./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label21.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/eca-rers2012/Problem13_label21.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 14f7b86bfc883455824a54ae68bb832997924960967cf306b251b3f457d9ff4b --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 12:32:52,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 12:32:52,561 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 12:32:52,605 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 12:32:52,606 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 12:32:52,607 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 12:32:52,609 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 12:32:52,611 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 12:32:52,613 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 12:32:52,616 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 12:32:52,617 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 12:32:52,619 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 12:32:52,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 12:32:52,621 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 12:32:52,622 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 12:32:52,625 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 12:32:52,626 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 12:32:52,627 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 12:32:52,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 12:32:52,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 12:32:52,635 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 12:32:52,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 12:32:52,637 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 12:32:52,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 12:32:52,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 12:32:52,642 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 12:32:52,642 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 12:32:52,642 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 12:32:52,643 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 12:32:52,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 12:32:52,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 12:32:52,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 12:32:52,647 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 12:32:52,647 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 12:32:52,648 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 12:32:52,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 12:32:52,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 12:32:52,649 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 12:32:52,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 12:32:52,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 12:32:52,650 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 12:32:52,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 12:32:52,653 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 12:32:52,682 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 12:32:52,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 12:32:52,683 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 12:32:52,683 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 12:32:52,684 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 12:32:52,684 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 12:32:52,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 12:32:52,685 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 12:32:52,685 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 12:32:52,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 12:32:52,686 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 12:32:52,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 12:32:52,686 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 12:32:52,686 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 12:32:52,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 12:32:52,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 12:32:52,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 12:32:52,687 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 12:32:52,687 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 12:32:52,688 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 12:32:52,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 12:32:52,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 12:32:52,688 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 12:32:52,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 12:32:52,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 12:32:52,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 12:32:52,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 12:32:52,689 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 12:32:52,697 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 12:32:52,697 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 12:32:52,697 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 12:32:52,697 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 12:32:52,698 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 12:32:52,698 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 14f7b86bfc883455824a54ae68bb832997924960967cf306b251b3f457d9ff4b [2022-07-22 12:32:52,919 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 12:32:52,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 12:32:52,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 12:32:52,944 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 12:32:52,944 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 12:32:52,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label21.c [2022-07-22 12:32:53,002 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f5bdeb8a/5388df036ab640d3a36365b3cc7afecc/FLAG9af7382d8 [2022-07-22 12:32:53,660 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 12:32:53,660 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label21.c [2022-07-22 12:32:53,688 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f5bdeb8a/5388df036ab640d3a36365b3cc7afecc/FLAG9af7382d8 [2022-07-22 12:32:54,027 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f5bdeb8a/5388df036ab640d3a36365b3cc7afecc [2022-07-22 12:32:54,029 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 12:32:54,030 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 12:32:54,031 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 12:32:54,031 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 12:32:54,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 12:32:54,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:32:54" (1/1) ... [2022-07-22 12:32:54,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d279bc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:32:54, skipping insertion in model container [2022-07-22 12:32:54,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:32:54" (1/1) ... [2022-07-22 12:32:54,044 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 12:32:54,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 12:32:54,430 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/eca-rers2012/Problem13_label21.c[3130,3143] [2022-07-22 12:32:55,221 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:32:55,227 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 12:32:55,255 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/eca-rers2012/Problem13_label21.c[3130,3143] [2022-07-22 12:32:55,690 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:32:55,711 INFO L208 MainTranslator]: Completed translation [2022-07-22 12:32:55,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:32:55 WrapperNode [2022-07-22 12:32:55,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 12:32:55,713 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 12:32:55,713 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 12:32:55,713 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 12:32:55,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:32:55" (1/1) ... [2022-07-22 12:32:55,799 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:32:55" (1/1) ... [2022-07-22 12:32:56,317 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2022-07-22 12:32:56,318 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 12:32:56,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 12:32:56,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 12:32:56,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 12:32:56,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:32:55" (1/1) ... [2022-07-22 12:32:56,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:32:55" (1/1) ... [2022-07-22 12:32:56,478 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:32:55" (1/1) ... [2022-07-22 12:32:56,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:32:55" (1/1) ... [2022-07-22 12:32:56,768 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:32:55" (1/1) ... [2022-07-22 12:32:56,825 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:32:55" (1/1) ... [2022-07-22 12:32:56,865 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:32:55" (1/1) ... [2022-07-22 12:32:56,955 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 12:32:56,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 12:32:56,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 12:32:56,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 12:32:56,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:32:55" (1/1) ... [2022-07-22 12:32:56,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 12:32:56,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:32:56,988 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) [2022-07-22 12:32:57,013 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 [2022-07-22 12:32:57,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 12:32:57,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 12:32:57,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 12:32:57,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 12:32:57,143 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 12:32:57,145 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 12:33:01,381 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 12:33:01,393 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 12:33:01,393 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 12:33:01,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:33:01 BoogieIcfgContainer [2022-07-22 12:33:01,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 12:33:01,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 12:33:01,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 12:33:01,401 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 12:33:01,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 12:32:54" (1/3) ... [2022-07-22 12:33:01,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f28bdf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:33:01, skipping insertion in model container [2022-07-22 12:33:01,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:32:55" (2/3) ... [2022-07-22 12:33:01,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f28bdf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:33:01, skipping insertion in model