./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label09.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaf58155-8779-4b2e-b067-59bc4d240ca7/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaf58155-8779-4b2e-b067-59bc4d240ca7/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaf58155-8779-4b2e-b067-59bc4d240ca7/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaf58155-8779-4b2e-b067-59bc4d240ca7/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label09.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaf58155-8779-4b2e-b067-59bc4d240ca7/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaf58155-8779-4b2e-b067-59bc4d240ca7/bin/uautomizer-wIGwrQj20G --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 faa92f3a348dfbe60d7663031fcd6f715676a2874c7581f2c55a3b15e2409056 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:31:27,541 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:31:27,544 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:31:27,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:31:27,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:31:27,586 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:31:27,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:31:27,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:31:27,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:31:27,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:31:27,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:31:27,597 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:31:27,597 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:31:27,599 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:31:27,601 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:31:27,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:31:27,604 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:31:27,605 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:31:27,608 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:31:27,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:31:27,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:31:27,621 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:31:27,623 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:31:27,626 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:31:27,630 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:31:27,634 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:31:27,635 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:31:27,636 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:31:27,637 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:31:27,639 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:31:27,640 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:31:27,641 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:31:27,643 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:31:27,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:31:27,646 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:31:27,646 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:31:27,647 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:31:27,647 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:31:27,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:31:27,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:31:27,649 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:31:27,650 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaf58155-8779-4b2e-b067-59bc4d240ca7/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 12:31:27,683 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:31:27,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:31:27,684 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:31:27,684 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:31:27,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:31:27,685 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:31:27,686 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:31:27,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:31:27,686 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:31:27,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:31:27,686 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:31:27,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:31:27,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 12:31:27,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:31:27,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 12:31:27,687 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:31:27,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 12:31:27,688 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:31:27,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 12:31:27,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:31:27,688 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:31:27,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:31:27,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:31:27,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:31:27,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:31:27,689 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 12:31:27,690 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:31:27,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:31:27,690 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 12:31:27,690 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 12:31:27,690 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 12:31:27,691 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:31:27,691 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_eaf58155-8779-4b2e-b067-59bc4d240ca7/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaf58155-8779-4b2e-b067-59bc4d240ca7/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> faa92f3a348dfbe60d7663031fcd6f715676a2874c7581f2c55a3b15e2409056 [2021-11-23 12:31:27,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:31:28,013 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:31:28,016 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:31:28,017 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:31:28,018 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:31:28,019 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaf58155-8779-4b2e-b067-59bc4d240ca7/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label09.c [2021-11-23 12:31:28,104 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaf58155-8779-4b2e-b067-59bc4d240ca7/bin/uautomizer-wIGwrQj20G/data/bdbba5574/83278e5af4104df29d78fc2c7754454c/FLAG256013b4e [2021-11-23 12:31:28,922 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:31:28,923 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaf58155-8779-4b2e-b067-59bc4d240ca7/sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label09.c [2021-11-23 12:31:28,958 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaf58155-8779-4b2e-b067-59bc4d240ca7/bin/uautomizer-wIGwrQj20G/data/bdbba5574/83278e5af4104df29d78fc2c7754454c/FLAG256013b4e [2021-11-23 12:31:29,415 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaf58155-8779-4b2e-b067-59bc4d240ca7/bin/uautomizer-wIGwrQj20G/data/bdbba5574/83278e5af4104df29d78fc2c7754454c [2021-11-23 12:31:29,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:31:29,421 