./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label11.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa --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 7c2a5ace26f36583b09a306c2edaa0573f422d931cc3959f8aefc935152706cf --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:09:34,677 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:09:34,678 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:09:34,707 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:09:34,708 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:09:34,709 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:09:34,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:09:34,712 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:09:34,714 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:09:34,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:09:34,716 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:09:34,717 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:09:34,717 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:09:34,718 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:09:34,719 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:09:34,720 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:09:34,721 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:09:34,722 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:09:34,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:09:34,725 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:09:34,727 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:09:34,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:09:34,729 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:09:34,730 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:09:34,733 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:09:34,733 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:09:34,733 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:09:34,734 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:09:34,735 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:09:34,736 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:09:34,736 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:09:34,737 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:09:34,737 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:09:34,738 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:09:34,739 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:09:34,739 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:09:34,739 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:09:34,740 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:09:34,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:09:34,740 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:09:34,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:09:34,742 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 17:09:34,760 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:09:34,760 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:09:34,760 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:09:34,761 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:09:34,761 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:09:34,761 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:09:34,762 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:09:34,762 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:09:34,762 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:09:34,762 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:09:34,762 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:09:34,762 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:09:34,762 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:09:34,763 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:09:34,763 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:09:34,763 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:09:34,763 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:09:34,763 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:09:34,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:09:34,763 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:09:34,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:09:34,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:09:34,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:09:34,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:09:34,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:09:34,764 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:09:34,764 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:09:34,764 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:09:34,765 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:09:34,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:09:34,765 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:09:34,765 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:09:34,765 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:09:34,765 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:09:34,765 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c2a5ace26f36583b09a306c2edaa0573f422d931cc3959f8aefc935152706cf [2021-12-06 17:09:34,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:09:34,964 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:09:34,966 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:09:34,966 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:09:34,967 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:09:34,968 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/eca-rers2012/Problem12_label11.c [2021-12-06 17:09:35,014 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/data/2a9306113/352148f2694e4ec0b11df41bef04808b/FLAG64b386b75 [2021-12-06 17:09:35,591 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:09:35,591 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/sv-benchmarks/c/eca-rers2012/Problem12_label11.c [2021-12-06 17:09:35,610 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/data/2a9306113/352148f2694e4ec0b11df41bef04808b/FLAG64b386b75 [2021-12-06 17:09:36,045 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/data/2a9306113/352148f2694e4ec0b11df41bef04808b [2021-12-06 17:09:36,047 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:09:36,048 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:09:36,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:09:36,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:09:36,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:09:36,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:09:36" (1/1) ... [2021-12-06 17:09:36,055 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a1cf6a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:09:36, skipping insertion in model container [2021-12-06 17:09:36,055 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:09:36" (1/1) ... [2021-12-06 17:09:36,063 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:09:36,185 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:09:36,339 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/sv-benchmarks/c/eca-rers2012/Problem12_label11.c[5009,5022] [2021-12-06 17:09:36,889 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:09:36,895 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:09:36,912 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/sv-benchmarks/c/eca-rers2012/Problem12_label11.c[5009,5022] [2021-12-06 17:09:37,323 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:09:37,342 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:09:37,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:09:37 WrapperNode [2021-12-06 17:09:37,342 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:09:37,343 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:09:37,343 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:09:37,343 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:09:37,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:09:37" (1/1) ... [2021-12-06 17:09:37,400 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:09:37" (1/1) ... [2021-12-06 17:09:37,606 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-12-06 17:09:37,606 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:09:37,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:09:37,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:09:37,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:09:37,613 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:09:37" (1/1) ... [2021-12-06 17:09:37,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:09:37" (1/1) ... [2021-12-06 17:09:37,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:09:37" (1/1) ... [2021-12-06 17:09:37,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:09:37" (1/1) ... [2021-12-06 17:09:37,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:09:37" (1/1) ... [2021-12-06 17:09:37,815 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:09:37" (1/1) ... [2021-12-06 17:09:37,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:09:37" (1/1) ... [2021-12-06 17:09:37,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:09:37,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:09:37,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:09:37,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:09:37,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:09:37" (1/1) ... [2021-12-06 17:09:37,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:09:37,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:09:37,982 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:09:37,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:09:38,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:09:38,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:09:38,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:09:38,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:09:38,081 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:09:38,082 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:09:40,791 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:09:40,807 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:09:40,807 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 17:09:40,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:09:40 BoogieIcfgContainer [2021-12-06 17:09:40,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:09:40,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:09:40,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:09:40,813 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:09:40,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:09:36" (1/3) ... [2021-12-06 17:09:40,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36b4fe95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:09:40, skipping insertion in model container [2021-12-06 17:09:40,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:09:37" (2/3) ... [2021-12-06 17:09:40,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36b4fe95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:09:40, skipping insertion in model container [2021-12-06 17:09:40,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:09:40" (3/3) ... [2021-12-06 17:09:40,816 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label11.c [2021-12-06 17:09:40,819 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:09:40,819 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 17:09:40,859 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:09:40,864 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 17:09:40,864 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 17:09:40,888 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:09:40,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-06 17:09:40,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:09:40,893 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:09:40,894 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:09:40,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:09:40,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1453294289, now seen corresponding path program 1 times [2021-12-06 17:09:40,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:09:40,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425731907] [2021-12-06 17:09:40,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:09:40,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:09:40,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:09:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:09:41,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:09:41,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425731907] [2021-12-06 17:09:41,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425731907] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:09:41,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:09:41,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:09:41,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400286575] [2021-12-06 17:09:41,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:09:41,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:09:41,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:09:41,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:09:41,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:09:41,100 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 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 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:09:43,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:09:43,686 INFO L93 Difference]: Finished difference Result 2388 states and 4629 transitions. [2021-12-06 17:09:43,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:09:43,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 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 39 [2021-12-06 17:09:43,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:09:43,706 INFO L225 Difference]: With dead ends: 2388 [2021-12-06 17:09:43,707 INFO L226 Difference]: Without dead ends: 1506 [2021-12-06 17:09:43,711 INFO L932 BasicCegarLoop]: 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 [2021-12-06 17:09:43,714 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 797 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2500 mSolverCounterSat, 764 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 3264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 764 IncrementalHoareTripleChecker+Valid, 2500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-06 17:09:43,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [797 Valid, 112 Invalid, 3264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [764 Valid, 2500 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-06 17:09:43,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-12-06 17:09:43,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2021-12-06 17:09:43,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.86578073089701) internal successors, (2808), 1505 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:09:43,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2808 transitions. [2021-12-06 17:09:43,799 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2808 transitions. Word has length 39 [2021-12-06 17:09:43,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:09:43,800 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2808 transitions. [2021-12-06 17:09:43,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:09:43,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2808 transitions. [2021-12-06 17:09:43,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-06 17:09:43,804 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:09:43,804 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 17:09:43,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:09:43,804 