./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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.4.1.ufo.BOUNDED-8.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 0e4a14a6af4061d17c8fde5475e0f3a38fede87663f764ff2ccff752f7727295 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 19:17:13,716 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 19:17:13,718 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 19:17:13,773 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 19:17:13,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 19:17:13,779 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 19:17:13,783 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 19:17:13,787 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 19:17:13,789 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 19:17:13,793 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 19:17:13,794 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 19:17:13,795 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 19:17:13,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 19:17:13,797 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 19:17:13,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 19:17:13,800 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 19:17:13,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 19:17:13,802 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 19:17:13,805 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 19:17:13,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 19:17:13,810 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 19:17:13,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 19:17:13,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 19:17:13,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 19:17:13,814 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 19:17:13,817 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 19:17:13,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 19:17:13,818 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 19:17:13,818 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 19:17:13,819 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 19:17:13,820 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 19:17:13,820 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 19:17:13,821 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 19:17:13,821 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 19:17:13,822 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 19:17:13,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 19:17:13,823 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 19:17:13,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 19:17:13,823 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 19:17:13,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 19:17:13,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 19:17:13,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 19:17:13,826 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 19:17:13,850 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 19:17:13,850 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 19:17:13,850 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 19:17:13,851 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 19:17:13,851 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 19:17:13,852 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 19:17:13,852 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 19:17:13,852 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 19:17:13,852 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 19:17:13,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 19:17:13,853 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 19:17:13,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 19:17:13,854 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 19:17:13,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 19:17:13,854 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 19:17:13,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 19:17:13,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 19:17:13,854 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 19:17:13,854 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 19:17:13,855 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 19:17:13,856 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 19:17:13,856 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 19:17:13,856 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 19:17:13,856 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 19:17:13,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 19:17:13,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 19:17:13,857 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 19:17:13,857 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 19:17:13,857 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 19:17:13,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 19:17:13,858 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 19:17:13,858 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 19:17:13,858 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 19:17:13,858 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e4a14a6af4061d17c8fde5475e0f3a38fede87663f764ff2ccff752f7727295 [2022-07-13 19:17:14,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 19:17:14,115 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 19:17:14,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 19:17:14,118 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 19:17:14,118 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 19:17:14,119 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2022-07-13 19:17:14,181 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bede09b84/9bfd490500c3422ba703a9093a8a52c2/FLAGa4d32c17b [2022-07-13 19:17:14,606 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 19:17:14,610 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2022-07-13 19:17:14,622 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bede09b84/9bfd490500c3422ba703a9093a8a52c2/FLAGa4d32c17b [2022-07-13 19:17:14,645 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bede09b84/9bfd490500c3422ba703a9093a8a52c2 [2022-07-13 19:17:14,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 19:17:14,652 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 19:17:14,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 19:17:14,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 19:17:14,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 19:17:14,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 07:17:14" (1/1) ... [2022-07-13 19:17:14,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31ff7e94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 07:17:14, skipping insertion in model container [2022-07-13 19:17:14,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 07:17:14" (1/1) ... [2022-07-13 19:17:14,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 19:17:14,697 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 19:17:14,910 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.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[13338,13351] [2022-07-13 19:17:14,985 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 19:17:15,003 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 19:17:15,048 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.