container [2022-07-22 12:33:01,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:33:01" (3/3) ... [2022-07-22 12:33:01,403 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label21.c [2022-07-22 12:33:01,414 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 12:33:01,414 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 12:33:01,470 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 12:33:01,476 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@23df00c4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7e1fa5a3 [2022-07-22 12:33:01,476 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 12:33:01,483 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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) [2022-07-22 12:33:01,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-22 12:33:01,489 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:33:01,489 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] [2022-07-22 12:33:01,490 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:33:01,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:33:01,494 INFO L85 PathProgramCache]: Analyzing trace with hash -279853278, now seen corresponding path program 1 times [2022-07-22 12:33:01,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:33:01,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663223256] [2022-07-22 12:33:01,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:33:01,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:33:01,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:33:01,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:33:01,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:33:01,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663223256] [2022-07-22 12:33:01,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663223256] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:33:01,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:33:01,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:33:01,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046559542] [2022-07-22 12:33:01,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:33:01,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:33:01,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:33:01,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:33:01,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:33:01,757 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 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) [2022-07-22 12:33:06,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:33:06,073 INFO L93 Difference]: Finished difference Result 3121 states and 5804 transitions. [2022-07-22 12:33:06,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:33:06,075 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 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 20 [2022-07-22 12:33:06,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:33:06,101 INFO L225 Difference]: With dead ends: 3121 [2022-07-22 12:33:06,102 INFO L226 Difference]: Without dead ends: 1944 [2022-07-22 12:33:06,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:33:06,112 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 969 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3124 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 3701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 3124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:33:06,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [969 Valid, 575 Invalid, 3701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 3124 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-07-22 12:33:06,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2022-07-22 12:33:06,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1873. [2022-07-22 12:33:06,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 1.7393162393162394) internal successors, (3256), 1872 states have internal predecessors, (3256), 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) [2022-07-22 12:33:06,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3256 transitions. [2022-07-22 12:33:06,215 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 3256 transitions. Word has length 20 [2022-07-22 12:33:06,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:33:06,215 INFO L495 AbstractCegarLoop]: Abstraction has 1873 states and 3256 transitions. [2022-07-22 12:33:06,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 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) [2022-07-22 12:33:06,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 3256 transitions. [2022-07-22 12:33:06,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-22 12:33:06,218 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:33:06,218 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:33:06,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 12:33:06,219 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:33:06,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:33:06,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1306602698, now seen corresponding path program 1 times [2022-07-22 12:33:06,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:33:06,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685522980] [2022-07-22 12:33:06,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:33:06,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:33:06,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:33:06,413 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:33:06,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:33:06,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685522980] [2022-07-22 12:33:06,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685522980] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:33:06,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:33:06,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:33:06,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783141060] [2022-07-22 12:33:06,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:33:06,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:33:06,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:33:06,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:33:06,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:33:06,419 INFO L87 Difference]: Start difference. First operand 1873 states and 3256 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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) [2022-07-22 12:33:09,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:33:09,907 INFO L93 Difference]: Finished difference Result 5351 states and 9369 transitions. [2022-07-22 12:33:09,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:33:09,916 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 85 [2022-07-22 12:33:09,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:33:09,931 INFO L225 Difference]: With dead ends: 5351 [2022-07-22 12:33:09,931 INFO L226 Difference]: Without dead ends: 3480 [2022-07-22 12:33:09,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:33:09,940 INFO L413 NwaCegarLoop]: 926 mSDtfsCounter, 884 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 878 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 3216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 878 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:33:09,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [884 Valid, 1079 Invalid, 3216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [878 Valid, 2338 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-07-22 12:33:09,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2022-07-22 12:33:09,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3479. [2022-07-22 12:33:09,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3479 states, 3478 states have (on average 1.518688901667625) internal successors, (5282), 3478 states have internal predecessors, (5282), 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) [2022-07-22 12:33:10,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3479 states to 3479 states and 5282 transitions. [2022-07-22 12:33:10,003 INFO L78 Accepts]: Start accepts. Automaton has 3479 states and 5282 transitions. Word has length 85 [2022-07-22 12:33:10,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:33:10,008 INFO L495 AbstractCegarLoop]: Abstraction has 3479 states and 5282 transitions. [2022-07-22 12:33:10,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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) [2022-07-22 12:33:10,009 INFO L276 IsEmpty]: Start isEmpty. Operand 3479 states and 5282 transitions. [2022-07-22 12:33:10,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-22 12:33:10,011 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:33:10,012 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:33:10,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 12:33:10,012 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:33:10,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:33:10,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1302816827, now seen corresponding path program 1 times [2022-07-22 12:33:10,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:33:10,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699976178] [2022-07-22 12:33:10,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:33:10,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:33:10,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:33:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:33:10,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:33:10,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699976178] [2022-07-22 12:33:10,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699976178] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:33:10,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:33:10,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:33:10,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097792184] [2022-07-22 12:33:10,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:33:10,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:33:10,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:33:10,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:33:10,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:33:10,080 INFO L87 Difference]: Start difference. First operand 3479 states and 5282 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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) [2022-07-22 12:33:13,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:33:13,283 INFO L93 Difference]: Finished difference Result 10142 states and 15438 transitions. [2022-07-22 12:33:13,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:33:13,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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 87 [2022-07-22 12:33:13,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:33:13,306 INFO L225 Difference]: With dead ends: 10142 [2022-07-22 12:33:13,306 INFO L226 Difference]: Without dead ends: 6665 [2022-07-22 12:33:13,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:33:13,313 INFO L413 NwaCegarLoop]: 744 mSDtfsCounter, 976 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2553 mSolverCounterSat, 772 