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:31:29,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:31:29,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:31:29,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:31:29,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:31:29" (1/1) ... [2021-11-23 12:31:29,429 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39db865a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:31:29, skipping insertion in model container [2021-11-23 12:31:29,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:31:29" (1/1) ... [2021-11-23 12:31:29,437 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:31:29,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:31:29,922 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_eaf58155-8779-4b2e-b067-59bc4d240ca7/sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label09.c[15510,15523] [2021-11-23 12:31:29,985 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_eaf58155-8779-4b2e-b067-59bc4d240ca7/sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label09.c[23258,23271] [2021-11-23 12:31:30,905 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:31:30,917 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:31:30,978 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_eaf58155-8779-4b2e-b067-59bc4d240ca7/sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label09.c[15510,15523] [2021-11-23 12:31:30,990 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_eaf58155-8779-4b2e-b067-59bc4d240ca7/sv-benchmarks/c/combinations/pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label09.c[23258,23271] [2021-11-23 12:31:31,550 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:31:31,582 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:31:31,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:31:31 WrapperNode [2021-11-23 12:31:31,583 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:31:31,584 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:31:31,584 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:31:31,584 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:31:31,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:31:31" (1/1) ... [2021-11-23 12:31:31,656 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:31:31" (1/1) ... [2021-11-23 12:31:32,050 INFO L137 Inliner]: procedures = 38, calls = 23, calls flagged for inlining = 18, calls inlined = 18, statements flattened = 5147 [2021-11-23 12:31:32,050 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:31:32,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:31:32,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:31:32,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:31:32,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:31:31" (1/1) ... [2021-11-23 12:31:32,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:31:31" (1/1) ... [2021-11-23 12:31:32,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:31:31" (1/1) ... [2021-11-23 12:31:32,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:31:31" (1/1) ... [2021-11-23 12:31:32,514 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:31:31" (1/1) ... [2021-11-23 12:31:32,580 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:31:31" (1/1) ... [2021-11-23 12:31:32,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:31:31" (1/1) ... [2021-11-23 12:31:32,762 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:31:32,763 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:31:32,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:31:32,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:31:32,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:31:31" (1/1) ... [2021-11-23 12:31:32,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:31:32,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaf58155-8779-4b2e-b067-59bc4d240ca7/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:31:32,812 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaf58155-8779-4b2e-b067-59bc4d240ca7/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:31:32,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eaf58155-8779-4b2e-b067-59bc4d240ca7/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:31:32,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 12:31:32,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 12:31:32,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:31:32,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:31:32,997 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:31:32,999 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:31:37,398 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:31:37,426 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:31:37,426 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 12:31:37,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:31:37 BoogieIcfgContainer [2021-11-23 12:31:37,431 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:31:37,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:31:37,435 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:31:37,438 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:31:37,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:31:29" (1/3) ... [2021-11-23 12:31:37,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64eee7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:31:37, skipping insertion in model container [2021-11-23 12:31:37,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:31:31" (2/3) ... [2021-11-23 12:31:37,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64eee7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:31:37, skipping insertion in model container [2021-11-23 12:31:37,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:31:37" (3/3) ... [2021-11-23 12:31:37,442 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.UNBOUNDED.pals+Problem12_label09.c [2021-11-23 12:31:37,450 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:31:37,451 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 12:31:37,526 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:31:37,536 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 [2021-11-23 12:31:37,536 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 12:31:37,593 INFO L276 IsEmpty]: Start isEmpty. Operand has 928 states, 925 states have (on average 1.8983783783783783) internal successors, (1756), 927 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:37,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 12:31:37,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:31:37,612 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] [2021-11-23 12:31:37,613 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:31:37,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:31:37,619 INFO L85 PathProgramCache]: Analyzing trace with hash -321533933, now seen corresponding path program 1 times [2021-11-23 12:31:37,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:31:37,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808299860] [2021-11-23 12:31:37,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:31:37,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:31:37,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:31:37,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:31:37,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:31:37,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808299860] [2021-11-23 