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:09:43,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:09:43,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1028899956, now seen corresponding path program 1 times [2021-12-06 17:09:43,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:09:43,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372648751] [2021-12-06 17:09:43,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:09:43,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:09:43,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:09:43,949 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:09:43,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:09:43,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372648751] [2021-12-06 17:09:43,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372648751] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:09:43,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:09:43,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:09:43,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330900025] [2021-12-06 17:09:43,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:09:43,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:09:43,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:09:43,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:09:43,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:09:43,952 INFO L87 Difference]: Start difference. First operand 1506 states and 2808 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:09:47,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:09:47,646 INFO L93 Difference]: Finished difference Result 5271 states and 9796 transitions. [2021-12-06 17:09:47,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:09:47,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 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 104 [2021-12-06 17:09:47,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:09:47,662 INFO L225 Difference]: With dead ends: 5271 [2021-12-06 17:09:47,662 INFO L226 Difference]: Without dead ends: 3767 [2021-12-06 17:09:47,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:09:47,665 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 2305 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3612 mSolverCounterSat, 1534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2305 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 5146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1534 IncrementalHoareTripleChecker+Valid, 3612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:09:47,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2305 Valid, 199 Invalid, 5146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1534 Valid, 3612 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2021-12-06 17:09:47,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3767 states. [2021-12-06 17:09:47,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3767 to 3759. [2021-12-06 17:09:47,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 1.6053751995742416) internal successors, (6033), 3758 states have internal predecessors, (6033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:09:47,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 6033 transitions. [2021-12-06 17:09:47,729 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 6033 transitions. Word has length 104 [2021-12-06 17:09:47,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:09:47,730 INFO L470 AbstractCegarLoop]: Abstraction has 3759 states and 6033 transitions. [2021-12-06 17:09:47,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:09:47,730 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 6033 transitions. [2021-12-06 17:09:47,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-12-06 17:09:47,734 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:09:47,735 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:09:47,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 17:09:47,735 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:09:47,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:09:47,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1954930215, now seen corresponding path program 1 times [2021-12-06 17:09:47,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:09:47,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777588891] [2021-12-06 17:09:47,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:09:47,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:09:47,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:09:47,873 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:09:47,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:09:47,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777588891] [2021-12-06 17:09:47,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777588891] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:09:47,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:09:47,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:09:47,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560324370] [2021-12-06 17:09:47,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:09:47,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:09:47,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:09:47,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:09:47,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:09:47,875 INFO L87 Difference]: Start difference. First operand 3759 states and 6033 transitions. Second operand has 4 states, 4 states have (on average 49.5) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:09:50,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:09:50,973 INFO L93 Difference]: Finished difference Result 10559 states and 17375 transitions. [2021-12-06 17:09:50,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:09:50,974 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.5) internal successors, (198), 3 states have internal predecessors, (198), 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 200 [2021-12-06 17:09:50,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:09:51,000 INFO L225 Difference]: With dead ends: 10559 [2021-12-06 17:09:51,000 INFO L226 Difference]: Without dead ends: 6765 [2021-12-06 17:09:51,003 INFO L932 BasicCegarLoop]: 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 [2021-12-06 17:09:51,004 INFO L933 BasicCegarLoop]: 695 mSDtfsCounter, 692 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 3806 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 4469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 3806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:09:51,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [692 Valid, 714 Invalid, 4469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [663 Valid, 3806 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-06 17:09:51,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6765 states. [2021-12-06 17:09:51,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6765 to 6763. [2021-12-06 17:09:51,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 6762 states have (on average 1.3571428571428572) internal successors, (9177), 6762 states have internal predecessors, (9177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:09:51,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 9177 transitions. [2021-12-06 17:09:51,118 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 9177 transitions. Word has length 200 [2021-12-06 17:09:51,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:09:51,118 INFO L470 AbstractCegarLoop]: Abstraction has 6763 states and 9177 transitions. [2021-12-06 17:09:51,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.5) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:09:51,119 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 9177 transitions. [2021-12-06 17:09:51,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-12-06 17:09:51,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:09:51,122 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-06 17:09:51,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 17:09:51,122 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:09:51,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:09:51,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1172604746, now seen corresponding path program 1 times [2021-12-06 17:09:51,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:09:51,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75312553] [2021-12-06 17:09:51,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:09:51,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:09:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:09:51,241 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-06 17:09:51,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:09:51,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75312553] [2021-12-06 17:09:51,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75312553] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:09:51,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:09:51,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:09:51,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893503227] [2021-12-06 17:09:51,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:09:51,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:09:51,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:09:51,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:09:51,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:09:51,244 INFO L87 Difference]: Start difference. First operand 6763 states and 9177 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:09:53,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:09:53,515 INFO L93 Difference]: Finished difference Result 16530 states and 23478 transitions. [2021-12-06 17:09:53,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:09:53,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 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 270 [2021-12-06 17:09:53,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:09:53,550 INFO L225 Difference]: With dead ends: 16530 [2021-12-06 17:09:53,550 INFO L226 Difference]: Without dead ends: 9769 [2021-12-06 17:09:53,555 INFO L932 BasicCegarLoop]: 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 [2021-12-06 17:09:53,556 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 848 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2343 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 2809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 2343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:09:53,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 390 Invalid, 2809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 2343 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:09:53,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9769 states. [2021-12-06 17:09:53,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9769 to 9767. [2021-12-06 17:09:53,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.3653491705918492) internal successors, (13334), 9766 states have internal predecessors, (13334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:09:53,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 13334 transitions. [2021-12-06 17:09:53,696 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 13334 transitions. Word has length 270 [2021-12-06 17:09:53,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:09:53,697 INFO L470 AbstractCegarLoop]: Abstraction has 9767 states and 13334 transitions. [2021-12-06 17:09:53,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:09:53,697 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 13334 transitions. [2021-12-06 17:09:53,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2021-12-06 17:09:53,701 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:09:53,701 INFO L514 BasicCegarLoop]: trace histogram [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, 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] [2021-12-06 17:09:53,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 17:09:53,702 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:09:53,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:09:53,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1696081658, now seen corresponding path program 1 times [2021-12-06 17:09:53,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:09:53,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287316952] [2021-12-06 17:09:53,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:09:53,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:09:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:09:53,810 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-06 17:09:53,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:09:53,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287316952] [2021-12-06 17:09:53,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287316952] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:09:53,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:09:53,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:09:53,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409915049] [2021-12-06 17:09:53,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:09:53,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:09:53,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:09:53,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:09:53,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:09:53,812 INFO L87 Difference]: Start difference. First operand 9767 states and 13334 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:09:55,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:09:55,869 INFO L93 Difference]: Finished difference Result 27042 states and 37585 transitions. [2021-12-06 17:09:55,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:09:55,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 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 302 [2021-12-06 17:09:55,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:09:55,903 INFO L225 Difference]: With dead ends: 27042 [2021-12-06 17:09:55,903 INFO L226 Difference]: Without dead ends: 17277 [2021-12-06 17:09:55,910 INFO L932 BasicCegarLoop]: 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 [2021-12-06 17:09:55,911 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 697 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1973 mSolverCounterSat, 860 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 2833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 860 IncrementalHoareTripleChecker+Valid, 1973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:09:55,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 427 Invalid, 2833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [860 Valid, 1973 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-06 17:09:55,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17277 states. [2021-12-06 17:09:56,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17277 to 15775. [2021-12-06 17:09:56,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15775 states, 15774 states have (on average 1.2816026372511728) internal successors, (20216), 15774 states have internal predecessors, (20216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:09:56,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15775 states to 15775 states and 20216 transitions. [2021-12-06 17:09:56,089 INFO L78 Accepts]: Start accepts. Automaton has 15775 states and 20216 transitions. Word has length 302 [2021-12-06 17:09:56,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:09:56,089 INFO L470 AbstractCegarLoop]: Abstraction has 15775 states and 20216 transitions. [2021-12-06 17:09:56,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:09:56,090 INFO L276 IsEmpty]: Start isEmpty. Operand 15775 states and 20216 transitions. [2021-12-06 17:09:56,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2021-12-06 17:09:56,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:09:56,096 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:09:56,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 17:09:56,097 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:09:56,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:09:56,097 INFO L85 PathProgramCache]: Analyzing trace with hash -430593398, now seen corresponding path program 1 times [2021-12-06 17:09:56,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:09:56,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801612155] [2021-12-06 17:09:56,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:09:56,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:09:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:09:56,264 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-06 17:09:56,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:09:56,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801612155] [2021-12-06 17:09:56,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801612155] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:09:56,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:09:56,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:09:56,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806692658] [2021-12-06 17:09:56,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:09:56,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:09:56,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:09:56,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:09:56,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:09:56,266 INFO L87 Difference]: Start difference. First operand 15775 states and 20216 transitions. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:09:58,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:09:58,534 INFO L93 Difference]: Finished difference Result 39809 states and 52170 transitions. [2021-12-06 17:09:58,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:09:58,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 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 381 [2021-12-06 17:09:58,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:09:58,563 INFO L225 Difference]: With dead ends: 39809 [2021-12-06 17:09:58,563 INFO L226 Difference]: Without dead ends: 24036 [2021-12-06 17:09:58,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:09:58,575 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 776 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2037 mSolverCounterSat, 1093 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 3130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1093 IncrementalHoareTripleChecker+Valid, 2037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:09:58,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [776 Valid, 142 Invalid, 3130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1093 Valid, 2037 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:09:58,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24036 states. [2021-12-06 17:09:58,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24036 to 23285. [2021-12-06 17:09:58,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23285 states, 23284 states have (on average 1.3032554543892803) internal successors, (30345), 23284 states have internal predecessors, (30345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:09:58,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23285 states to 23285 states and 30345 transitions. [2021-12-06 17:09:58,835 INFO L78 Accepts]: Start accepts. Automaton has 23285 states and 30345 transitions. Word has length 381 [2021-12-06 17:09:58,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:09:58,836 INFO L470 AbstractCegarLoop]: Abstraction has 23285 states and 30345 transitions. [2021-12-06 17:09:58,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:09:58,836 INFO L276 IsEmpty]: Start isEmpty. Operand 23285 states and 30345 transitions. [2021-12-06 17:09:58,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2021-12-06 17:09:58,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:09:58,843 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-06 17:09:58,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 17:09:58,843 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:09:58,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:09:58,843 INFO L85 PathProgramCache]: Analyzing trace with hash -144734893, now seen corresponding path program 1 times [2021-12-06 17:09:58,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:09:58,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119208291] [2021-12-06 17:09:58,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:09:58,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:09:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:09:58,944 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 451 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-12-06 17:09:58,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:09:58,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119208291] [2021-12-06 17:09:58,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119208291] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:09:58,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:09:58,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:09:58,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931470808] [2021-12-06 17:09:58,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:09:58,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:09:58,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:09:58,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:09:58,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:09:58,946 INFO L87 Difference]: Start difference. First operand 23285 states and 30345 transitions. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:01,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:10:01,226 INFO L93 Difference]: Finished difference Result 57082 states and 74478 transitions. [2021-12-06 17:10:01,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:10:01,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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 398 [2021-12-06 17:10:01,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:10:01,285 INFO L225 Difference]: With dead ends: 57082 [2021-12-06 17:10:01,285 INFO L226 Difference]: Without dead ends: 33799 [2021-12-06 17:10:01,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:10:01,302 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 734 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2271 mSolverCounterSat, 758 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 3029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 758 IncrementalHoareTripleChecker+Valid, 2271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:10:01,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [734 Valid, 217 Invalid, 3029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [758 Valid, 2271 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 17:10:01,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33799 states. [2021-12-06 17:10:01,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33799 to 33048. [2021-12-06 17:10:01,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33048 states, 33047 states have (on average 1.290797954428541) internal successors, (42657), 33047 states have internal predecessors, (42657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:01,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33048 states to 33048 states and 42657 transitions. [2021-12-06 17:10:01,616 INFO L78 Accepts]: Start accepts. Automaton has 33048 states and 42657 transitions. Word has length 398 [2021-12-06 17:10:01,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:10:01,617 INFO L470 AbstractCegarLoop]: Abstraction has 33048 states and 42657 transitions. [2021-12-06 17:10:01,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:01,617 INFO L276 IsEmpty]: Start isEmpty. Operand 33048 states and 42657 transitions. [2021-12-06 17:10:01,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2021-12-06 17:10:01,623 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:10:01,623 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:10:01,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 17:10:01,623 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:10:01,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:10:01,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1969623213, now seen corresponding path program 1 times [2021-12-06 17:10:01,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:10:01,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091895190] [2021-12-06 17:10:01,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:10:01,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:10:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:10:01,780 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 451 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-12-06 17:10:01,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:10:01,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091895190] [2021-12-06 17:10:01,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091895190] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:10:01,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:10:01,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:10:01,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029059023] [2021-12-06 17:10:01,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:10:01,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:10:01,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:10:01,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:10:01,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:10:01,782 INFO L87 Difference]: Start difference. First operand 33048 states and 42657 transitions. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:04,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:10:04,315 INFO L93 Difference]: Finished difference Result 89375 states and 116905 transitions. [2021-12-06 17:10:04,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:10:04,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 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 409 [2021-12-06 17:10:04,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:10:04,394 INFO L225 Difference]: With dead ends: 89375 [2021-12-06 17:10:04,395 INFO L226 Difference]: Without dead ends: 56329 [2021-12-06 17:10:04,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:10:04,409 INFO L933 BasicCegarLoop]: 415 mSDtfsCounter, 720 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2242 mSolverCounterSat, 695 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 2937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 695 IncrementalHoareTripleChecker+Valid, 2242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:10:04,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [720 Valid, 421 Invalid, 2937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [695 Valid, 2242 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:10:04,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56329 states. [2021-12-06 17:10:04,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56329 to 54827. [2021-12-06 17:10:04,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54827 states, 54826 states have (on average 1.2623572757450845) internal successors, (69210), 54826 states have internal predecessors, (69210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:04,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54827 states to 54827 states and 69210 transitions. [2021-12-06 17:10:04,977 INFO L78 Accepts]: Start accepts. Automaton has 54827 states and 69210 transitions. Word has length 409 [2021-12-06 17:10:04,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:10:04,978 INFO L470 AbstractCegarLoop]: Abstraction has 54827 states and 69210 transitions. [2021-12-06 17:10:04,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:04,978 INFO L276 IsEmpty]: Start isEmpty. Operand 54827 states and 69210 transitions. [2021-12-06 17:10:04,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2021-12-06 17:10:04,985 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:10:04,986 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:10:04,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 17:10:04,986 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:10:04,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:10:04,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1831054209, now seen corresponding path program 1 times [2021-12-06 17:10:04,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:10:04,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301875282] [2021-12-06 17:10:04,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:10:04,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:10:05,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:10:05,148 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 348 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-06 17:10:05,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:10:05,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301875282] [2021-12-06 17:10:05,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301875282] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:10:05,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:10:05,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:10:05,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251397895] [2021-12-06 17:10:05,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:10:05,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:10:05,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:10:05,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:10:05,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:10:05,150 INFO L87 Difference]: Start difference. First operand 54827 states and 69210 transitions. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:07,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:10:07,584 INFO L93 Difference]: Finished difference Result 134435 states and 169113 transitions. [2021-12-06 17:10:07,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:10:07,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 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 423 [2021-12-06 17:10:07,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:10:07,673 INFO L225 Difference]: With dead ends: 134435 [2021-12-06 17:10:07,673 INFO L226 Difference]: Without dead ends: 79610 [2021-12-06 17:10:07,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:10:07,699 INFO L933 BasicCegarLoop]: 1331 mSDtfsCounter, 663 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2169 mSolverCounterSat, 532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 1339 SdHoareTripleChecker+Invalid, 2701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 532 IncrementalHoareTripleChecker+Valid, 2169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:10:07,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [663 Valid, 1339 Invalid, 2701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [532 Valid, 2169 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 17:10:07,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79610 states. [2021-12-06 17:10:08,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79610 to 75855. [2021-12-06 17:10:08,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75855 states, 75854 states have (on average 1.2253935191288527) internal successors, (92951), 75854 states have internal predecessors, (92951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:08,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75855 states to 75855 states and 92951 transitions. [2021-12-06 17:10:08,479 INFO L78 Accepts]: Start accepts. Automaton has 75855 states and 92951 transitions. Word has length 423 [2021-12-06 17:10:08,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:10:08,479 INFO L470 AbstractCegarLoop]: Abstraction has 75855 states and 92951 transitions. [2021-12-06 17:10:08,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:08,479 INFO L276 IsEmpty]: Start isEmpty. Operand 75855 states and 92951 transitions. [2021-12-06 17:10:08,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2021-12-06 17:10:08,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:10:08,486 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:10:08,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 17:10:08,487 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:10:08,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:10:08,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1583971455, now seen corresponding path program 1 times [2021-12-06 17:10:08,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:10:08,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829462833] [2021-12-06 17:10:08,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:10:08,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:10:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:10:08,677 INFO L134 CoverageAnalysis]: Checked inductivity of 594 backedges. 341 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-06 17:10:08,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:10:08,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829462833] [2021-12-06 17:10:08,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829462833] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:10:08,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:10:08,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:10:08,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079844122] [2021-12-06 17:10:08,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:10:08,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:10:08,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:10:08,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:10:08,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:10:08,678 INFO L87 Difference]: Start difference. First operand 75855 states and 92951 transitions. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:11,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:10:11,321 INFO L93 Difference]: Finished difference Result 164475 states and 200519 transitions. [2021-12-06 17:10:11,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:10:11,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 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 435 [2021-12-06 17:10:11,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:10:11,420 INFO L225 Difference]: With dead ends: 164475 [2021-12-06 17:10:11,421 INFO L226 Difference]: Without dead ends: 88622 [2021-12-06 17:10:11,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:10:11,463 INFO L933 BasicCegarLoop]: 903 mSDtfsCounter, 805 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2138 mSolverCounterSat, 591 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 2729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 591 IncrementalHoareTripleChecker+Valid, 2138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:10:11,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [805 Valid, 910 Invalid, 2729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [591 Valid, 2138 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:10:11,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88622 states. [2021-12-06 17:10:12,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88622 to 84867. [2021-12-06 17:10:12,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84867 states, 84866 states have (on average 1.180802677161643) internal successors, (100210), 84866 states have internal predecessors, (100210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:12,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84867 states to 84867 states and 100210 transitions. [2021-12-06 17:10:12,394 INFO L78 Accepts]: Start accepts. Automaton has 84867 states and 100210 transitions. Word has length 435 [2021-12-06 17:10:12,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:10:12,395 INFO L470 AbstractCegarLoop]: Abstraction has 84867 states and 100210 transitions. [2021-12-06 17:10:12,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:12,395 INFO L276 IsEmpty]: Start isEmpty. Operand 84867 states and 100210 transitions. [2021-12-06 17:10:12,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2021-12-06 17:10:12,401 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:10:12,401 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:10:12,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 17:10:12,402 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:10:12,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:10:12,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1917863277, now seen corresponding path program 1 times [2021-12-06 17:10:12,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:10:12,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000237229] [2021-12-06 17:10:12,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:10:12,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:10:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:10:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 427 proven. 0 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-12-06 17:10:12,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:10:12,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000237229] [2021-12-06 17:10:12,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000237229] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:10:12,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:10:12,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:10:12,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773468085] [2021-12-06 17:10:12,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:10:12,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:10:12,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:10:12,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:10:12,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:10:12,510 INFO L87 Difference]: Start difference. First operand 84867 states and 100210 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:15,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:10:15,303 INFO L93 Difference]: Finished difference Result 198270 states and 234749 transitions. [2021-12-06 17:10:15,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:10:15,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 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 438 [2021-12-06 17:10:15,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:10:15,428 INFO L225 Difference]: With dead ends: 198270 [2021-12-06 17:10:15,428 INFO L226 Difference]: Without dead ends: 113405 [2021-12-06 17:10:15,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:10:15,468 INFO L933 BasicCegarLoop]: 1259 mSDtfsCounter, 694 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2314 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 1267 SdHoareTripleChecker+Invalid, 2848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 2314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:10:15,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [694 Valid, 1267 Invalid, 2848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 2314 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:10:15,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113405 states. [2021-12-06 17:10:16,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113405 to 102891. [2021-12-06 17:10:16,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102891 states, 102890 states have (on average 1.1585188064923706) internal successors, (119200), 102890 states have internal predecessors, (119200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:16,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102891 states to 102891 states and 119200 transitions. [2021-12-06 17:10:16,950 INFO L78 Accepts]: Start accepts. Automaton has 102891 states and 119200 transitions. Word has length 438 [2021-12-06 17:10:16,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:10:16,951 INFO L470 AbstractCegarLoop]: Abstraction has 102891 states and 119200 transitions. [2021-12-06 17:10:16,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:16,951 INFO L276 IsEmpty]: Start isEmpty. Operand 102891 states and 119200 transitions. [2021-12-06 17:10:16,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2021-12-06 17:10:16,957 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:10:16,957 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:10:16,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 17:10:16,957 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:10:16,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:10:16,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1911564865, now seen corresponding path program 1 times [2021-12-06 17:10:16,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:10:16,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264375684] [2021-12-06 17:10:16,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:10:16,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:10:17,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:10:17,074 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 349 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-06 17:10:17,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:10:17,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264375684] [2021-12-06 17:10:17,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264375684] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:10:17,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:10:17,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:10:17,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819425994] [2021-12-06 17:10:17,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:10:17,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:10:17,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:10:17,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:10:17,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:10:17,075 INFO L87 Difference]: Start difference. First operand 102891 states and 119200 transitions. Second operand has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:19,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:10:19,684 INFO L93 Difference]: Finished difference Result 208033 states and 240666 transitions. [2021-12-06 17:10:19,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:10:19,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 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 479 [2021-12-06 17:10:19,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:10:19,808 INFO L225 Difference]: With dead ends: 208033 [2021-12-06 17:10:19,808 INFO L226 Difference]: Without dead ends: 105144 [2021-12-06 17:10:19,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:10:19,855 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 681 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2229 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 2663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 2229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:10:19,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [681 Valid, 220 Invalid, 2663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 2229 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 17:10:19,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105144 states. [2021-12-06 17:10:20,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105144 to 102140. [2021-12-06 17:10:20,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102140 states, 102139 states have (on average 1.121530463388128) internal successors, (114552), 102139 states have internal predecessors, (114552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:21,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102140 states to 102140 states and 114552 transitions. [2021-12-06 17:10:21,036 INFO L78 Accepts]: Start accepts. Automaton has 102140 states and 114552 transitions. Word has length 479 [2021-12-06 17:10:21,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:10:21,036 INFO L470 AbstractCegarLoop]: Abstraction has 102140 states and 114552 transitions. [2021-12-06 17:10:21,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:21,037 INFO L276 IsEmpty]: Start isEmpty. Operand 102140 states and 114552 transitions. [2021-12-06 17:10:21,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2021-12-06 17:10:21,045 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:10:21,046 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:10:21,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 17:10:21,046 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:10:21,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:10:21,047 INFO L85 PathProgramCache]: Analyzing trace with hash 736788866, now seen corresponding path program 1 times [2021-12-06 17:10:21,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:10:21,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675271370] [2021-12-06 17:10:21,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:10:21,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:10:21,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:10:21,175 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 371 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-06 17:10:21,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:10:21,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675271370] [2021-12-06 17:10:21,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675271370] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:10:21,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:10:21,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:10:21,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188565362] [2021-12-06 17:10:21,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:10:21,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:10:21,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:10:21,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:10:21,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:10:21,177 INFO L87 Difference]: Start difference. First operand 102140 states and 114552 transitions. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:23,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:10:23,720 INFO L93 Difference]: Finished difference Result 204278 states and 229102 transitions. [2021-12-06 17:10:23,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:10:23,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 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 501 [2021-12-06 17:10:23,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:10:23,836 INFO L225 Difference]: With dead ends: 204278 [2021-12-06 17:10:23,836 INFO L226 Difference]: Without dead ends: 102140 [2021-12-06 17:10:23,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:10:23,882 INFO L933 BasicCegarLoop]: 1276 mSDtfsCounter, 567 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2242 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 2635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 2242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:10:23,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 1284 Invalid, 2635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 2242 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-06 17:10:23,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102140 states. [2021-12-06 17:10:24,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102140 to 96132. [2021-12-06 17:10:24,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96132 states, 96131 states have (on average 1.088764290395398) internal successors, (104664), 96131 states have internal predecessors, (104664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:25,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96132 states to 96132 states and 104664 transitions. [2021-12-06 17:10:25,030 INFO L78 Accepts]: Start accepts. Automaton has 96132 states and 104664 transitions. Word has length 501 [2021-12-06 17:10:25,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:10:25,031 INFO L470 AbstractCegarLoop]: Abstraction has 96132 states and 104664 transitions. [2021-12-06 17:10:25,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:25,031 INFO L276 IsEmpty]: Start isEmpty. Operand 96132 states and 104664 transitions. [2021-12-06 17:10:25,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 517 [2021-12-06 17:10:25,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:10:25,042 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:10:25,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 17:10:25,043 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:10:25,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:10:25,043 INFO L85 PathProgramCache]: Analyzing trace with hash 901067136, now seen corresponding path program 1 times [2021-12-06 17:10:25,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:10:25,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659490167] [2021-12-06 17:10:25,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:10:25,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:10:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:10:25,220 INFO L134 CoverageAnalysis]: Checked inductivity of 521 backedges. 386 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-06 17:10:25,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:10:25,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659490167] [2021-12-06 17:10:25,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659490167] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:10:25,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:10:25,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:10:25,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208483541] [2021-12-06 17:10:25,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:10:25,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:10:25,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:10:25,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:10:25,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:10:25,222 INFO L87 Difference]: Start difference. First operand 96132 states and 104664 transitions. Second operand has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:28,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:10:28,087 INFO L93 Difference]: Finished difference Result 226808 states and 248397 transitions. [2021-12-06 17:10:28,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:10:28,087 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 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 516 [2021-12-06 17:10:28,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:10:28,211 INFO L225 Difference]: With dead ends: 226808 [2021-12-06 17:10:28,211 INFO L226 Difference]: Without dead ends: 130678 [2021-12-06 17:10:28,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:10:28,236 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 674 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2180 mSolverCounterSat, 701 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 2881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 701 IncrementalHoareTripleChecker+Valid, 2180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:10:28,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [674 Valid, 117 Invalid, 2881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [701 Valid, 2180 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 17:10:28,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130678 states. [2021-12-06 17:10:29,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130678 to 129176. [2021-12-06 17:10:29,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129176 states, 129175 states have (on average 1.088531062512096) internal successors, (140611), 129175 states have internal predecessors, (140611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:29,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129176 states to 129176 states and 140611 transitions. [2021-12-06 17:10:29,659 INFO L78 Accepts]: Start accepts. Automaton has 129176 states and 140611 transitions. Word has length 516 [2021-12-06 17:10:29,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:10:29,659 INFO L470 AbstractCegarLoop]: Abstraction has 129176 states and 140611 transitions. [2021-12-06 17:10:29,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:29,659 INFO L276 IsEmpty]: Start isEmpty. Operand 129176 states and 140611 transitions. [2021-12-06 17:10:29,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 520 [2021-12-06 17:10:29,667 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:10:29,668 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:10:29,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 17:10:29,668 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:10:29,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:10:29,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1834353811, now seen corresponding path program 1 times [2021-12-06 17:10:29,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:10:29,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128491171] [2021-12-06 17:10:29,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:10:29,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:10:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:10:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2021-12-06 17:10:29,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:10:29,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128491171] [2021-12-06 17:10:29,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128491171] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:10:29,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:10:29,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:10:29,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744831390] [2021-12-06 17:10:29,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:10:29,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:10:29,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:10:29,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:10:29,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:10:29,791 INFO L87 Difference]: Start difference. First operand 129176 states and 140611 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:32,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:10:32,579 INFO L93 Difference]: Finished difference Result 277125 states and 301937 transitions. [2021-12-06 17:10:32,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:10:32,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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 519 [2021-12-06 17:10:32,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:10:32,749 INFO L225 Difference]: With dead ends: 277125 [2021-12-06 17:10:32,749 INFO L226 Difference]: Without dead ends: 147951 [2021-12-06 17:10:32,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:10:32,804 INFO L933 BasicCegarLoop]: 1109 mSDtfsCounter, 835 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2198 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 2600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 2198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:10:32,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 1117 Invalid, 2600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 2198 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-06 17:10:32,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147951 states. [2021-12-06 17:10:34,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147951 to 145698. [2021-12-06 17:10:34,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145698 states, 145697 states have (on average 1.082609799789975) internal successors, (157733), 145697 states have internal predecessors, (157733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:34,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145698 states to 145698 states and 157733 transitions. [2021-12-06 17:10:34,583 INFO L78 Accepts]: Start accepts. Automaton has 145698 states and 157733 transitions. Word has length 519 [2021-12-06 17:10:34,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:10:34,583 INFO L470 AbstractCegarLoop]: Abstraction has 145698 states and 157733 transitions. [2021-12-06 17:10:34,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:34,584 INFO L276 IsEmpty]: Start isEmpty. Operand 145698 states and 157733 transitions. [2021-12-06 17:10:34,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 593 [2021-12-06 17:10:34,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:10:34,596 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:10:34,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 17:10:34,596 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:10:34,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:10:34,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1568793044, now seen corresponding path program 1 times [2021-12-06 17:10:34,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:10:34,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740261716] [2021-12-06 17:10:34,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:10:34,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:10:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:10:34,731 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 738 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2021-12-06 17:10:34,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:10:34,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740261716] [2021-12-06 17:10:34,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740261716] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:10:34,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:10:34,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:10:34,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036264778] [2021-12-06 17:10:34,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:10:34,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:10:34,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:10:34,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:10:34,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:10:34,732 INFO L87 Difference]: Start difference. First operand 145698 states and 157733 transitions. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:37,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:10:37,749 INFO L93 Difference]: Finished difference Result 307916 states and 332767 transitions. [2021-12-06 17:10:37,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:10:37,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 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 592 [2021-12-06 17:10:37,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:10:37,910 INFO L225 Difference]: With dead ends: 307916 [2021-12-06 17:10:37,910 INFO L226 Difference]: Without dead ends: 162220 [2021-12-06 17:10:37,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:10:37,959 INFO L933 BasicCegarLoop]: 1212 mSDtfsCounter, 591 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2405 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 2655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 2405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-06 17:10:37,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [591 Valid, 1220 Invalid, 2655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 2405 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-06 17:10:38,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162220 states. [2021-12-06 17:10:39,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162220 to 158465. [2021-12-06 17:10:39,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158465 states, 158464 states have (on average 1.0735372071890146) internal successors, (170117), 158464 states have internal predecessors, (170117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:39,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158465 states to 158465 states and 170117 transitions. [2021-12-06 17:10:39,747 INFO L78 Accepts]: Start accepts. Automaton has 158465 states and 170117 transitions. Word has length 592 [2021-12-06 17:10:39,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:10:39,748 INFO L470 AbstractCegarLoop]: Abstraction has 158465 states and 170117 transitions. [2021-12-06 17:10:39,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:39,748 INFO L276 IsEmpty]: Start isEmpty. Operand 158465 states and 170117 transitions. [2021-12-06 17:10:39,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 630 [2021-12-06 17:10:39,761 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:10:39,761 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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] [2021-12-06 17:10:39,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 17:10:39,762 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:10:39,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:10:39,762 INFO L85 PathProgramCache]: Analyzing trace with hash 862578827, now seen corresponding path program 1 times [2021-12-06 17:10:39,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:10:39,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016006470] [2021-12-06 17:10:39,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:10:39,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:10:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:10:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 812 proven. 0 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-12-06 17:10:39,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:10:39,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016006470] [2021-12-06 17:10:39,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016006470] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:10:39,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:10:39,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:10:39,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591401935] [2021-12-06 17:10:39,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:10:39,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:10:39,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:10:39,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:10:39,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:10:39,901 INFO L87 Difference]: Start difference. First operand 158465 states and 170117 transitions. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:42,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:10:42,885 INFO L93 Difference]: Finished difference Result 326691 states and 350424 transitions. [2021-12-06 17:10:42,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:10:42,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 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 629 [2021-12-06 17:10:42,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:10:43,062 INFO L225 Difference]: With dead ends: 326691 [2021-12-06 17:10:43,063 INFO L226 Difference]: Without dead ends: 168228 [2021-12-06 17:10:43,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:10:43,125 INFO L933 BasicCegarLoop]: 1292 mSDtfsCounter, 605 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2156 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 2428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 2156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-06 17:10:43,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [605 Valid, 1300 Invalid, 2428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 2156 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-06 17:10:43,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168228 states. [2021-12-06 17:10:44,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168228 to 161469. [2021-12-06 17:10:44,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161469 states, 161468 states have (on average 1.0722248371194292) internal successors, (173130), 161468 states have internal predecessors, (173130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:44,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161469 states to 161469 states and 173130 transitions. [2021-12-06 17:10:44,889 INFO L78 Accepts]: Start accepts. Automaton has 161469 states and 173130 transitions. Word has length 629 [2021-12-06 17:10:44,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:10:44,889 INFO L470 AbstractCegarLoop]: Abstraction has 161469 states and 173130 transitions. [2021-12-06 17:10:44,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:44,890 INFO L276 IsEmpty]: Start isEmpty. Operand 161469 states and 173130 transitions. [2021-12-06 17:10:44,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 649 [2021-12-06 17:10:44,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:10:44,903 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:10:44,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 17:10:44,903 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:10:44,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:10:44,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1196794275, now seen corresponding path program 1 times [2021-12-06 17:10:44,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:10:44,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181681706] [2021-12-06 17:10:44,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:10:44,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:10:45,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:10:45,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 1065 proven. 0 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-06 17:10:45,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:10:45,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181681706] [2021-12-06 17:10:45,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181681706] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:10:45,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:10:45,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:10:45,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008325964] [2021-12-06 17:10:45,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:10:45,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:10:45,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:10:45,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:10:45,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:10:45,215 INFO L87 Difference]: Start difference. First operand 161469 states and 173130 transitions. Second operand has 4 states, 4 states have (on average 125.25) internal successors, (501), 4 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:49,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:10:49,400 INFO L93 Difference]: Finished difference Result 332699 states and 356422 transitions. [2021-12-06 17:10:49,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:10:49,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 125.25) internal successors, (501), 4 states have internal predecessors, (501), 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 648 [2021-12-06 17:10:49,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:10:49,579 INFO L225 Difference]: With dead ends: 332699 [2021-12-06 17:10:49,579 INFO L226 Difference]: Without dead ends: 170481 [2021-12-06 17:10:49,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:10:49,638 INFO L933 BasicCegarLoop]: 1300 mSDtfsCounter, 1307 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5416 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1307 SdHoareTripleChecker+Valid, 1322 SdHoareTripleChecker+Invalid, 5623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 5416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-06 17:10:49,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1307 Valid, 1322 Invalid, 5623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 5416 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-06 17:10:49,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170481 states. [2021-12-06 17:10:51,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170481 to 170481. [2021-12-06 17:10:51,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170481 states, 170480 states have (on average 1.067562177381511) internal successors, (181998), 170480 states have internal predecessors, (181998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:51,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170481 states to 170481 states and 181998 transitions. [2021-12-06 17:10:51,556 INFO L78 Accepts]: Start accepts. Automaton has 170481 states and 181998 transitions. Word has length 648 [2021-12-06 17:10:51,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:10:51,557 INFO L470 AbstractCegarLoop]: Abstraction has 170481 states and 181998 transitions. [2021-12-06 17:10:51,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 125.25) internal successors, (501), 4 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:51,557 INFO L276 IsEmpty]: Start isEmpty. Operand 170481 states and 181998 transitions. [2021-12-06 17:10:51,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 737 [2021-12-06 17:10:51,574 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:10:51,574 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:10:51,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 17:10:51,575 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:10:51,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:10:51,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1877069673, now seen corresponding path program 1 times [2021-12-06 17:10:51,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:10:51,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564827323] [2021-12-06 17:10:51,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:10:51,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:10:51,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:10:51,825 INFO L134 CoverageAnalysis]: Checked inductivity of 844 backedges. 488 proven. 108 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-12-06 17:10:51,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:10:51,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564827323] [2021-12-06 17:10:51,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564827323] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:10:51,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588122477] [2021-12-06 17:10:51,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:10:51,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:10:51,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:10:51,827 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:10:51,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:10:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:10:52,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 17:10:52,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:10:52,528 INFO L134 CoverageAnalysis]: Checked inductivity of 844 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2021-12-06 17:10:52,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:10:52,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588122477] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:10:52,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:10:52,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-06 17:10:52,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321048456] [2021-12-06 17:10:52,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:10:52,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:10:52,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:10:52,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:10:52,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:10:52,531 INFO L87 Difference]: Start difference. First operand 170481 states and 181998 transitions. Second operand has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:55,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:10:55,351 INFO L93 Difference]: Finished difference Result 340960 states and 363994 transitions. [2021-12-06 17:10:55,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:10:55,352 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 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 736 [2021-12-06 17:10:55,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:10:55,538 INFO L225 Difference]: With dead ends: 340960 [2021-12-06 17:10:55,538 INFO L226 Difference]: Without dead ends: 170481 [2021-12-06 17:10:55,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 739 GetRequests, 735 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:10:55,617 INFO L933 BasicCegarLoop]: 990 mSDtfsCounter, 788 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2312 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 2576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 2312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:10:55,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [788 Valid, 998 Invalid, 2576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 2312 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-06 17:10:55,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170481 states. [2021-12-06 17:10:57,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170481 to 165224. [2021-12-06 17:10:57,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165224 states, 165223 states have (on average 1.0577643548416382) internal successors, (174767), 165223 states have internal predecessors, (174767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:57,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165224 states to 165224 states and 174767 transitions. [2021-12-06 17:10:57,484 INFO L78 Accepts]: Start accepts. Automaton has 165224 states and 174767 transitions. Word has length 736 [2021-12-06 17:10:57,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:10:57,484 INFO L470 AbstractCegarLoop]: Abstraction has 165224 states and 174767 transitions. [2021-12-06 17:10:57,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:10:57,484 INFO L276 IsEmpty]: Start isEmpty. Operand 165224 states and 174767 transitions. [2021-12-06 17:10:57,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 912 [2021-12-06 17:10:57,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:10:57,517 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:10:57,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:10:57,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:10:57,720 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:10:57,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:10:57,721 INFO L85 PathProgramCache]: Analyzing trace with hash 964386069, now seen corresponding path program 1 times [2021-12-06 17:10:57,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:10:57,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489973910] [2021-12-06 17:10:57,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:10:57,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:10:57,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:10:57,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 609 proven. 0 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2021-12-06 17:10:57,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:10:57,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489973910] [2021-12-06 17:10:57,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489973910] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:10:57,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:10:57,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:10:57,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755394088] [2021-12-06 17:10:57,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:10:57,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:10:57,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:10:57,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:10:57,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:10:57,991 INFO L87 Difference]: Start difference. First operand 165224 states and 174767 transitions. Second operand has 3 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:11:00,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:11:00,777 INFO L93 Difference]: Finished difference Result 334952 states and 354100 transitions. [2021-12-06 17:11:00,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:11:00,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 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 911 [2021-12-06 17:11:00,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:11:00,943 INFO L225 Difference]: With dead ends: 334952 [2021-12-06 17:11:00,944 INFO L226 Difference]: Without dead ends: 168979 [2021-12-06 17:11:01,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:11:01,001 INFO L933 BasicCegarLoop]: 1010 mSDtfsCounter, 722 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2088 mSolverCounterSat, 536 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 2624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 536 IncrementalHoareTripleChecker+Valid, 2088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:11:01,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [722 Valid, 1017 Invalid, 2624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [536 Valid, 2088 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-06 17:11:01,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168979 states. [2021-12-06 17:11:02,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168979 to 159967. [2021-12-06 17:11:02,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159967 states, 159966 states have (on average 1.0480477101384045) internal successors, (167652), 159966 states have internal predecessors, (167652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:11:02,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159967 states to 159967 states and 167652 transitions. [2021-12-06 17:11:02,788 INFO L78 Accepts]: Start accepts. Automaton has 159967 states and 167652 transitions. Word has length 911 [2021-12-06 17:11:02,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:11:02,789 INFO L470 AbstractCegarLoop]: Abstraction has 159967 states and 167652 transitions. [2021-12-06 17:11:02,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.33333333333334) internal successors, (637), 3 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:11:02,789 INFO L276 IsEmpty]: Start isEmpty. Operand 159967 states and 167652 transitions. [2021-12-06 17:11:02,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 974 [2021-12-06 17:11:02,824 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:11:02,824 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:11:02,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 17:11:02,825 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:11:02,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:02,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1349011674, now seen corresponding path program 1 times [2021-12-06 17:11:02,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:02,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790431538] [2021-12-06 17:11:02,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:02,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:02,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:03,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 143 proven. 