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 3325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 772 IncrementalHoareTripleChecker+Valid, 2553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:33:13,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 877 Invalid, 3325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [772 Valid, 2553 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-22 12:33:13,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6665 states. [2022-07-22 12:33:13,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6665 to 6657. [2022-07-22 12:33:13,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6657 states, 6656 states have (on average 1.3728966346153846) internal successors, (9138), 6656 states have internal predecessors, (9138), 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) [2022-07-22 12:33:13,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6657 states to 6657 states and 9138 transitions. [2022-07-22 12:33:13,417 INFO L78 Accepts]: Start accepts. Automaton has 6657 states and 9138 transitions. Word has length 87 [2022-07-22 12:33:13,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:33:13,418 INFO L495 AbstractCegarLoop]: Abstraction has 6657 states and 9138 transitions. [2022-07-22 12:33:13,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 2 states have internal predecessors, (87), 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) [2022-07-22 12:33:13,418 INFO L276 IsEmpty]: Start isEmpty. Operand 6657 states and 9138 transitions. [2022-07-22 12:33:13,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-22 12:33:13,423 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:33:13,423 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:33:13,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 12:33:13,423 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:33:13,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:33:13,424 INFO L85 PathProgramCache]: Analyzing trace with hash 2120781558, now seen corresponding path program 1 times [2022-07-22 12:33:13,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:33:13,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028144606] [2022-07-22 12:33:13,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:33:13,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:33:13,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:33:13,551 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:33:13,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:33:13,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028144606] [2022-07-22 12:33:13,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028144606] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:33:13,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:33:13,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:33:13,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238652587] [2022-07-22 12:33:13,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:33:13,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:33:13,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:33:13,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:33:13,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:33:13,554 INFO L87 Difference]: Start difference. First operand 6657 states and 9138 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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) [2022-07-22 12:33:16,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:33:16,550 INFO L93 Difference]: Finished difference Result 19637 states and 26969 transitions. [2022-07-22 12:33:16,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:33:16,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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 93 [2022-07-22 12:33:16,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:33:16,589 INFO L225 Difference]: With dead ends: 19637 [2022-07-22 12:33:16,590 INFO L226 Difference]: Without dead ends: 12982 [2022-07-22 12:33:16,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:33:16,601 INFO L413 NwaCegarLoop]: 1012 mSDtfsCounter, 792 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 2485 mSolverCounterSat, 792 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 792 IncrementalHoareTripleChecker+Valid, 2485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-22 12:33:16,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [792 Valid, 1162 Invalid, 3277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [792 Valid, 2485 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-22 12:33:16,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12982 states. [2022-07-22 12:33:16,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12982 to 12964. [2022-07-22 12:33:16,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12964 states, 12963 states have (on average 1.2390650312427678) internal successors, (16062), 12963 states have internal predecessors, (16062), 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) [2022-07-22 12:33:16,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12964 states to 12964 states and 16062 transitions. [2022-07-22 12:33:16,854 INFO L78 Accepts]: Start accepts. Automaton has 12964 states and 16062 transitions. Word has length 93 [2022-07-22 12:33:16,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:33:16,855 INFO L495 AbstractCegarLoop]: Abstraction has 12964 states and 16062 transitions. [2022-07-22 12:33:16,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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) [2022-07-22 12:33:16,856 INFO L276 IsEmpty]: Start isEmpty. Operand 12964 states and 16062 transitions. [2022-07-22 12:33:16,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-22 12:33:16,858 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:33:16,858 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:33:16,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 12:33:16,859 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:33:16,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:33:16,859 INFO L85 PathProgramCache]: Analyzing trace with hash -841642226, now seen corresponding path program 1 times [2022-07-22 12:33:16,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:33:16,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665860154] [2022-07-22 12:33:16,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:33:16,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:33:16,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:33:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-22 12:33:16,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:33:16,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665860154] [2022-07-22 12:33:16,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665860154] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:33:16,991 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:33:16,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:33:16,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499100697] [2022-07-22 12:33:16,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:33:16,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:33:16,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:33:16,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:33:16,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:33:16,994 INFO L87 Difference]: Start difference. First operand 12964 states and 16062 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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) [2022-07-22 12:33:20,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:33:20,310 INFO L93 Difference]: Finished difference Result 37781 states and 46952 transitions. [2022-07-22 12:33:20,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:33:20,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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 [2022-07-22 12:33:20,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:33:20,353 INFO L225 Difference]: With dead ends: 37781 [2022-07-22 12:33:20,354 INFO L226 Difference]: Without dead ends: 24819 [2022-07-22 12:33:20,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:33:20,369 INFO L413 NwaCegarLoop]: 534 mSDtfsCounter, 914 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 2919 mSolverCounterSat, 531 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 3450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 531 IncrementalHoareTripleChecker+Valid, 2919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:33:20,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [914 Valid, 699 Invalid, 3450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [531 Valid, 2919 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-22 12:33:20,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24819 states. [2022-07-22 12:33:20,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24819 to 24812. [2022-07-22 12:33:20,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24812 states, 24811 states have (on average 1.211962436016283) internal successors, (30070), 24811 states have internal predecessors, (30070), 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) [2022-07-22 12:33:20,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24812 states to 24812 states and 30070 transitions. [2022-07-22 12:33:20,724 INFO L78 Accepts]: Start accepts. Automaton has 24812 states and 30070 transitions. Word has length 109 [2022-07-22 12:33:20,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:33:20,726 INFO L495 AbstractCegarLoop]: Abstraction has 24812 states and 30070 transitions. [2022-07-22 12:33:20,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 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) [2022-07-22 12:33:20,729 INFO L276 IsEmpty]: Start isEmpty. Operand 24812 states and 30070 transitions. [2022-07-22 12:33:20,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-22 12:33:20,730 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:33:20,730 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:33:20,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 12:33:20,732 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:33:20,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:33:20,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1104252474, now seen corresponding path program 1 times [2022-07-22 12:33:20,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:33:20,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470319434] [2022-07-22 12:33:20,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:33:20,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:33:20,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:33:20,895 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:33:20,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:33:20,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470319434] [2022-07-22 12:33:20,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470319434] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:33:20,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:33:20,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:33:20,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149649670] [2022-07-22 