12:31:37,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808299860] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:31:37,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:31:37,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 12:31:37,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593289041] [2021-11-23 12:31:37,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:31:37,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 12:31:37,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:31:37,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 12:31:37,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 12:31:37,935 INFO L87 Difference]: Start difference. First operand has 928 states, 925 states have (on average 1.8983783783783783) internal successors, (1756), 927 states have internal predecessors, (1756), 0 states have call successors, (0), 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 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:38,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:31:38,049 INFO L93 Difference]: Finished difference Result 1808 states and 3422 transitions. [2021-11-23 12:31:38,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 12:31:38,052 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-11-23 12:31:38,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:31:38,084 INFO L225 Difference]: With dead ends: 1808 [2021-11-23 12:31:38,084 INFO L226 Difference]: Without dead ends: 862 [2021-11-23 12:31:38,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 12:31:38,094 INFO L933 BasicCegarLoop]: 1687 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1687 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:31:38,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1687 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:31:38,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-11-23 12:31:38,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 862. [2021-11-23 12:31:38,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 860 states have (on average 1.8872093023255814) internal successors, (1623), 861 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:38,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1623 transitions. [2021-11-23 12:31:38,194 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1623 transitions. Word has length 38 [2021-11-23 12:31:38,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:31:38,195 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 1623 transitions. [2021-11-23 12:31:38,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.0) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:38,196 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1623 transitions. [2021-11-23 12:31:38,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-23 12:31:38,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:31:38,204 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] [2021-11-23 12:31:38,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 12:31:38,205 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:31:38,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:31:38,207 INFO L85 PathProgramCache]: Analyzing trace with hash -46774319, now seen corresponding path program 1 times [2021-11-23 12:31:38,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:31:38,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096229522] [2021-11-23 12:31:38,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:31:38,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:31:38,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:31:38,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:31:38,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:31:38,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096229522] [2021-11-23 12:31:38,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096229522] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:31:38,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:31:38,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:31:38,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426040388] [2021-11-23 12:31:38,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:31:38,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:31:38,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:31:38,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:31:38,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:31:38,557 INFO L87 Difference]: Start difference. First operand 862 states and 1623 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:38,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:31:38,754 INFO L93 Difference]: Finished difference Result 928 states and 1725 transitions. [2021-11-23 12:31:38,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 12:31:38,755 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 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 38 [2021-11-23 12:31:38,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:31:38,761 INFO L225 Difference]: With dead ends: 928 [2021-11-23 12:31:38,761 INFO L226 Difference]: Without dead ends: 862 [2021-11-23 12:31:38,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:31:38,768 INFO L933 BasicCegarLoop]: 1621 mSDtfsCounter, 3 mSDsluCounter, 4820 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6441 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:31:38,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6441 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:31:38,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2021-11-23 12:31:38,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 862. [2021-11-23 12:31:38,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 860 states have (on average 1.8406976744186045) internal successors, (1583), 861 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:38,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1583 transitions. [2021-11-23 12:31:38,800 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1583 transitions. Word has length 38 [2021-11-23 12:31:38,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:31:38,800 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 1583 transitions. [2021-11-23 12:31:38,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:38,801 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1583 transitions. [2021-11-23 12:31:38,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 12:31:38,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:31:38,808 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:31:38,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 12:31:38,811 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:31:38,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:31:38,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1060707035, now seen corresponding path program 1 times [2021-11-23 12:31:38,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:31:38,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417166879] [2021-11-23 12:31:38,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:31:38,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:31:38,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:31:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:31:38,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:31:38,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417166879] [2021-11-23 