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:19:08,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24237 states. [2021-12-22 12:19:09,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24237 to 18195. [2021-12-22 12:19:09,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18195 states, 18194 states have (on average 1.6733538529185445) internal successors, (30445), 18194 states have internal predecessors, (30445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:09,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18195 states to 18195 states and 30445 transitions. [2021-12-22 12:19:09,712 INFO L78 Accepts]: Start accepts. Automaton has 18195 states and 30445 transitions. Word has length 214 [2021-12-22 12:19:09,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:19:09,713 INFO L470 AbstractCegarLoop]: Abstraction has 18195 states and 30445 transitions. [2021-12-22 12:19:09,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.5) internal successors, (214), 4 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:09,713 INFO L276 IsEmpty]: Start isEmpty. Operand 18195 states and 30445 transitions. [2021-12-22 12:19:09,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-22 12:19:09,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:19:09,723 INFO L514 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] [2021-12-22 12:19:09,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 12:19:09,723 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:19:09,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:19:09,724 INFO L85 PathProgramCache]: Analyzing trace with hash 534456548, now seen corresponding path program 1 times [2021-12-22 12:19:09,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:19:09,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542536135] [2021-12-22 12:19:09,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:19:09,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:19:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:19:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:19:09,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:19:09,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542536135] [2021-12-22 12:19:09,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542536135] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:19:09,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:19:09,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:19:09,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696418417] [2021-12-22 12:19:09,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:19:09,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:19:09,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:19:09,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:19:09,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:19:09,831 INFO L87 Difference]: Start difference. First operand 18195 states and 30445 transitions. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:11,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:19:11,289 INFO L93 Difference]: Finished difference Result 35159 states and 58816 transitions. [2021-12-22 12:19:11,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:19:11,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 215 [2021-12-22 12:19:11,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:19:11,333 INFO L225 Difference]: With dead ends: 35159 [2021-12-22 12:19:11,333 INFO L226 Difference]: Without dead ends: 25877 [2021-12-22 12:19:11,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:19:11,345 INFO L933 BasicCegarLoop]: 1491 mSDtfsCounter, 332 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 2755 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:19:11,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 2755 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:19:11,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25877 states. [2021-12-22 12:19:12,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25877 to 25875. [2021-12-22 12:19:12,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25875 states, 25874 states have (on average 1.6694751487980213) internal successors, (43196), 25874 states have internal predecessors, (43196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:12,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25875 states to 25875 states and 43196 transitions. [2021-12-22 12:19:12,573 INFO L78 Accepts]: Start accepts. Automaton has 25875 states and 43196 transitions. Word has length 215 [2021-12-22 12:19:12,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:19:12,574 INFO L470 AbstractCegarLoop]: Abstraction has 25875 states and 43196 transitions. [2021-12-22 12:19:12,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:12,574 INFO L276 IsEmpty]: Start isEmpty. Operand 25875 states and 43196 transitions. [2021-12-22 12:19:12,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-22 12:19:12,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:19:12,580 INFO L514 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] [2021-12-22 12:19:12,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 12:19:12,580 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:19:12,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:19:12,581 INFO L85 PathProgramCache]: Analyzing trace with hash -759048876, now seen corresponding path program 1 times [2021-12-22 12:19:12,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:19:12,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114725139] [2021-12-22 12:19:12,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:19:12,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:19:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:19:12,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:19:12,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:19:12,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114725139] [2021-12-22 12:19:12,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114725139] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:19:12,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:19:12,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 12:19:12,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621995526] [2021-12-22 12:19:12,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:19:12,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 12:19:12,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:19:12,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 12:19:12,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 12:19:12,648 INFO L87 Difference]: Start difference. First operand 25875 states and 43196 transitions. Second operand has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:15,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:19:15,474 INFO L93 Difference]: Finished difference Result 76635 states and 128034 transitions. [2021-12-22 12:19:15,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 12:19:15,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 215 [2021-12-22 12:19:15,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:19:15,624 INFO L225 Difference]: With dead ends: 76635 [2021-12-22 12:19:15,624 INFO L226 Difference]: Without dead ends: 51512 [2021-12-22 12:19:15,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 12:19:15,663 INFO L933 BasicCegarLoop]: 1333 mSDtfsCounter, 1085 mSDsluCounter, 2742 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1085 SdHoareTripleChecker+Valid, 4075 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:19:15,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1085 Valid, 4075 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:19:15,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51512 