12:33:20,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:33:20,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:33:20,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:33:20,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:33:20,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:33:20,899 INFO L87 Difference]: Start difference. First operand 24812 states and 30070 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 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) [2022-07-22 12:33:23,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:33:23,756 INFO L93 Difference]: Finished difference Result 44112 states and 54199 transitions. [2022-07-22 12:33:23,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:33:23,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 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 136 [2022-07-22 12:33:23,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:33:23,807 INFO L225 Difference]: With dead ends: 44112 [2022-07-22 12:33:23,807 INFO L226 Difference]: Without dead ends: 24821 [2022-07-22 12:33:23,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:33:23,836 INFO L413 NwaCegarLoop]: 1027 mSDtfsCounter, 730 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 2713 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 2717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-22 12:33:23,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 1211 Invalid, 2717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2713 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-22 12:33:23,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24821 states. [2022-07-22 12:33:24,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24821 to 24812. [2022-07-22 12:33:24,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24812 states, 24811 states have (on average 1.2105517713917213) internal successors, (30035), 24811 states have internal predecessors, (30035), 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) [2022-07-22 12:33:24,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24812 states to 24812 states and 30035 transitions. [2022-07-22 12:33:24,262 INFO L78 Accepts]: Start accepts. Automaton has 24812 states and 30035 transitions. Word has length 136 [2022-07-22 12:33:24,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:33:24,263 INFO L495 AbstractCegarLoop]: Abstraction has 24812 states and 30035 transitions. [2022-07-22 12:33:24,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 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) [2022-07-22 12:33:24,264 INFO L276 IsEmpty]: Start isEmpty. Operand 24812 states and 30035 transitions. [2022-07-22 12:33:24,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-07-22 12:33:24,267 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:33:24,267 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:33:24,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 12:33:24,268 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:33:24,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:33:24,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1440296515, now seen corresponding path program 1 times [2022-07-22 12:33:24,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:33:24,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904723042] [2022-07-22 12:33:24,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:33:24,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:33:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:33:24,398 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:33:24,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:33:24,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904723042] [2022-07-22 12:33:24,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904723042] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:33:24,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:33:24,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:33:24,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106905552] [2022-07-22 12:33:24,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:33:24,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:33:24,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:33:24,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:33:24,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:33:24,401 INFO L87 Difference]: Start difference. First operand 24812 states and 30035 transitions. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 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) [2022-07-22 12:33:27,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:33:27,567 INFO L93 Difference]: Finished difference Result 70074 states and 85509 transitions. [2022-07-22 12:33:27,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:33:27,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 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 234 [2022-07-22 12:33:27,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:33:27,647 INFO L225 Difference]: With dead ends: 70074 [2022-07-22 12:33:27,647 INFO L226 Difference]: Without dead ends: 45264 [2022-07-22 12:33:27,676 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 [2022-07-22 12:33:27,677 INFO L413 NwaCegarLoop]: 1849 mSDtfsCounter, 840 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 807 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 1987 SdHoareTripleChecker+Invalid, 3286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 807 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-22 12:33:27,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [840 Valid, 1987 Invalid, 3286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [807 Valid, 2479 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-22 12:33:27,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45264 states. [2022-07-22 12:33:28,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45264 to 42893. [2022-07-22 12:33:28,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42893 states, 42892 states have (on average 1.1765830457894246) internal successors, (50466), 42892 states have internal predecessors, (50466), 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) [2022-07-22 12:33:28,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42893 states to 42893 states and 50466 transitions. [2022-07-22 12:33:28,274 INFO L78 Accepts]: Start accepts. Automaton has 42893 states and 50466 transitions. Word has length 234 [2022-07-22 12:33:28,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:33:28,274 INFO L495 AbstractCegarLoop]: Abstraction has 42893 states and 50466 transitions. [2022-07-22 12:33:28,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 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) [2022-07-22 12:33:28,275 INFO L276 IsEmpty]: Start isEmpty. Operand 42893 states and 50466 transitions. [2022-07-22 12:33:28,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-07-22 12:33:28,278 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:33:28,279 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:33:28,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 12:33:28,279 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:33:28,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:33:28,280 INFO L85 PathProgramCache]: Analyzing trace with hash 626390365, now seen corresponding path program 1 times [2022-07-22 12:33:28,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:33:28,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555925163] [2022-07-22 12:33:28,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:33:28,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:33:28,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:33:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-22 12:33:28,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:33:28,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555925163] [2022-07-22 12:33:28,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555925163] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:33:28,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:33:28,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:33:28,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432199050] [2022-07-22 12:33:28,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:33:28,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:33:28,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:33:28,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:33:28,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:33:28,380 INFO L87 Difference]: Start difference. First operand 42893 states and 50466 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 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) [2022-07-22 12:33:31,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:33:31,022 INFO L93 Difference]: Finished difference Result 84997 states and 100133 transitions. [2022-07-22 12:33:31,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:33:31,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 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 249 [2022-07-22 12:33:31,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:33:31,073 INFO L225 Difference]: With dead ends: 84997 [2022-07-22 12:33:31,073 INFO L226 Difference]: Without dead ends: 42893 [2022-07-22 12:33:31,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:33:31,105 INFO L413 NwaCegarLoop]: 1066 mSDtfsCounter, 700 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2503 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 2507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:33:31,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 1195 Invalid, 2507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2503 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 12:33:31,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42893 states. [2022-07-22 12:33:31,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42893 to 42893. [2022-07-22 12:33:31,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42893 states, 42892 states have (on average 1.1764664739345332) internal successors, (50461), 42892 states have internal predecessors, (50461), 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) [2022-07-22 12:33:31,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42893 states to 42893 states and 50461 transitions. [2022-07-22 12:33:31,889 INFO L78 Accepts]: Start accepts. Automaton has 42893 states and 50461 transitions. Word has length 249 [2022-07-22 12:33:31,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:33:31,890 INFO L495 AbstractCegarLoop]: Abstraction has 42893 states and 50461 transitions. [2022-07-22 12:33:31,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 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) [2022-07-22 12:33:31,890 INFO L276 IsEmpty]: Start isEmpty. Operand 42893 states and 50461 transitions. [2022-07-22 12:33:31,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2022-07-22 12:33:31,894 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:33:31,895 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:33:31,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 12:33:31,897 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:33:31,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:33:31,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1004312114, now seen corresponding