12:31:38,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417166879] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:31:38,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:31:38,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:31:38,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959971111] [2021-11-23 12:31:38,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:31:38,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 12:31:38,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:31:38,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 12:31:38,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 12:31:38,994 INFO L87 Difference]: Start difference. First operand 862 states and 1583 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:46,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:31:46,383 INFO L93 Difference]: Finished difference Result 3117 states and 5892 transitions. [2021-11-23 12:31:46,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 12:31:46,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-11-23 12:31:46,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:31:46,400 INFO L225 Difference]: With dead ends: 3117 [2021-11-23 12:31:46,401 INFO L226 Difference]: Without dead ends: 2364 [2021-11-23 12:31:46,402 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 [2021-11-23 12:31:46,404 INFO L933 BasicCegarLoop]: 819 mSDtfsCounter, 2459 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5354 mSolverCounterSat, 1161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2459 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 6515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1161 IncrementalHoareTripleChecker+Valid, 5354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:31:46,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2459 Valid, 837 Invalid, 6515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1161 Valid, 5354 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2021-11-23 12:31:46,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2021-11-23 12:31:46,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 2364. [2021-11-23 12:31:46,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2364 states, 2362 states have (on average 1.5651989839119391) internal successors, (3697), 2363 states have internal predecessors, (3697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:46,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 3697 transitions. [2021-11-23 12:31:46,476 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 3697 transitions. Word has length 67 [2021-11-23 12:31:46,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:31:46,477 INFO L470 AbstractCegarLoop]: Abstraction has 2364 states and 3697 transitions. [2021-11-23 12:31:46,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:46,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 3697 transitions. [2021-11-23 12:31:46,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 12:31:46,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:31:46,479 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:31:46,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 12:31:46,479 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:31:46,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:31:46,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1531755293, now seen corresponding path program 1 times [2021-11-23 12:31:46,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:31:46,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693995295] [2021-11-23 12:31:46,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:31:46,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:31:46,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:31:46,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:31:46,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:31:46,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693995295] [2021-11-23 12:31:46,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693995295] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:31:46,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:31:46,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:31:46,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986356987] [2021-11-23 12:31:46,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:31:46,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:31:46,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:31:46,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:31:46,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:31:46,568 INFO L87 Difference]: Start difference. First operand 2364 states and 3697 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:46,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:31:46,627 INFO L93 Difference]: Finished difference Result 2482 states and 3883 transitions. [2021-11-23 12:31:46,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:31:46,628 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-23 12:31:46,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:31:46,645 INFO L225 Difference]: With dead ends: 2482 [2021-11-23 12:31:46,646 INFO L226 Difference]: Without dead ends: 2420 [2021-11-23 12:31:46,647 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 [2021-11-23 12:31:46,656 INFO L933 BasicCegarLoop]: 1651 mSDtfsCounter, 1523 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:31:46,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1523 Valid, 1751 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:31:46,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2021-11-23 12:31:46,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 2418. [2021-11-23 12:31:46,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2416 states have (on average 1.5658112582781456) internal successors, (3783), 2417 states have internal predecessors, (3783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:46,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 3783 transitions. [2021-11-23 12:31:46,728 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 3783 transitions. Word has length 77 [2021-11-23 12:31:46,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:31:46,730 INFO L470 AbstractCegarLoop]: Abstraction has 2418 states and 3783 transitions. [2021-11-23 12:31:46,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:46,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 3783 transitions. [2021-11-23 12:31:46,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 12:31:46,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:31:46,733 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:31:46,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 12:31:46,733 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:31:46,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:31:46,734 INFO L85 PathProgramCache]: Analyzing trace with hash 786172563, now seen corresponding path program 1 times [2021-11-23 12:31:46,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:31:46,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553579654] [2021-11-23 12:31:46,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:31:46,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:31:46,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:31:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:31:46,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:31:46,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553579654] [2021-11-23 