4 refuted. 0 times theorem prover too weak. 1036 trivial. 0 not checked. [2021-12-06 17:11:03,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:11:03,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790431538] [2021-12-06 17:11:03,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790431538] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:11:03,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283593893] [2021-12-06 17:11:03,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:03,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:11:03,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:03,249 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:11:03,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 17:11:03,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:03,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 1152 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 17:11:03,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:11:04,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 1036 trivial. 0 not checked. [2021-12-06 17:11:04,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:11:04,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283593893] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:11:04,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:11:04,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-06 17:11:04,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528087921] [2021-12-06 17:11:04,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:11:04,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:11:04,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:11:04,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:11:04,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:11:04,125 INFO L87 Difference]: Start difference. First operand 159967 states and 167652 transitions. Second operand has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:11:06,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:11:06,806 INFO L93 Difference]: Finished difference Result 322185 states and 337572 transitions. [2021-12-06 17:11:06,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:11:06,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 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 973 [2021-12-06 17:11:06,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:11:06,962 INFO L225 Difference]: With dead ends: 322185 [2021-12-06 17:11:06,962 INFO L226 Difference]: Without dead ends: 162971 [2021-12-06 17:11:07,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 976 GetRequests, 972 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:11:07,011 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 830 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2303 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 2662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 2303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:11:07,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [830 Valid, 108 Invalid, 2662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 2303 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-06 17:11:07,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162971 states. [2021-12-06 17:11:08,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162971 to 159967. [2021-12-06 17:11:08,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159967 states, 159966 states have (on average 1.0441718865258867) internal successors, (167032), 159966 states have internal predecessors, (167032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:11:08,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159967 states to 159967 states and 167032 transitions. [2021-12-06 17:11:08,674 INFO L78 Accepts]: Start accepts. Automaton has 159967 states and 167032 transitions. Word has length 973 [2021-12-06 17:11:08,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:11:08,675 INFO L470 AbstractCegarLoop]: Abstraction has 159967 states and 167032 transitions. [2021-12-06 17:11:08,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:11:08,675 INFO L276 IsEmpty]: Start isEmpty. Operand 159967 states and 167032 transitions. [2021-12-06 17:11:08,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1439 [2021-12-06 17:11:08,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:11:08,779 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:11:08,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-06 17:11:08,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:11:08,981 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:11:08,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:08,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1813450025, now seen corresponding path program 1 times [2021-12-06 17:11:08,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:08,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800554427] [2021-12-06 17:11:08,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:08,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:09,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1700 backedges. 1662 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 17:11:09,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:11:09,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800554427] [2021-12-06 17:11:09,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800554427] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:11:09,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:11:09,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:11:09,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069859043] [2021-12-06 17:11:09,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:11:09,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:11:09,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:11:09,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:11:09,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:11:09,573 INFO L87 Difference]: Start difference. First operand 159967 states and 167032 transitions. Second operand has 5 states, 5 states have (on average 280.2) internal successors, (1401), 5 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:11:15,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:11:15,818 INFO L93 Difference]: Finished difference Result 413056 states and 431091 transitions. [2021-12-06 17:11:15,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:11:15,818 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 280.2) internal successors, (1401), 5 states have internal predecessors, (1401), 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 1438 [2021-12-06 17:11:15,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:11:16,092 INFO L225 Difference]: With dead ends: 413056 [2021-12-06 17:11:16,092 INFO L226 Difference]: Without dead ends: 253842 [2021-12-06 17:11:16,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:11:16,153 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 1927 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 6298 mSolverCounterSat, 1321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1927 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 7619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1321 IncrementalHoareTripleChecker+Valid, 6298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:11:16,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1927 Valid, 144 Invalid, 7619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1321 Valid, 6298 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-12-06 17:11:16,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253842 states. [2021-12-06 17:11:18,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253842 to 229059. [2021-12-06 17:11:18,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229059 states, 229058 states have (on average 1.0408018929703393) internal successors, (238404), 229058 states have internal predecessors, (238404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:11:18,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229059 states to 229059 states and 238404 transitions. [2021-12-06 17:11:18,927 INFO L78 Accepts]: Start accepts. Automaton has 229059 states and 238404 transitions. Word has length 1438 [2021-12-06 17:11:18,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:11:18,927 INFO L470 AbstractCegarLoop]: Abstraction has 229059 states and 238404 transitions. [2021-12-06 17:11:18,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 280.2) internal successors, (1401), 5 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:11:18,928 INFO L276 IsEmpty]: Start isEmpty. Operand 229059 states and 238404 transitions. [2021-12-06 17:11:19,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1450 [2021-12-06 17:11:19,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:11:19,043 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:11:19,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 17:11:19,044 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:11:19,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:19,044 INFO L85 PathProgramCache]: Analyzing trace with hash 191628184, now seen corresponding path program 1 times [2021-12-06 17:11:19,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:19,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521753996] [2021-12-06 17:11:19,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:19,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:19,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:19,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 877 proven. 0 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2021-12-06 17:11:19,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:11:19,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521753996] [2021-12-06 17:11:19,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521753996] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:11:19,649 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:11:19,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:11:19,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083280814] [2021-12-06 17:11:19,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:11:19,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:11:19,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:11:19,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:11:19,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:11:19,652 INFO L87 Difference]: Start difference. First operand 229059 states and 238404 transitions. Second operand has 3 states, 3 states have (on average 398.0) internal successors, (1194), 3 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:11:23,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:11:23,430 INFO L93 Difference]: Finished difference Result 496417 states and 516990 transitions. [2021-12-06 17:11:23,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:11:23,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 398.0) internal successors, (1194), 3 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1449 [2021-12-06 17:11:23,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:11:23,805 INFO L225 Difference]: With dead ends: 496417 [2021-12-06 17:11:23,805 INFO L226 Difference]: Without dead ends: 268111 [2021-12-06 17:11:23,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:11:23,848 INFO L933 BasicCegarLoop]: 1028 mSDtfsCounter, 146 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2445 mSolverCounterSat, 487 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 2932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 487 IncrementalHoareTripleChecker+Valid, 2445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:11:23,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 1036 Invalid, 2932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [487 Valid, 2445 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-06 17:11:24,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268111 states. [2021-12-06 17:11:26,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268111 to 262103. [2021-12-06 17:11:26,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262103 states, 262102 states have (on average 1.0401294152658125) internal successors, (272620), 262102 states have internal predecessors, (272620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:11:27,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262103 states to 262103 states and 272620 transitions. [2021-12-06 17:11:27,025 INFO L78 Accepts]: Start accepts. Automaton has 262103 states and 272620 transitions. Word has length 1449 [2021-12-06 17:11:27,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:11:27,026 INFO L470 AbstractCegarLoop]: Abstraction has 262103 states and 272620 transitions. [2021-12-06 17:11:27,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 398.0) internal successors, (1194), 3 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:11:27,026 INFO L276 IsEmpty]: Start isEmpty. Operand 262103 states and 272620 transitions. [2021-12-06 17:11:27,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1478 [2021-12-06 17:11:27,144 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:11:27,145 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:11:27,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 17:11:27,146 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:11:27,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:27,146 INFO L85 PathProgramCache]: Analyzing trace with hash 958422366, now seen corresponding path program 1 times [2021-12-06 17:11:27,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:27,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403095729] [2021-12-06 17:11:27,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:27,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:27,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1274 backedges. 548 proven. 613 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-06 17:11:27,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:11:27,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403095729] [2021-12-06 17:11:27,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403095729] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:11:27,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306238347] [2021-12-06 17:11:27,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:27,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:11:27,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:27,770 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:11:27,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:11:28,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:28,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 1665 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 17:11:28,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:11:33,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1274 backedges. 