path program 1 times [2022-07-22 12:33:31,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:33:31,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471017762] [2022-07-22 12:33:31,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:33:31,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:33:31,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:33:32,011 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 240 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 12:33:32,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:33:32,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471017762] [2022-07-22 12:33:32,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471017762] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:33:32,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:33:32,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:33:32,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264403649] [2022-07-22 12:33:32,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:33:32,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:33:32,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:33:32,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:33:32,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:33:32,015 INFO L87 Difference]: Start difference. First operand 42893 states and 50461 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 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) [2022-07-22 12:33:35,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:33:35,441 INFO L93 Difference]: Finished difference Result 104682 states and 125381 transitions. [2022-07-22 12:33:35,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:33:35,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 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 256 [2022-07-22 12:33:35,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:33:35,515 INFO L225 Difference]: With dead ends: 104682 [2022-07-22 12:33:35,515 INFO L226 Difference]: Without dead ends: 62578 [2022-07-22 12:33:35,544 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 [2022-07-22 12:33:35,544 INFO L413 NwaCegarLoop]: 813 mSDtfsCounter, 883 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2386 mSolverCounterSat, 900 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 3286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 900 IncrementalHoareTripleChecker+Valid, 2386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:33:35,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [883 Valid, 930 Invalid, 3286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [900 Valid, 2386 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-22 12:33:35,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62578 states. [2022-07-22 12:33:36,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62578 to 60994. [2022-07-22 12:33:36,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60994 states, 60993 states have (on average 1.1660518420146575) internal successors, (71121), 60993 states have internal predecessors, (71121), 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) [2022-07-22 12:33:36,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60994 states to 60994 states and 71121 transitions. [2022-07-22 12:33:36,277 INFO L78 Accepts]: Start accepts. Automaton has 60994 states and 71121 transitions. Word has length 256 [2022-07-22 12:33:36,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:33:36,280 INFO L495 AbstractCegarLoop]: Abstraction has 60994 states and 71121 transitions. [2022-07-22 12:33:36,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 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) [2022-07-22 12:33:36,281 INFO L276 IsEmpty]: Start isEmpty. Operand 60994 states and 71121 transitions. [2022-07-22 12:33:36,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-07-22 12:33:36,284 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:33:36,284 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:33:36,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 12:33:36,285 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:33:36,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:33:36,286 INFO L85 PathProgramCache]: Analyzing trace with hash -81397391, now seen corresponding path program 1 times [2022-07-22 12:33:36,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:33:36,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699492922] [2022-07-22 12:33:36,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:33:36,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:33:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:33:36,776 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 35 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:33:36,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:33:36,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699492922] [2022-07-22 12:33:36,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699492922] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:33:36,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447989991] [2022-07-22 12:33:36,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:33:36,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:33:36,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:33:36,779 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:33:36,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 12:33:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:33:37,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 12:33:37,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:33:37,093 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-22 12:33:37,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:33:37,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447989991] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:33:37,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:33:37,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-22 12:33:37,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089868955] [2022-07-22 12:33:37,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:33:37,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:33:37,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:33:37,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:33:37,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:33:37,096 INFO L87 Difference]: Start difference. First operand 60994 states and 71121 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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) [2022-07-22 12:33:40,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:33:40,142 INFO L93 Difference]: Finished difference Result 121197 states and 141447 transitions. [2022-07-22 12:33:40,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:33:40,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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 261 [2022-07-22 12:33:40,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:33:40,217 INFO L225 Difference]: With dead ends: 121197 [2022-07-22 12:33:40,217 INFO L226 Difference]: Without dead ends: 60992 [2022-07-22 12:33:40,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:33:40,229 INFO L413 NwaCegarLoop]: 1358 mSDtfsCounter, 1187 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2469 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1187 SdHoareTripleChecker+Valid, 1439 SdHoareTripleChecker+Invalid, 2915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 2469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:33:40,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1187 Valid, 1439 Invalid, 2915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 2469 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-22 12:33:40,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60992 states. [2022-07-22 12:33:40,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60992 to 60991. [2022-07-22 12:33:40,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60991 states, 60990 states have (on average 1.128529267092966) internal successors, (68829), 60990 states have internal predecessors, (68829), 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) [2022-07-22 12:33:40,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60991 states to 60991 states and 68829 transitions. [2022-07-22 12:33:40,967 INFO L78 Accepts]: Start accepts. Automaton has 60991 states and 68829 transitions. Word has length 261 [2022-07-22 12:33:40,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:33:40,967 INFO L495 AbstractCegarLoop]: Abstraction has 60991 states and 68829 transitions. [2022-07-22 12:33:40,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 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) [2022-07-22 12:33:40,968 INFO L276 IsEmpty]: Start isEmpty. Operand 60991 states and 68829 transitions. [2022-07-22 12:33:40,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-07-22 12:33:40,972 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:33:40,973 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:33:40,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 12:33:41,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 12:33:41,192 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:33:41,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:33:41,192 INFO L85 PathProgramCache]: Analyzing trace with hash -256343890, now seen corresponding path program 1 times [2022-07-22 12:33:41,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:33:41,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992633655] [2022-07-22 12:33:41,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:33:41,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:33:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:33:41,341 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-07-22 12:33:41,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:33:41,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992633655] [2022-07-22 12:33:41,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992633655] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:33:41,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:33:41,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:33:41,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045770559] [2022-07-22 12:33:41,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:33:41,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:33:41,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:33:41,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:33:41,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:33:41,344 INFO L87 Difference]: Start difference. First operand 60991 states and 68829 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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) [2022-07-22 12:33:44,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:33:44,880 INFO L93 Difference]: Finished difference Result 140089 states and 159778 transitions. [2022-07-22 12:33:44,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:33:44,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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 311 [2022-07-22 12:33:44,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:33:44,963 INFO L225 Difference]: With dead ends: 140089 [2022-07-22 12:33:44,963 INFO L226 Difference]: Without dead ends: 79887 [2022-07-22 12:33:44,992 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 [2022-07-22 12:33:44,993 INFO L413 NwaCegarLoop]: 1810 mSDtfsCounter, 840 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 722 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 840 SdHoareTripleChecker+Valid, 1953 SdHoareTripleChecker+Invalid, 3276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 722 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:33:44,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [840 Valid, 1953 Invalid, 3276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [722 Valid, 2554 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-22 12:33:45,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79887 states. [2022-07-22 12:33:45,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79887 to 79096. [2022-07-22 12:33:45,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79096 states, 79095 states have (on average 1.1100069536633164) internal successors, (87796), 79095 states have internal predecessors, (87796), 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) [2022-07-22 12:33:45,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79096 states to 79096 states and 87796 transitions. [2022-07-22 12:33:45,898 INFO L78 Accepts]: Start accepts. Automaton has 79096 states and 87796 transitions. Word has length 311 [2022-07-22 12:33:45,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:33:45,898 INFO L495 AbstractCegarLoop]: Abstraction has 79096 states and 87796 transitions. [2022-07-22 12:33:45,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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) [2022-07-22 12:33:45,899 INFO L276 IsEmpty]: Start isEmpty. Operand 79096 states and 87796 transitions. [2022-07-22 12:33:45,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-07-22 12:33:45,902 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:33:45,902 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:33:45,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 12:33:45,903 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:33:45,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:33:45,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1775123547, now seen corresponding path program 1 times [2022-07-22 12:33:45,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:33:45,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219668452] [2022-07-22 12:33:45,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:33:45,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:33:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:33:46,231 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 164 proven. 113 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 12:33:46,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:33:46,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219668452] [2022-07-22 12:33:46,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219668452] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:33:46,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730557721] [2022-07-22 12:33:46,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:33:46,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:33:46,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:33:46,233 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:33:46,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 12:33:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:33:46,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 12:33:46,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:33:46,625 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-22 12:33:46,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:33:46,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730557721] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:33:46,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:33:46,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-22 12:33:46,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387183627] [2022-07-22 12:33:46,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:33:46,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:33:46,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:33:46,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:33:46,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:33:46,628 INFO L87 Difference]: Start difference. First operand 79096 states and 87796 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:33:49,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:33:49,646 INFO L93 Difference]: Finished difference Result 157394 states and 174790 transitions. [2022-07-22 12:33:49,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:33:49,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 326 [2022-07-22 12:33:49,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:33:49,726 INFO L225 Difference]: With dead ends: 157394 [2022-07-22 12:33:49,726 INFO L226 Difference]: Without dead ends: 79087 [2022-07-22 12:33:49,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:33:49,763 INFO L413 NwaCegarLoop]: 684 mSDtfsCounter, 1074 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2393 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1074 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 2920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 2393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:33:49,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1074 Valid, 811 Invalid, 2920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 2393 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-22 12:33:49,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79087 states. [2022-07-22 12:33:50,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79087 to 79086. [2022-07-22 12:33:50,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79086 states, 79085 states have (on average 1.0809002971486374) internal successors, (85483), 79085 states have internal predecessors, (85483), 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) [2022-07-22 12:33:50,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79086 states to 79086 states and 85483 transitions. [2022-07-22 12:33:50,685 INFO L78 Accepts]: Start accepts. Automaton has 79086 states and 85483 transitions. Word has length 326 [2022-07-22 12:33:50,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:33:50,686 INFO L495 AbstractCegarLoop]: Abstraction has 79086 states and 85483 transitions. [2022-07-22 12:33:50,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:33:50,686 INFO L276 IsEmpty]: Start isEmpty. Operand 79086 states and 85483 transitions. [2022-07-22 12:33:50,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2022-07-22 12:33:50,692 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:33:50,692 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:33:50,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 12:33:50,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 12:33:50,897 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:33:50,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:33:50,898 INFO L85 PathProgramCache]: Analyzing trace with hash -22099335, now seen corresponding path program 1 times [2022-07-22 12:33:50,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:33:50,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600551131] [2022-07-22 12:33:50,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:33:50,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:33:50,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:33:51,036 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 426 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-07-22 12:33:51,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:33:51,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600551131] [2022-07-22 12:33:51,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600551131] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:33:51,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:33:51,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:33:51,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307378807] [2022-07-22 12:33:51,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:33:51,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:33:51,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:33:51,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:33:51,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:33:51,040 INFO L87 Difference]: Start difference. First operand 79086 states and 85483 transitions. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 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) [2022-07-22 12:33:57,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:33:57,748 INFO L93 Difference]: Finished difference Result 221341 states and 239937 transitions. [2022-07-22 12:33:57,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:33:57,749 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 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 368 [2022-07-22 12:33:57,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:33:57,900 INFO L225 Difference]: With dead ends: 221341 [2022-07-22 12:33:57,900 INFO L226 Difference]: Without dead ends: 143044 [2022-07-22 12:33:57,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:33:57,947 INFO L413 NwaCegarLoop]: 551 mSDtfsCounter, 1708 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 6620 mSolverCounterSat, 1040 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1708 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 7660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1040 IncrementalHoareTripleChecker+Valid, 6620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:33:57,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1708 Valid, 786 Invalid, 7660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1040 Valid, 6620 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-07-22 12:33:58,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143044 states. [2022-07-22 12:33:59,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143044 to 139766. [2022-07-22 12:33:59,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139766 states, 139765 states have (on average 1.0780524451758309) internal successors, (150674), 139765 states have internal predecessors, (150674), 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) [2022-07-22 12:33:59,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139766 states to 139766 states and 150674 transitions. [2022-07-22 12:33:59,864 INFO L78 Accepts]: Start accepts. Automaton has 139766 states and 150674 transitions. Word has length 368 [2022-07-22 12:33:59,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:33:59,865 INFO L495 AbstractCegarLoop]: Abstraction has 139766 states and 150674 transitions. [2022-07-22 12:33:59,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 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) [2022-07-22 12:33:59,865 INFO L276 IsEmpty]: Start isEmpty. Operand 139766 states and 150674 transitions. [2022-07-22 12:33:59,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2022-07-22 12:33:59,869 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:33:59,869 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:33:59,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 12:33:59,870 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:33:59,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:33:59,870 INFO L85 PathProgramCache]: Analyzing trace with hash -208077102, now seen corresponding path program 1 times [2022-07-22 12:33:59,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:33:59,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323959069] [2022-07-22 12:33:59,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:33:59,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:33:59,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:34:00,166 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 248 proven. 