12:31:46,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553579654] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:31:46,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:31:46,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:31:46,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537406967] [2021-11-23 12:31:46,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:31:46,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:31:46,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:31:46,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:31:46,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:31:46,848 INFO L87 Difference]: Start difference. First operand 2418 states and 3783 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:46,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:31:46,905 INFO L93 Difference]: Finished difference Result 2638 states and 4131 transitions. [2021-11-23 12:31:46,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:31:46,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-23 12:31:46,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:31:46,923 INFO L225 Difference]: With dead ends: 2638 [2021-11-23 12:31:46,924 INFO L226 Difference]: Without dead ends: 2522 [2021-11-23 12:31:46,925 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 [2021-11-23 12:31:46,926 INFO L933 BasicCegarLoop]: 1646 mSDtfsCounter, 1519 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1519 SdHoareTripleChecker+Valid, 1750 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:31:46,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1519 Valid, 1750 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:31:46,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2522 states. [2021-11-23 12:31:46,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2522 to 2520. [2021-11-23 12:31:46,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2520 states, 2518 states have (on average 1.5663224781572678) internal successors, (3944), 2519 states have internal predecessors, (3944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:47,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2520 states to 2520 states and 3944 transitions. [2021-11-23 12:31:47,068 INFO L78 Accepts]: Start accepts. Automaton has 2520 states and 3944 transitions. Word has length 77 [2021-11-23 12:31:47,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:31:47,070 INFO L470 AbstractCegarLoop]: Abstraction has 2520 states and 3944 transitions. [2021-11-23 12:31:47,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:47,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2520 states and 3944 transitions. [2021-11-23 12:31:47,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 12:31:47,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:31:47,075 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:31:47,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 12:31:47,076 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:31:47,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:31:47,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1153858295, now seen corresponding path program 1 times [2021-11-23 12:31:47,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:31:47,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624291415] [2021-11-23 12:31:47,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:31:47,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:31:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:31:47,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:31:47,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:31:47,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624291415] [2021-11-23 12:31:47,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624291415] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:31:47,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:31:47,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:31:47,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424427808] [2021-11-23 12:31:47,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:31:47,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:31:47,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:31:47,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:31:47,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:31:47,157 INFO L87 Difference]: Start difference. First operand 2520 states and 3944 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:47,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:31:47,221 INFO L93 Difference]: Finished difference Result 2932 states and 4594 transitions. [2021-11-23 12:31:47,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:31:47,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-23 12:31:47,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:31:47,240 INFO L225 Difference]: With dead ends: 2932 [2021-11-23 12:31:47,240 INFO L226 Difference]: Without dead ends: 2714 [2021-11-23 12:31:47,241 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 [2021-11-23 12:31:47,243 INFO L933 BasicCegarLoop]: 1641 mSDtfsCounter, 1515 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1515 SdHoareTripleChecker+Valid, 1749 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:31:47,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1515 Valid, 1749 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:31:47,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2021-11-23 12:31:47,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 2712. [2021-11-23 12:31:47,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2712 states, 2710 states have (on average 1.5660516605166053) internal successors, (4244), 2711 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:47,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2712 states to 2712 states and 4244 transitions. [2021-11-23 12:31:47,329 INFO L78 Accepts]: Start accepts. Automaton has 2712 states and 4244 transitions. Word has length 77 [2021-11-23 12:31:47,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:31:47,330 INFO L470 AbstractCegarLoop]: Abstraction has 2712 states and 4244 transitions. [2021-11-23 12:31:47,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:47,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2712 states and 4244 transitions. [2021-11-23 12:31:47,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 12:31:47,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:31:47,331 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:31:47,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 12:31:47,332 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:31:47,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:31:47,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1546824319, now seen corresponding path program 1 times [2021-11-23 12:31:47,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:31:47,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109469676] [2021-11-23 12:31:47,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:31:47,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:31:47,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:31:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:31:47,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:31:47,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109469676] [2021-11-23 