states. [2021-12-22 12:19:18,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51512 to 38626. [2021-12-22 12:19:18,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38626 states, 38625 states have (on average 1.66715857605178) internal successors, (64394), 38625 states have internal predecessors, (64394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:18,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38626 states to 38626 states and 64394 transitions. [2021-12-22 12:19:18,209 INFO L78 Accepts]: Start accepts. Automaton has 38626 states and 64394 transitions. Word has length 215 [2021-12-22 12:19:18,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:19:18,209 INFO L470 AbstractCegarLoop]: Abstraction has 38626 states and 64394 transitions. [2021-12-22 12:19:18,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 4 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:18,210 INFO L276 IsEmpty]: Start isEmpty. Operand 38626 states and 64394 transitions. [2021-12-22 12:19:18,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-22 12:19:18,217 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:19:18,218 INFO L514 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] [2021-12-22 12:19:18,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 12:19:18,218 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:19:18,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:19:18,219 INFO L85 PathProgramCache]: Analyzing trace with hash -296680176, now seen corresponding path program 1 times [2021-12-22 12:19:18,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:19:18,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954157381] [2021-12-22 12:19:18,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:19:18,219 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:19:18,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:19:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:19:18,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:19:18,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954157381] [2021-12-22 12:19:18,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954157381] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:19:18,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:19:18,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:19:18,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351313734] [2021-12-22 12:19:18,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:19:18,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:19:18,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:19:18,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:19:18,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:19:18,289 INFO L87 Difference]: Start difference. First operand 38626 states and 64394 transitions. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:21,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:19:21,072 INFO L93 Difference]: Finished difference Result 75334 states and 125638 transitions. [2021-12-22 12:19:21,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:19:21,073 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 215 [2021-12-22 12:19:21,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:19:21,164 INFO L225 Difference]: With dead ends: 75334 [2021-12-22 12:19:21,164 INFO L226 Difference]: Without dead ends: 55424 [2021-12-22 12:19:21,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:19:21,195 INFO L933 BasicCegarLoop]: 1380 mSDtfsCounter, 316 mSDsluCounter, 1266 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 2646 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:19:21,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 2646 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:19:21,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55424 states. [2021-12-22 12:19:24,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55424 to 55422. [2021-12-22 12:19:25,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55422 states, 55421 states have (on average 1.6632323487486693) internal successors, (92178), 55421 states have internal predecessors, (92178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:25,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55422 states to 55422 states and 92178 transitions. [2021-12-22 12:19:25,113 INFO L78 Accepts]: Start accepts. Automaton has 55422 states and 92178 transitions. Word has length 215 [2021-12-22 12:19:25,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 12:19:25,113 INFO L470 AbstractCegarLoop]: Abstraction has 55422 states and 92178 transitions. [2021-12-22 12:19:25,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:25,114 INFO L276 IsEmpty]: Start isEmpty. Operand 55422 states and 92178 transitions. [2021-12-22 12:19:25,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-22 12:19:25,119 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 12:19:25,119 INFO L514 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] [2021-12-22 12:19:25,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 12:19:25,119 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 12:19:25,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 12:19:25,120 INFO L85 PathProgramCache]: Analyzing trace with hash -920100294, now seen corresponding path program 1 times [2021-12-22 12:19:25,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 12:19:25,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922072916] [2021-12-22 12:19:25,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 12:19:25,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 12:19:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 12:19:25,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 12:19:25,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 12:19:25,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922072916] [2021-12-22 12:19:25,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922072916] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 12:19:25,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 12:19:25,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 12:19:25,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663477400] [2021-12-22 12:19:25,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 12:19:25,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 12:19:25,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 12:19:25,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 12:19:25,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:19:25,199 INFO L87 Difference]: Start difference. First operand 55422 states and 92178 transitions. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 12:19:29,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 12:19:29,337 INFO L93 Difference]: Finished difference Result 105538 states and 175718 transitions. [2021-12-22 12:19:29,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 12:19:29,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 215 [2021-12-22 12:19:29,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 12:19:29,491 INFO L225 Difference]: With dead ends: 105538 [2021-12-22 12:19:29,491 INFO L226 Difference]: Without dead ends: 77194 [2021-12-22 12:19:29,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 12:19:29,533 INFO L933 BasicCegarLoop]: 1447 mSDtfsCounter, 324 mSDsluCounter, 1265 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 2712 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 12:19:29,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 2712 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 12:19:29,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77194 states.