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c[13338,13351] [2022-07-13 19:17:15,089 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 19:17:15,111 INFO L208 MainTranslator]: Completed translation [2022-07-13 19:17:15,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 07:17:15 WrapperNode [2022-07-13 19:17:15,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 19:17:15,113 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 19:17:15,114 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 19:17:15,114 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 19:17:15,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 07:17:15" (1/1) ... [2022-07-13 19:17:15,134 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 07:17:15" (1/1) ... [2022-07-13 19:17:15,194 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1328 [2022-07-13 19:17:15,195 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 19:17:15,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 19:17:15,197 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 19:17:15,197 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 19:17:15,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 07:17:15" (1/1) ... [2022-07-13 19:17:15,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 07:17:15" (1/1) ... [2022-07-13 19:17:15,212 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 07:17:15" (1/1) ... [2022-07-13 19:17:15,212 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 07:17:15" (1/1) ... [2022-07-13 19:17:15,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 07:17:15" (1/1) ... [2022-07-13 19:17:15,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 07:17:15" (1/1) ... [2022-07-13 19:17:15,257 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 07:17:15" (1/1) ... [2022-07-13 19:17:15,261 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 19:17:15,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 19:17:15,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 19:17:15,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 19:17:15,271 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 07:17:15" (1/1) ... [2022-07-13 19:17:15,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 19:17:15,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 19:17:15,296 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) [2022-07-13 19:17:15,314 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 [2022-07-13 19:17:15,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 19:17:15,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 19:17:15,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 19:17:15,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 19:17:15,476 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 19:17:15,477 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 19:17:16,165 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 19:17:16,172 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 19:17:16,173 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-13 19:17:16,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:17:16 BoogieIcfgContainer [2022-07-13 19:17:16,175 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 19:17:16,176 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 19:17:16,176 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 19:17:16,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 19:17:16,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 07:17:14" (1/3) ... [2022-07-13 19:17:16,179 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e3f1ebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:17:16, skipping insertion in model container [2022-07-13 19:17:16,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 07:17:15" (2/3) ... [2022-07-13 19:17:16,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e3f1ebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:17:16, skipping insertion in model container [2022-07-13 19:17:16,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:17:16" (3/3) ... [2022-07-13 19:17:16,181 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.BOUNDED-8.pals.c.v+cfa-reducer.c [2022-07-13 19:17:16,196 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 19:17:16,197 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 19:17:16,234 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 19:17:16,240 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1fa14638, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7d2bca25 [2022-07-13 19:17:16,240 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 19:17:16,246 INFO L276 IsEmpty]: Start isEmpty. Operand has 330 states, 328 states have (on average 1.7896341463414633) internal successors, (587), 329 states have internal predecessors, (587), 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) [2022-07-13 19:17:16,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-13 19:17:16,296 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 19:17:16,296 INFO L195 NwaCegarLoop]: 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] [2022-07-13 19:17:16,297 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 19:17:16,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 19:17:16,303 INFO L85 PathProgramCache]: Analyzing trace with hash 767655198, now seen corresponding path program 1 times [2022-07-13 19:17:16,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 19:17:16,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645992762] [2022-07-13 19:17:16,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 19:17:16,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 19:17:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 19:17:16,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 19:17:16,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 19:17:16,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645992762] [2022-07-13 19:17:16,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645992762] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 19:17:16,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 19:17:16,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 19:17:16,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976603546] [2022-07-13 19:17:16,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 19:17:16,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 19:17:16,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 19:17:16,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 19:17:16,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 19:17:16,665 INFO L87 Difference]: Start difference. First operand has 330 states, 328 states have (on average 1.7896341463414633) internal successors, (587), 329 states have internal predecessors, (587), 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 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2022-07-13 19:17:16,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 19:17:16,756 INFO L93 Difference]: Finished difference Result 616 states and 1067 transitions. [2022-07-13 19:17:16,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 19:17:16,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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 106 [2022-07-13 19:17:16,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 19:17:16,775 INFO L225 Difference]: With dead ends: 616 [2022-07-13 19:17:16,775 INFO L226 Difference]: Without dead ends: 461 [2022-07-13 19:17:16,778 INFO L412 NwaCegarLoop]: 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 [2022-07-13 19:17:16,780 INFO L413 NwaCegarLoop]: 587 mSDtfsCounter, 244 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 1108 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 [2022-07-13 19:17:16,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 1108 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 19:17:16,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-07-13 19:17:16,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 459. [2022-07-13 19:17:16,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 1.6746724890829694) internal successors, (767), 458 states have internal predecessors, (767), 