113 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 12:34:00,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:34:00,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323959069] [2022-07-22 12:34:00,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323959069] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:34:00,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950228949] [2022-07-22 12:34:00,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:34:00,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:34:00,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:34:00,169 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:34:00,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 12:34:00,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:34:00,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 12:34:00,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:34:00,433 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 266 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-22 12:34:00,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:34:00,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950228949] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:34:00,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:34:00,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-22 12:34:00,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922000479] [2022-07-22 12:34:00,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:34:00,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:34:00,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:34:00,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:34:00,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:34:00,437 INFO L87 Difference]: Start difference. First operand 139766 states and 150674 transitions. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 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) [2022-07-22 12:34:04,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:34:04,230 INFO L93 Difference]: Finished difference Result 276366 states and 299725 transitions. [2022-07-22 12:34:04,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:34:04,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 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 368 [2022-07-22 12:34:04,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:34:04,419 INFO L225 Difference]: With dead ends: 276366 [2022-07-22 12:34:04,419 INFO L226 Difference]: Without dead ends: 151565 [2022-07-22 12:34:04,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:34:04,483 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 1215 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 2262 mSolverCounterSat, 933 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1215 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 3195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 933 IncrementalHoareTripleChecker+Valid, 2262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-22 12:34:04,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1215 Valid, 405 Invalid, 3195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [933 Valid, 2262 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-22 12:34:04,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151565 states. [2022-07-22 12:34:06,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151565 to 151565. [2022-07-22 12:34:06,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151565 states, 151564 states have (on average 1.0783431421709642) internal successors, (163438), 151564 states have internal predecessors, (163438), 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) [2022-07-22 12:34:06,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151565 states to 151565 states and 163438 transitions. [2022-07-22 12:34:06,270 INFO L78 Accepts]: Start accepts. Automaton has 151565 states and 163438 transitions. Word has length 368 [2022-07-22 12:34:06,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:34:06,271 INFO L495 AbstractCegarLoop]: Abstraction has 151565 states and 163438 transitions. [2022-07-22 12:34:06,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 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) [2022-07-22 12:34:06,271 INFO L276 IsEmpty]: Start isEmpty. Operand 151565 states and 163438 transitions. [2022-07-22 12:34:06,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-07-22 12:34:06,278 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:34:06,278 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:34:06,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-22 12:34:06,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:34:06,485 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:34:06,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:34:06,485 INFO L85 PathProgramCache]: Analyzing trace with hash -426963613, now seen corresponding path program 1 times [2022-07-22 12:34:06,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:34:06,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794769447] [2022-07-22 12:34:06,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:34:06,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:34:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:34:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 333 proven. 113 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-07-22 12:34:06,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:34:06,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794769447] [2022-07-22 12:34:06,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794769447] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:34:06,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684230912] [2022-07-22 12:34:06,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:34:06,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:34:06,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:34:07,112 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:34:07,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 12:34:07,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:34:07,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 12:34:07,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:34:07,341 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2022-07-22 12:34:07,341 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:34:07,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684230912] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:34:07,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:34:07,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-22 12:34:07,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15912706] [2022-07-22 12:34:07,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:34:07,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:34:07,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:34:07,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:34:07,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:34:07,344 INFO L87 Difference]: Start difference. First operand 151565 states and 163438 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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) [2022-07-22 12:34:10,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:34:10,887 INFO L93 Difference]: Finished difference Result 303915 states and 327668 transitions. [2022-07-22 12:34:10,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:34:10,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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 411 [2022-07-22 12:34:10,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:34:11,079 INFO L225 Difference]: With dead ends: 303915 [2022-07-22 12:34:11,079 INFO L226 Difference]: Without dead ends: 153139 [2022-07-22 12:34:11,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:34:11,138 INFO L413 NwaCegarLoop]: 1386 mSDtfsCounter, 1018 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 2481 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1018 SdHoareTripleChecker+Valid, 1470 SdHoareTripleChecker+Invalid, 3080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 2481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:34:11,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1018 Valid, 1470 Invalid, 3080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 2481 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-22 12:34:11,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153139 states. [2022-07-22 12:34:12,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153139 to 151550. [2022-07-22 12:34:12,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151550 states, 151549 states have (on average 1.0654507782961287) internal successors, (161468), 151549 states have internal predecessors, (161468), 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) [2022-07-22 12:34:13,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151550 states to 151550 states and 161468 transitions. [2022-07-22 12:34:13,046 INFO L78 Accepts]: Start accepts. Automaton has 151550 states and 161468 transitions. Word has length 411 [2022-07-22 12:34:13,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:34:13,047 INFO L495 AbstractCegarLoop]: Abstraction has 151550 states and 161468 transitions. [2022-07-22 12:34:13,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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) [2022-07-22 12:34:13,047 INFO L276 IsEmpty]: Start isEmpty. Operand 151550 states and 161468 transitions. [2022-07-22 12:34:13,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2022-07-22 12:34:13,052 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:34:13,052 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:34:13,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 12:34:13,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-22 12:34:13,254 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:34:13,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:34:13,254 INFO L85 PathProgramCache]: Analyzing trace with hash 700384854, now seen corresponding path program 1 times [2022-07-22 12:34:13,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:34:13,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870493053] [2022-07-22 12:34:13,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:34:13,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:34:13,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:34:13,876 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 369 proven. 