662 proven. 500 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-06 17:11:33,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:11:37,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1274 backedges. 662 proven. 500 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-12-06 17:11:37,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306238347] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:11:37,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:11:37,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2021-12-06 17:11:37,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635177832] [2021-12-06 17:11:37,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:11:37,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 17:11:37,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:11:37,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 17:11:37,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:11:37,410 INFO L87 Difference]: Start difference. First operand 262103 states and 272620 transitions. Second operand has 11 states, 11 states have (on average 345.72727272727275) internal successors, (3803), 11 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:11:44,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:11:44,308 INFO L93 Difference]: Finished difference Result 808157 states and 839899 transitions. [2021-12-06 17:11:44,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:11:44,309 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 345.72727272727275) internal successors, (3803), 11 states have internal predecessors, (3803), 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 1477 [2021-12-06 17:11:44,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:11:45,179 INFO L225 Difference]: With dead ends: 808157 [2021-12-06 17:11:45,179 INFO L226 Difference]: Without dead ends: 546807 [2021-12-06 17:11:45,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2957 GetRequests, 2910 SyntacticMatches, 38 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:11:45,290 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 661 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 4715 mSolverCounterSat, 1656 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 10076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1656 IncrementalHoareTripleChecker+Valid, 4715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3705 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-06 17:11:45,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [661 Valid, 276 Invalid, 10076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1656 Valid, 4715 Invalid, 0 Unknown, 3705 Unchecked, 4.9s Time] [2021-12-06 17:11:45,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546807 states. [2021-12-06 17:11:50,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546807 to 455319. [2021-12-06 17:11:50,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455319 states, 455318 states have (on average 1.0413095902204612) internal successors, (474127), 455318 states have internal predecessors, (474127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:11:51,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455319 states to 455319 states and 474127 transitions. [2021-12-06 17:11:51,469 INFO L78 Accepts]: Start accepts. Automaton has 455319 states and 474127 transitions. Word has length 1477 [2021-12-06 17:11:51,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:11:51,470 INFO L470 AbstractCegarLoop]: Abstraction has 455319 states and 474127 transitions. [2021-12-06 17:11:51,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 345.72727272727275) internal successors, (3803), 11 states have internal predecessors, (3803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:11:51,471 INFO L276 IsEmpty]: Start isEmpty. Operand 455319 states and 474127 transitions. [2021-12-06 17:11:51,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1679 [2021-12-06 17:11:51,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:11:51,867 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:11:51,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 17:11:52,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:11:52,069 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:11:52,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:52,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1127899358, now seen corresponding path program 1 times [2021-12-06 17:11:52,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:52,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397216816] [2021-12-06 17:11:52,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:52,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 1011 proven. 54 refuted. 0 times theorem prover too weak. 1085 trivial. 0 not checked. [2021-12-06 17:11:52,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:11:52,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397216816] [2021-12-06 17:11:52,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397216816] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:11:52,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723142365] [2021-12-06 17:11:52,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:52,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:11:52,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:52,606 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:11:52,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 17:11:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:53,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 1898 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 17:11:53,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:11:57,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 1144 proven. 0 refuted. 0 times theorem prover too weak. 1006 trivial. 0 not checked. [2021-12-06 17:11:57,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 17:11:57,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723142365] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:11:57,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 17:11:57,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-12-06 17:11:57,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882237066] [2021-12-06 17:11:57,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:11:57,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:11:57,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:11:57,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:11:57,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:11:57,428 INFO L87 Difference]: Start difference. First operand 455319 states and 474127 transitions. Second operand has 4 states, 4 states have (on average 274.75) internal successors, (1099), 4 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:01,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:12:01,713 INFO L93 Difference]: Finished difference Result 534153 states and 555964 transitions. [2021-12-06 17:12:01,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:12:01,713 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 274.75) internal successors, (1099), 4 states have internal predecessors, (1099), 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 1678 [2021-12-06 17:12:01,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:12:02,329 INFO L225 Difference]: With dead ends: 534153 [2021-12-06 17:12:02,329 INFO L226 Difference]: Without dead ends: 534151 [2021-12-06 17:12:02,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1681 GetRequests, 1638 SyntacticMatches, 38 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:12:02,371 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 197 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 2287 mSolverCounterSat, 721 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 4357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 721 IncrementalHoareTripleChecker+Valid, 2287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1349 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:12:02,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 81 Invalid, 4357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [721 Valid, 2287 Invalid, 0 Unknown, 1349 Unchecked, 3.0s Time] [2021-12-06 17:12:02,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534151 states. [2021-12-06 17:12:07,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534151 to 455358. [2021-12-06 17:12:08,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455358 states, 455357 states have (on average 1.0413060521744477) internal successors, (474166), 455357 states have internal predecessors, (474166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:08,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455358 states to 455358 states and 474166 transitions. [2021-12-06 17:12:08,582 INFO L78 Accepts]: Start accepts. Automaton has 455358 states and 474166 transitions. Word has length 1678 [2021-12-06 17:12:08,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:12:08,584 INFO L470 AbstractCegarLoop]: Abstraction has 455358 states and 474166 transitions. [2021-12-06 17:12:08,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 274.75) internal successors, (1099), 4 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:08,584 INFO L276 IsEmpty]: Start isEmpty. Operand 455358 states and 474166 transitions. [2021-12-06 17:12:09,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2229 [2021-12-06 17:12:09,078 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:12:09,079 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:12:09,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 17:12:09,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 17:12:09,281 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:12:09,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:12:09,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1511380970, now seen corresponding path program 1 times [2021-12-06 17:12:09,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:12:09,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603786653] [2021-12-06 17:12:09,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:12:09,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:12:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:12:10,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2748 backedges. 1662 proven. 717 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2021-12-06 17:12:10,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:12:10,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603786653] [2021-12-06 17:12:10,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603786653] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:12:10,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174045128] [2021-12-06 17:12:10,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:12:10,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:12:10,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:12:10,373 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:12:10,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 17:12:10,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:12:10,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 2449 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 17:12:10,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:12:13,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2748 backedges. 1662 proven. 717 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2021-12-06 17:12:13,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:12:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2748 backedges. 1662 proven. 717 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2021-12-06 17:12:16,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174045128] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:12:16,663 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:12:16,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2021-12-06 17:12:16,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907265984] [2021-12-06 17:12:16,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:12:16,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:12:16,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:12:16,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:12:16,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:12:16,669 INFO L87 Difference]: Start difference. First operand 455358 states and 474166 transitions. Second operand has 5 states, 5 states have (on average 394.6) internal successors, (1973), 5 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:24,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:12:24,626 INFO L93 Difference]: Finished difference Result 927731 states and 965853 transitions. [2021-12-06 17:12:24,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 17:12:24,627 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 394.6) internal successors, (1973), 5 states have internal predecessors, (1973), 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 2228 [2021-12-06 17:12:24,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:12:24,628 INFO L225 Difference]: With dead ends: 927731 [2021-12-06 17:12:24,629 INFO L226 Difference]: Without dead ends: 0 [2021-12-06 17:12:24,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4463 GetRequests, 4458 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:12:24,791 INFO L933 BasicCegarLoop]: 825 mSDtfsCounter, 886 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 11072 mSolverCounterSat, 964 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 12036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 964 IncrementalHoareTripleChecker+Valid, 11072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-06 17:12:24,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 872 Invalid, 12036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [964 Valid, 11072 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-12-06 17:12:24,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-06 17:12:24,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-06 17:12:24,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:24,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-06 17:12:24,792 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 2228 [2021-12-06 17:12:24,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:12:24,793 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-06 17:12:24,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 394.6) internal successors, (1973), 5 states have internal predecessors, (1973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:12:24,794 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-06 17:12:24,794 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-06 17:12:24,796 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-06 17:12:24,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 17:12:24,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db3d8d08-4301-41ab-b67b-1d03a27cdc21/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 17:12:25,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-06 17:15:14,057 WARN L227 SmtUtils]: Spent 2.82m on a formula simplification. DAG size of input: 1560 DAG size of output: 1289 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-06 17:19:12,803 WARN L227 SmtUtils]: Spent 3.98m on a formula simplification. DAG size of input: 1752 DAG size of output: 1453 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-06 17:22:36,536 WARN L227 SmtUtils]: Spent 3.40m on a formula simplification. DAG size of input: 1645 DAG size of output: 1359 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)