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) [2022-07-13 19:17:16,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 767 transitions. [2022-07-13 19:17:16,862 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 767 transitions. Word has length 106 [2022-07-13 19:17:16,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 19:17:16,863 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 767 transitions. [2022-07-13 19:17:16,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 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) [2022-07-13 19:17:16,864 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 767 transitions. [2022-07-13 19:17:16,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-13 19:17:16,871 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 19:17:16,871 INFO L195 NwaCegarLoop]: 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] [2022-07-13 19:17:16,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 19:17:16,872 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 19:17:16,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 19:17:16,872 INFO L85 PathProgramCache]: Analyzing trace with hash -383361066, now seen corresponding path program 1 times [2022-07-13 19:17:16,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 19:17:16,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946678931] [2022-07-13 19:17:16,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 19:17:16,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 19:17:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 19:17:17,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 19:17:17,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 19:17:17,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946678931] [2022-07-13 19:17:17,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946678931] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 19:17:17,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 19:17:17,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 19:17:17,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268520843] [2022-07-13 19:17:17,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 19:17:17,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 19:17:17,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 19:17:17,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 19:17:17,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 19:17:17,004 INFO L87 Difference]: Start difference. First operand 459 states and 767 transitions. Second operand has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2022-07-13 19:17:17,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 19:17:17,052 INFO L93 Difference]: Finished difference Result 995 states and 1663 transitions. [2022-07-13 19:17:17,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 19:17:17,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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 109 [2022-07-13 19:17:17,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 19:17:17,056 INFO L225 Difference]: With dead ends: 995 [2022-07-13 19:17:17,056 INFO L226 Difference]: Without dead ends: 717 [2022-07-13 19:17:17,057 INFO L412 NwaCegarLoop]: 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 [2022-07-13 19:17:17,058 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 218 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 1063 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 [2022-07-13 19:17:17,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 1063 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 19:17:17,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-07-13 19:17:17,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 715. [2022-07-13 19:17:17,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 1.6722689075630253) internal successors, (1194), 714 states have internal predecessors, (1194), 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) [2022-07-13 19:17:17,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1194 transitions. [2022-07-13 19:17:17,087 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1194 transitions. Word has length 109 [2022-07-13 19:17:17,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 19:17:17,089 INFO L495 AbstractCegarLoop]: Abstraction has 715 states and 1194 transitions. [2022-07-13 19:17:17,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.333333333333336) internal successors, (109), 3 states have internal predecessors, (109), 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) [2022-07-13 19:17:17,090 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1194 transitions. [2022-07-13 19:17:17,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-13 19:17:17,096 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 19:17:17,097 INFO L195 NwaCegarLoop]: 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] [2022-07-13 19:17:17,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 19:17:17,099 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 19:17:17,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 19:17:17,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1484591587, now seen corresponding path program 1 times [2022-07-13 19:17:17,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 19:17:17,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394189498] [2022-07-13 19:17:17,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 19:17:17,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 19:17:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 19:17:17,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 19:17:17,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 19:17:17,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394189498] [2022-07-13 19:17:17,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394189498] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 19:17:17,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 19:17:17,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 19:17:17,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994641507] [2022-07-13 19:17:17,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 19:17:17,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 19:17:17,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 19:17:17,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 19:17:17,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 19:17:17,219 INFO L87 Difference]: Start difference. First operand 715 states and 1194 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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) [2022-07-13 19:17:17,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 19:17:17,260 INFO L93 Difference]: Finished difference Result 1743 states and 2908 transitions. [2022-07-13 19:17:17,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 19:17:17,260 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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 112 [2022-07-13 19:17:17,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 19:17:17,266 INFO L225 Difference]: With dead ends: 1743 [2022-07-13 19:17:17,266 INFO L226 Difference]: Without dead ends: 1209 [2022-07-13 19:17:17,270 INFO L412 NwaCegarLoop]: 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 [2022-07-13 19:17:17,275 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 211 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 1064 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 [2022-07-13 19:17:17,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 1064 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 19:17:17,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2022-07-13 19:17:17,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 1207. [2022-07-13 