113 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-07-22 12:34:13,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:34:13,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870493053] [2022-07-22 12:34:13,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870493053] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:34:13,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824759345] [2022-07-22 12:34:13,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:34:13,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:34:13,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:34:13,879 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:34:13,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 12:34:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:34:14,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 12:34:14,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:34:14,139 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-07-22 12:34:14,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:34:14,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824759345] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:34:14,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:34:14,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-22 12:34:14,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005488112] [2022-07-22 12:34:14,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:34:14,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:34:14,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:34:14,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:34:14,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:34:14,142 INFO L87 Difference]: Start difference. First operand 151550 states and 161468 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 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) [2022-07-22 12:34:17,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:34:17,721 INFO L93 Difference]: Finished difference Result 333799 states and 356596 transitions. [2022-07-22 12:34:17,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:34:17,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 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 429 [2022-07-22 12:34:17,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:34:17,927 INFO L225 Difference]: With dead ends: 333799 [2022-07-22 12:34:17,927 INFO L226 Difference]: Without dead ends: 183038 [2022-07-22 12:34:17,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:34:17,996 INFO L413 NwaCegarLoop]: 1641 mSDtfsCounter, 843 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 2493 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 2999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 2493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:34:17,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [843 Valid, 1759 Invalid, 2999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 2493 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-22 12:34:18,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183038 states. [2022-07-22 12:34:19,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183038 to 180667. [2022-07-22 12:34:20,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180667 states, 180666 states have (on average 1.0652142627832575) internal successors, (192448), 180666 states have internal predecessors, (192448), 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) [2022-07-22 12:34:20,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180667 states to 180667 states and 192448 transitions. [2022-07-22 12:34:20,260 INFO L78 Accepts]: Start accepts. Automaton has 180667 states and 192448 transitions. Word has length 429 [2022-07-22 12:34:20,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:34:20,260 INFO L495 AbstractCegarLoop]: Abstraction has 180667 states and 192448 transitions. [2022-07-22 12:34:20,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 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) [2022-07-22 12:34:20,260 INFO L276 IsEmpty]: Start isEmpty. Operand 180667 states and 192448 transitions. [2022-07-22 12:34:20,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2022-07-22 12:34:20,266 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:34:20,266 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:34:20,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 12:34:20,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 12:34:20,467 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:34:20,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:34:20,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1720056613, now seen corresponding path program 1 times [2022-07-22 12:34:20,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:34:20,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087318345] [2022-07-22 12:34:20,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:34:20,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:34:20,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:34:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 569 trivial. 0 not checked. [2022-07-22 12:34:21,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:34:21,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087318345] [2022-07-22 12:34:21,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087318345] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:34:21,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:34:21,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 12:34:21,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279563003] [2022-07-22 12:34:21,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:34:21,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:34:21,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:34:21,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:34:21,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:34:21,116 INFO L87 Difference]: Start difference. First operand 180667 states and 192448 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 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) [2022-07-22 12:34:28,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:34:28,044 INFO L93 Difference]: Finished difference Result 428350 states and 456201 transitions. [2022-07-22 12:34:28,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:34:28,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 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 451 [2022-07-22 12:34:28,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:34:28,719 INFO L225 Difference]: With dead ends: 428350 [2022-07-22 12:34:28,719 INFO L226 Difference]: Without dead ends: 248472 [2022-07-22 12:34:28,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:34:28,835 INFO L413 NwaCegarLoop]: 1473 mSDtfsCounter, 1766 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 7780 mSolverCounterSat, 811 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1766 SdHoareTripleChecker+Valid, 1719 SdHoareTripleChecker+Invalid, 8591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 811 IncrementalHoareTripleChecker+Valid, 7780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:34:28,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1766 Valid, 1719 Invalid, 8591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [811 Valid, 7780 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-07-22 12:34:29,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248472 states. [2022-07-22 12:34:31,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248472 to 240501. [2022-07-22 12:34:31,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240501 states, 240500 states have (on average 1.0622328482328482) internal successors, (255467), 240500 states have internal predecessors, (255467), 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) [2022-07-22 12:34:31,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240501 states to 240501 states and 255467 transitions. [2022-07-22 12:34:31,703 INFO L78 Accepts]: Start accepts. Automaton has 240501 states and 255467 transitions. Word has length 451 [2022-07-22 12:34:31,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:34:31,703 INFO L495 AbstractCegarLoop]: Abstraction has 240501 states and 255467 transitions. [2022-07-22 12:34:31,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 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) [2022-07-22 12:34:31,704 INFO L276 IsEmpty]: Start isEmpty. Operand 240501 states and 255467 transitions. [2022-07-22 12:34:31,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2022-07-22 12:34:31,711 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:34:31,711 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:34:31,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 12:34:31,712 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:34:31,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:34:31,712 INFO L85 PathProgramCache]: Analyzing trace with hash 565386969, now seen corresponding path program 1 times [2022-07-22 12:34:31,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:34:31,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157227022] [2022-07-22 12:34:31,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:34:31,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:34:32,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:34:32,540 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 437 proven. 113 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-22 12:34:32,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:34:32,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157227022] [2022-07-22 12:34:32,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157227022] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:34:32,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481448733] [2022-07-22 12:34:32,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:34:32,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:34:32,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:34:32,544 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:34:32,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 12:34:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:34:32,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 12:34:32,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:34:32,713 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2022-07-22 12:34:32,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:34:32,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481448733] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:34:32,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:34:32,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-22 12:34:32,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963099586] [2022-07-22 12:34:32,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:34:32,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:34:32,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:34:32,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:34:32,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:34:32,716 INFO L87 Difference]: Start difference. First operand 240501 states and 255467 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 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)