19:17:17,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 1.6666666666666667) internal successors, (2010), 1206 states have internal predecessors, (2010), 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) [2022-07-13 19:17:17,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 2010 transitions. [2022-07-13 19:17:17,319 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 2010 transitions. Word has length 112 [2022-07-13 19:17:17,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 19:17:17,319 INFO L495 AbstractCegarLoop]: Abstraction has 1207 states and 2010 transitions. [2022-07-13 19:17:17,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 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) [2022-07-13 19:17:17,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 2010 transitions. [2022-07-13 19:17:17,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-13 19:17:17,321 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 19:17:17,322 INFO L195 NwaCegarLoop]: 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] [2022-07-13 19:17:17,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 19:17:17,322 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 19:17:17,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 19:17:17,323 INFO L85 PathProgramCache]: Analyzing trace with hash 2071299369, now seen corresponding path program 1 times [2022-07-13 19:17:17,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 19:17:17,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158139939] [2022-07-13 19:17:17,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 19:17:17,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 19:17:17,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 19:17:17,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 19:17:17,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 19:17:17,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158139939] [2022-07-13 19:17:17,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158139939] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 19:17:17,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 19:17:17,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 19:17:17,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396753175] [2022-07-13 19:17:17,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 19:17:17,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 19:17:17,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 19:17:17,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 19:17:17,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 19:17:17,383 INFO L87 Difference]: Start difference. First operand 1207 states and 2010 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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) [2022-07-13 19:17:17,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 19:17:17,458 INFO L93 Difference]: Finished difference Result 3179 states and 5284 transitions. [2022-07-13 19:17:17,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 19:17:17,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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 115 [2022-07-13 19:17:17,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 19:17:17,465 INFO L225 Difference]: With dead ends: 3179 [2022-07-13 19:17:17,466 INFO L226 Difference]: Without dead ends: 2153 [2022-07-13 19:17:17,467 INFO L412 NwaCegarLoop]: 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 [2022-07-13 19:17:17,475 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 204 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1065 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 [2022-07-13 19:17:17,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 1065 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 19:17:17,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2153 states. [2022-07-13 19:17:17,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2153 to 2151. [2022-07-13 19:17:17,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2151 states, 2150 states have (on average 1.6586046511627908) internal successors, (3566), 2150 states have internal predecessors, (3566), 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) [2022-07-13 19:17:17,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2151 states to 2151 states and 3566 transitions. [2022-07-13 19:17:17,545 INFO L78 Accepts]: Start accepts. Automaton has 2151 states and 3566 transitions. Word has length 115 [2022-07-13 19:17:17,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 19:17:17,545 INFO L495 AbstractCegarLoop]: Abstraction has 2151 states and 3566 transitions. [2022-07-13 19:17:17,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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) [2022-07-13 19:17:17,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2151 states and 3566 transitions. [2022-07-13 19:17:17,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-13 19:17:17,547 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 19:17:17,547 INFO L195 NwaCegarLoop]: 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] [2022-07-13 19:17:17,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 19:17:17,548 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 19:17:17,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 19:17:17,548 INFO L85 PathProgramCache]: Analyzing trace with hash 895641604, now seen corresponding path program 1 times [2022-07-13 19:17:17,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 19:17:17,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267958607] [2022-07-13 19:17:17,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 19:17:17,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 19:17:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 19:17:17,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 19:17:17,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 19:17:17,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267958607] [2022-07-13 19:17:17,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267958607] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 19:17:17,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 19:17:17,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 19:17:17,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093710008] [2022-07-13 19:17:17,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 19:17:17,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 19:17:17,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 19:17:17,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 19:17:17,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 19:17:17,659 INFO L87 Difference]: Start difference. First operand 2151 states and 3566 transitions. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 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) [2022-07-13 19:17:18,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 19:17:18,159 INFO L93 Difference]: Finished difference Result 11271 states and 18798 transitions. [2022-07-13 19:17:18,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 19:17:18,160 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 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 118 [2022-07-13 19:17:18,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 19:17:18,188 INFO L225 Difference]: With dead ends: 11271 [2022-07-13 19:17:18,188 INFO L226 Difference]: Without dead ends: 9301 [2022-07-13 19:17:18,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-13 19:17:18,195 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 2121 mSDsluCounter, 4357 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2121 SdHoareTripleChecker+Valid, 4900 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 19:17:18,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2121 Valid, 4900 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 19:17:18,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9301 states. [2022-07-13 19:17:18,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9301 to 3989. [2022-07-13 19:17:18,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3989 states, 3988 states have (on average 1.657221664994985) internal successors, (6609), 3988 states have internal predecessors, (6609), 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) [2022-07-13 19:17:18,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3989 states to 3989 states and 6609 transitions. [2022-07-13 19:17:18,443 INFO L78 Accepts]: Start accepts. Automaton has 3989 states and 6609 transitions. Word has length 118 [2022-07-13 19:17:18,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 19:17:18,444 INFO L495 AbstractCegarLoop]: Abstraction has 3989 states and 6609 transitions. [2022-07-13 19:17:18,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 states have internal predecessors, (118), 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) [2022-07-13 19:17:18,447 INFO L276 IsEmpty]: Start isEmpty. Operand 3989 states and 6609 transitions. [2022-07-13 19:17:18,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-13 19:17:18,449 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 19:17:18,450 INFO L195 NwaCegarLoop]: 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] [2022-07-13 19:17:18,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 19:17:18,450 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 19:17:18,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 19:17:18,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1928023900, now seen corresponding path program 1 times [2022-07-13 19:17:18,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 19:17:18,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023788756] [2022-07-13 19:17:18,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 19:17:18,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 19:17:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 19:17:18,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 19:17:18,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 19:17:18,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023788756] [2022-07-13 19:17:18,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023788756] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 19:17:18,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 19:17:18,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 19:17:18,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961853949] [2022-07-13 19:17:18,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 19:17:18,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 19:17:18,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 19:17:18,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 19:17:18,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 19:17:18,535 INFO L87 Difference]: Start difference. First operand 3989 states and 6609 transitions. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 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) [2022-07-13 19:17:18,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 19:17:18,961 INFO L93 Difference]: Finished difference Result 11701 states and 19469 transitions. [2022-07-13 19:17:18,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 19:17:18,962 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 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 119 [2022-07-13 19:17:18,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 19:17:18,987 INFO L225 Difference]: With dead ends: 11701 [2022-07-13 19:17:18,988 INFO L226 Difference]: Without dead ends: 7893 [2022-07-13 19:17:18,994 INFO L412 NwaCegarLoop]: 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 [2022-07-13 19:17:18,996 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 717 mSDsluCounter, 1271 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 1819 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 [2022-07-13 19:17:18,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [717 Valid, 1819 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 19:17:19,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7893 states. [2022-07-13 19:17:19,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7893 to 5924. [2022-07-13 19:17:19,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5924 states, 5923 states have (on average 1.6586189431031573) internal successors, (9824), 5923 states have internal predecessors, (9824), 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) [2022-07-13 19:17:19,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5924 states to 5924 states and 9824 transitions. [2022-07-13 19:17:19,380 INFO L78 Accepts]: Start accepts. Automaton has 5924 states and 9824 transitions. Word has length 119 [2022-07-13 19:17:19,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 19:17:19,381 INFO L495 AbstractCegarLoop]: Abstraction has 5924 states and 9824 transitions. [2022-07-13 19:17:19,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 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) [2022-07-13 19:17:19,381 INFO L276 IsEmpty]: Start isEmpty. Operand 5924 states and 9824 transitions. [2022-07-13 19:17:19,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-13 19:17:19,384 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 19:17:19,384 INFO L195 NwaCegarLoop]: 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] [2022-07-13 19:17:19,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 19:17:19,385 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 19:17:19,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 19:17:19,385 INFO L85 PathProgramCache]: Analyzing trace with hash -230071643, now seen corresponding path program 1 times [2022-07-13 19:17:19,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 19:17:19,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898695853] [2022-07-13 19:17:19,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 19:17:19,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 19:17:19,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 19:17:19,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 19:17:19,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 19:17:19,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898695853] [2022-07-13 19:17:19,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898695853] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 19:17:19,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 19:17:19,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 19:17:19,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540128595] [2022-07-13 19:17:19,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 19:17:19,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 19:17:19,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 19:17:19,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 19:17:19,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 19:17:19,451 INFO L87 Difference]: Start difference. First operand 5924 states and 9824 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2022-07-13 19:17:19,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 19:17:19,894 INFO L93 Difference]: Finished difference Result 13013 states and 21666 transitions. [2022-07-13 19:17:19,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 19:17:19,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 120 [2022-07-13 19:17:19,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 19:17:19,930 INFO L225 Difference]: With dead ends: 13013 [2022-07-13 19:17:19,931 INFO L226 Difference]: Without dead ends: 9012 [2022-07-13 19:17:19,938 INFO L412 NwaCegarLoop]: 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 [2022-07-13 19:17:19,940 INFO L413 NwaCegarLoop]: 731 mSDtfsCounter, 226 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1232 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 [2022-07-13 19:17:19,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 1232 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 19:17:19,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9012 states. [2022-07-13 19:17:20,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9012 to 9010. [2022-07-13 19:17:20,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9010 states, 9009 states have (on average 1.6581196581196582) internal successors, (14938), 9009 states have internal predecessors, (14938), 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) [2022-07-13 19:17:20,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9010 states to 9010 states and 14938 transitions. [2022-07-13 19:17:20,418 INFO L78 Accepts]: Start accepts. Automaton has 9010 states and 14938 transitions. Word has length 120 [2022-07-13 19:17:20,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 19:17:20,418 INFO L495 AbstractCegarLoop]: Abstraction has 9010 states and 14938 transitions. [2022-07-13 19:17:20,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2022-07-13 19:17:20,419 INFO L276 IsEmpty]: Start isEmpty. Operand 9010 states and 14938 transitions. [2022-07-13 19:17:20,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-13 19:17:20,421 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 19:17:20,421 INFO L195 NwaCegarLoop]: 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] [2022-07-13 19:17:20,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 19:17:20,421 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 19:17:20,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 19:17:20,422 INFO L85 PathProgramCache]: Analyzing trace with hash -93787815, now seen corresponding path program 1 times [2022-07-13 19:17:20,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 19:17:20,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328844455] [2022-07-13 19:17:20,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 19:17:20,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 19:17:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 19:17:20,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 19:17:20,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 19:17:20,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328844455] [2022-07-13 19:17:20,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328844455] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 19:17:20,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 19:17:20,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 19:17:20,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782491525] [2022-07-13 19:17:20,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 19:17:20,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 19:17:20,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 19:17:20,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 19:17:20,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 19:17:20,467 INFO L87 Difference]: Start difference. First operand 9010 states and 14938 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2022-07-13 19:17:21,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 19:17:21,172 INFO L93 Difference]: Finished difference Result 17393 states and 28867 transitions. [2022-07-13 19:17:21,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 19:17:21,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 120 [2022-07-13 19:17:21,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 19:17:21,199 INFO L225 Difference]: With dead ends: 17393 [2022-07-13 19:17:21,200 INFO L226 Difference]: Without dead ends: 12631 [2022-07-13 19:17:21,208 INFO L412 NwaCegarLoop]: 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 [2022-07-13 19:17:21,209 INFO L413 NwaCegarLoop]: 653 mSDtfsCounter, 212 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1156 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 [2022-07-13 19:17:21,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 1156 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 19:17:21,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12631 states. [2022-07-13 19:17:21,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12631 to 12629. [2022-07-13 19:17:21,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12629 states, 12628 states have (on average 1.6539436173582516) internal successors, (20886), 12628 states have internal predecessors, (20886), 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) [2022-07-13 19:17:21,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12629 states to 12629 states and 20886 transitions. [2022-07-13 19:17:21,811 INFO L78 Accepts]: Start accepts. Automaton has 12629 states and 20886 transitions. Word has length 120 [2022-07-13 19:17:21,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 19:17:21,811 INFO L495 AbstractCegarLoop]: Abstraction has 12629 states and 20886 transitions. [2022-07-13 19:17:21,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2022-07-13 19:17:21,811 INFO L276 IsEmpty]: Start isEmpty. Operand 12629 states and 20886 transitions. [2022-07-13 19:17:21,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-13 19:17:21,813 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 19:17:21,813 INFO L195 NwaCegarLoop]: 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] [2022-07-13 19:17:21,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 19:17:21,814 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 19:17:21,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 19:17:21,815 INFO L85 PathProgramCache]: Analyzing trace with hash -423305269, now seen corresponding path program 1 times [2022-07-13 19:17:21,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 19:17:21,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072827232] [2022-07-13 19:17:21,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 19:17:21,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 19:17:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 19:17:21,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 19:17:21,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 19:17:21,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072827232] [2022-07-13 19:17:21,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072827232] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 19:17:21,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 19:17:21,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 19:17:21,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633747048] [2022-07-13 19:17:21,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 19:17:21,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 19:17:21,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 19:17:21,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 19:17:21,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 19:17:21,869 INFO L87 Difference]: Start difference. First operand 12629 states and 20886 transitions. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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) [2022-07-13 19:17:23,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 19:17:23,162 INFO L93 Difference]: Finished difference Result 37653 states and 62420 transitions. [2022-07-13 19:17:23,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 19:17:23,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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 120 [2022-07-13 19:17:23,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 19:17:23,218 INFO L225 Difference]: With dead ends: 37653 [2022-07-13 19:17:23,218 INFO L226 Difference]: Without dead ends: 25266 [2022-07-13 19:17:23,241 INFO L412 NwaCegarLoop]: 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 [2022-07-13 19:17:23,242 INFO L413 NwaCegarLoop]: 568 mSDtfsCounter, 716 mSDsluCounter, 1175 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 1743 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 19:17:23,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [716 Valid, 1743 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 19:17:23,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25266 states. [2022-07-13 19:17:24,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25266 to 18890. [2022-07-13 19:17:24,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18890 states, 18889 states have (on average 1.6506961723754565) internal successors, (31180), 18889 states have internal predecessors, (31180), 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) [2022-07-13 19:17:24,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18890 states to 18890 states and 31180 transitions. [2022-07-13 19:17:24,376 INFO L78 Accepts]: Start accepts. Automaton has 18890 states and 31180 transitions. Word has length 120 [2022-07-13 19:17:24,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 19:17:24,376 INFO L495 AbstractCegarLoop]: Abstraction has 18890 states and 31180 transitions. [2022-07-13 19:17:24,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 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) [2022-07-13 19:17:24,376 INFO L276 IsEmpty]: Start isEmpty. Operand 18890 states and 31180 transitions. [2022-07-13 19:17:24,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-13 19:17:24,378 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 19:17:24,378 INFO L195 NwaCegarLoop]: 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] [2022-07-13 19:17:24,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 19:17:24,378 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 19:17:24,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 19:17:24,379 INFO L85 PathProgramCache]: Analyzing trace with hash 2090250357, now seen corresponding path program 1 times [2022-07-13 19:17:24,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 19:17:24,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523059386] [2022-07-13 19:17:24,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 19:17:24,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 19:17:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 19:17:24,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 19:17:24,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 19:17:24,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523059386] [2022-07-13 19:17:24,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523059386] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 19:17:24,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 19:17:24,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 19:17:24,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903549045] [2022-07-13 19:17:24,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 19:17:24,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 19:17:24,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 19:17:24,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 19:17:24,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 19:17:24,420 INFO L87 Difference]: Start difference. First operand 18890 states and 31180 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2022-07-13 19:17:25,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 19:17:25,485 INFO L93 Difference]: Finished difference Result 36442 states and 60224 transitions. [2022-07-13 19:17:25,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 19:17:25,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 120 [2022-07-13 19:17:25,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 19:17:25,543 INFO L225 Difference]: With dead ends: 36442 [2022-07-13 19:17:25,543 INFO L226 Difference]: Without dead ends: 26360 [2022-07-13 19:17:25,562 INFO L412 NwaCegarLoop]: 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 [2022-07-13 19:17:25,563 INFO L413 NwaCegarLoop]: 619 mSDtfsCounter, 205 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1123 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 [2022-07-13 19:17:25,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1123 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 19:17:25,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26360 states. [2022-07-13 19:17:26,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26360 to 26358. [2022-07-13 19:17:26,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26358 states, 26357 states have (on average 1.645938460371059) internal successors, (43382), 26357 states have internal predecessors, (43382), 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) [2022-07-13 19:17:26,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26358 states to 26358 states and 43382 transitions. [2022-07-13 19:17:26,965 INFO L78 Accepts]: Start accepts. Automaton has 26358 states and 43382 transitions. Word has length 120 [2022-07-13 19:17:26,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 19:17:26,965 INFO L495 AbstractCegarLoop]: Abstraction has 26358 states and 43382 transitions. [2022-07-13 19:17:26,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2022-07-13 19:17:26,966 INFO L276 IsEmpty]: Start isEmpty. Operand 26358 states and 43382 transitions. [2022-07-13 19:17:26,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-13 19:17:26,967 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 19:17:26,967 INFO L195 NwaCegarLoop]: 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] [2022-07-13 19:17:26,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-13 19:17:26,968 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 19:17:26,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 19:17:26,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1191149015, now seen corresponding path program 1 times [2022-07-13 19:17:26,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 19:17:26,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576647627] [2022-07-13 19:17:26,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 19:17:26,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 19:17:26,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 19:17:27,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 19:17:27,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 19:17:27,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576647627] [2022-07-13 19:17:27,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576647627] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 19:17:27,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 19:17:27,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 19:17:27,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162850374] [2022-07-13 19:17:27,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 19:17:27,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 19:17:27,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 19:17:27,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 19:17:27,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 19:17:27,016 INFO L87 Difference]: Start difference. First operand 26358 states and 43382 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2022-07-13 19:17:28,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 19:17:28,981 INFO L93 Difference]: Finished difference Result 57155 states and 94163 transitions. [2022-07-13 19:17:28,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 19:17:28,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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 120 [2022-07-13 19:17:28,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 19:17:29,061 INFO L225 Difference]: With dead ends: 57155 [2022-07-13 19:17:29,062 INFO L226 Difference]: Without dead ends: 39061 [2022-07-13 19:17:29,096 INFO L412 NwaCegarLoop]: 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 [2022-07-13 19:17:29,097 INFO L413 NwaCegarLoop]: 705 mSDtfsCounter, 219 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 1207 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 [2022-07-13 19:17:29,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 1207 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 19:17:29,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39061 states. [2022-07-13 19:17:31,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39061 to 39059. [2022-07-13 19:17:31,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39059 states, 39058 states have (on average 1.6395872804547085) internal successors, (64039), 39058 states have internal predecessors, (64039), 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) [2022-07-13 19:17:31,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39059 states to 39059 states and 64039 transitions. [2022-07-13 19:17:31,210 INFO L78 Accepts]: Start accepts. Automaton has 39059 states and 64039 transitions. Word has length 120 [2022-07-13 19:17:31,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 19:17:31,211 INFO L495 AbstractCegarLoop]: Abstraction has 39059 states and 64039 transitions. [2022-07-13 19:17:31,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 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) [2022-07-13 19:17:31,211 INFO L276 IsEmpty]: Start isEmpty. Operand 39059 states and 64039 transitions. [2022-07-13 19:17:31,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-07-13 19:17:31,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 19:17:31,212 INFO L195 NwaCegarLoop]: 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] [2022-07-13 19:17:31,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 19:17:31,213 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 19:17:31,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 19:17:31,213 INFO L85 PathProgramCache]: Analyzing trace with hash -295507453, now seen corresponding path program 1 times [2022-07-13 19:17:31,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 19:17:31,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385933870] [2022-07-13 19:17:31,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 19:17:31,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 19:17:31,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 19:17:31,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 19:17:31,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 19:17:31,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385933870] [2022-07-13 19:17:31,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385933870] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 19:17:31,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 19:17:31,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 19:17:31,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992035160] [2022-07-13 19:17:31,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 19:17:31,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 19:17:31,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 19:17:31,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 19:17:31,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 19:17:31,268 INFO L87 Difference]: Start difference. First operand 39059 states and 64039 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 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) [2022-07-13 19:17:36,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 19:17:36,097 INFO L93 Difference]: Finished difference Result 126525 states and 207699 transitions. [2022-07-13 19:17:36,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 19:17:36,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 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 121 [2022-07-13 19:17:36,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 19:17:36,282 INFO L225 Difference]: With dead ends: 126525 [2022-07-13 19:17:36,282 INFO L226 Difference]: Without dead ends: 87715 [2022-07-13 19:17:36,341 INFO L412 NwaCegarLoop]: 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 [2022-07-13 19:17:36,342 INFO L413 NwaCegarLoop]: 536 mSDtfsCounter, 714 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 1742 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 [2022-07-13 19:17:36,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [714 Valid, 1742 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 19:17:36,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87715 states. [2022-07-13 19:17:39,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87715 to 63244. [2022-07-13 19:17:40,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63244 states, 63243 states have (on average 1.6341097038407413) internal successors, (103346), 63243 states have internal predecessors, (103346), 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) [2022-07-13 19:17:40,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63244 states to 63244 states and 103346 transitions. [2022-07-13 19:17:40,184 INFO L78 Accepts]: Start accepts. Automaton has 63244 states and 103346 transitions. Word has length 121 [2022-07-13 19:17:40,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 19:17:40,185 INFO L495 AbstractCegarLoop]: Abstraction has 63244 states and 103346 transitions. [2022-07-13 19:17:40,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 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) [2022-07-13 19:17:40,185 INFO L276 IsEmpty]: Start isEmpty. Operand 63244 states and 103346 transitions. [2022-07-13 19:17:40,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-13 19:17:40,187 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 19:17:40,187 INFO L195 NwaCegarLoop]: 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] [2022-07-13 19:17:40,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 19:17:40,188 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 19:17:40,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 19:17:40,188 INFO L85 PathProgramCache]: Analyzing trace with hash -624184430, now seen corresponding path program 1 times [2022-07-13 19:17:40,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 19:17:40,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427068672] [2022-07-13 19:17:40,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 19:17:40,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 19:17:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 19:17:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 19:17:40,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 19:17:40,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427068672] [2022-07-13 19:17:40,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427068672] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 19:17:40,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 19:17:40,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 19:17:40,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075321475] [2022-07-13 19:17:40,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 19:17:40,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 19:17:40,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 19:17:40,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 19:17:40,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 19:17:40,235 INFO L87 Difference]: Start difference. First operand 63244 states and 103346 transitions. Second operand has 4 states, 4 states have (on average 30.5) internal successors, (122), 4 states have internal predecessors, (122), 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)