12:31:47,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109469676] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:31:47,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:31:47,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:31:47,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126751796] [2021-11-23 12:31:47,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:31:47,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:31:47,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:31:47,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:31:47,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:31:47,401 INFO L87 Difference]: Start difference. First operand 2712 states and 4244 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:47,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:31:47,464 INFO L93 Difference]: Finished difference Result 3484 states and 5454 transitions. [2021-11-23 12:31:47,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:31:47,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-23 12:31:47,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:31:47,484 INFO L225 Difference]: With dead ends: 3484 [2021-11-23 12:31:47,484 INFO L226 Difference]: Without dead ends: 3074 [2021-11-23 12:31:47,485 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 [2021-11-23 12:31:47,487 INFO L933 BasicCegarLoop]: 1636 mSDtfsCounter, 1511 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1511 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:31:47,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1511 Valid, 1748 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:31:47,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3074 states. [2021-11-23 12:31:47,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3074 to 3072. [2021-11-23 12:31:47,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3072 states, 3070 states have (on average 1.5635179153094463) internal successors, (4800), 3071 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:47,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3072 states to 3072 states and 4800 transitions. [2021-11-23 12:31:47,582 INFO L78 Accepts]: Start accepts. Automaton has 3072 states and 4800 transitions. Word has length 77 [2021-11-23 12:31:47,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:31:47,583 INFO L470 AbstractCegarLoop]: Abstraction has 3072 states and 4800 transitions. [2021-11-23 12:31:47,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:47,584 INFO L276 IsEmpty]: Start isEmpty. Operand 3072 states and 4800 transitions. [2021-11-23 12:31:47,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 12:31:47,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:31:47,590 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:31:47,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 12:31:47,591 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:31:47,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:31:47,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1884617461, now seen corresponding path program 1 times [2021-11-23 12:31:47,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:31:47,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419267641] [2021-11-23 12:31:47,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:31:47,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:31:47,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:31:47,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:31:47,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:31:47,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419267641] [2021-11-23 12:31:47,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419267641] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:31:47,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:31:47,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:31:47,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146731521] [2021-11-23 12:31:47,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:31:47,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:31:47,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:31:47,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:31:47,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:31:47,658 INFO L87 Difference]: Start difference. First operand 3072 states and 4800 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:47,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:31:47,750 INFO L93 Difference]: Finished difference Result 4516 states and 7042 transitions. [2021-11-23 12:31:47,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:31:47,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-23 12:31:47,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:31:47,772 INFO L225 Difference]: With dead ends: 4516 [2021-11-23 12:31:47,773 INFO L226 Difference]: Without dead ends: 3746 [2021-11-23 12:31:47,775 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 [2021-11-23 12:31:47,776 INFO L933 BasicCegarLoop]: 1631 mSDtfsCounter, 1507 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1507 SdHoareTripleChecker+Valid, 1747 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:31:47,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1507 Valid, 1747 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:31:47,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3746 states. [2021-11-23 12:31:47,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3746 to 3744. [2021-11-23 12:31:47,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3744 states, 3742 states have (on average 1.5563869588455372) internal successors, (5824), 3743 states have internal predecessors, (5824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:47,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3744 states to 3744 states and 5824 transitions. [2021-11-23 12:31:47,907 INFO L78 Accepts]: Start accepts. Automaton has 3744 states and 5824 transitions. Word has length 77 [2021-11-23 12:31:47,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:31:47,907 INFO L470 AbstractCegarLoop]: Abstraction has 3744 states and 5824 transitions. [2021-11-23 12:31:47,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:47,908 INFO L276 IsEmpty]: Start isEmpty. Operand 3744 states and 5824 transitions. [2021-11-23 12:31:47,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 12:31:47,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:31:47,909 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:31:47,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 12:31:47,910 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:31:47,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:31:47,910 INFO L85 PathProgramCache]: Analyzing trace with hash -2001711063, now seen corresponding path program 1 times [2021-11-23 12:31:47,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:31:47,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014204049] [2021-11-23 12:31:47,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:31:47,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:31:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:31:48,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:31:48,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:31:48,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014204049] [2021-11-23 12:31:48,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014204049] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:31:48,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:31:48,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 12:31:48,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81244676] [2021-11-23 12:31:48,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:31:48,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:31:48,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:31:48,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:31:48,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:31:48,003 INFO L87 Difference]: Start difference. First operand 3744 states and 5824 transitions. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:49,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:31:49,111 INFO L93 Difference]: Finished difference Result 21048 states and 32524 transitions. [2021-11-23 12:31:49,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 12:31:49,112 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-23 12:31:49,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:31:49,200 INFO L225 Difference]: With dead ends: 21048 [2021-11-23 12:31:49,200 INFO L226 Difference]: Without dead ends: 19606 [2021-11-23 12:31:49,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-11-23 12:31:49,212 INFO L933 BasicCegarLoop]: 1579 mSDtfsCounter, 10553 mSDsluCounter, 1813 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10553 SdHoareTripleChecker+Valid, 3392 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:31:49,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10553 Valid, 3392 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:31:49,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19606 states. [2021-11-23 12:31:49,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19606 to 5184. [2021-11-23 12:31:49,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5184 states, 5182 states have (on average 1.540717869548437) internal successors, (7984), 5183 states have internal predecessors, (7984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:49,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5184 states to 5184 states and 7984 transitions. [2021-11-23 12:31:49,690 INFO L78 Accepts]: Start accepts. Automaton has 5184 states and 7984 transitions. Word has length 77 [2021-11-23 12:31:49,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:31:49,690 INFO L470 AbstractCegarLoop]: Abstraction has 5184 states and 7984 transitions. [2021-11-23 12:31:49,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:49,691 INFO L276 IsEmpty]: Start isEmpty. Operand 5184 states and 7984 transitions. [2021-11-23 12:31:49,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 12:31:49,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:31:49,692 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:31:49,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 12:31:49,693 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:31:49,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:31:49,693 INFO L85 PathProgramCache]: Analyzing trace with hash -914675591, now seen corresponding path program 1 times [2021-11-23 12:31:49,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:31:49,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880277631] [2021-11-23 12:31:49,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:31:49,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:31:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:31:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:31:49,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:31:49,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880277631] [2021-11-23 12:31:49,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880277631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:31:49,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:31:49,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:31:49,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156560461] [2021-11-23 12:31:49,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:31:49,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:31:49,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:31:49,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:31:49,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:31:49,780 INFO L87 Difference]: Start difference. First operand 5184 states and 7984 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:50,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:31:50,156 INFO L93 Difference]: Finished difference Result 10596 states and 16146 transitions. [2021-11-23 12:31:50,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:31:50,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-23 12:31:50,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:31:50,173 INFO L225 Difference]: With dead ends: 10596 [2021-11-23 12:31:50,173 INFO L226 Difference]: Without dead ends: 7714 [2021-11-23 12:31:50,178 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 [2021-11-23 12:31:50,179 INFO L933 BasicCegarLoop]: 1580 mSDtfsCounter, 1498 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1671 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:31:50,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1671 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:31:50,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7714 states. [2021-11-23 12:31:50,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7714 to 7648. [2021-11-23 12:31:50,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7648 states, 7646 states have (on average 1.508762751765629) internal successors, (11536), 7647 states have internal predecessors, (11536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:50,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7648 states to 7648 states and 11536 transitions. [2021-11-23 12:31:50,571 INFO L78 Accepts]: Start accepts. Automaton has 7648 states and 11536 transitions. Word has length 79 [2021-11-23 12:31:50,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:31:50,571 INFO L470 AbstractCegarLoop]: Abstraction has 7648 states and 11536 transitions. [2021-11-23 12:31:50,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:50,572 INFO L276 IsEmpty]: Start isEmpty. Operand 7648 states and 11536 transitions. [2021-11-23 12:31:50,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 12:31:50,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:31:50,573 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:31:50,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 12:31:50,574 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:31:50,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:31:50,574 INFO L85 PathProgramCache]: Analyzing trace with hash -848182079, now seen corresponding path program 1 times [2021-11-23 12:31:50,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:31:50,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562266793] [2021-11-23 12:31:50,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:31:50,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:31:50,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:31:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:31:50,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:31:50,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562266793] [2021-11-23 12:31:50,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562266793] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:31:50,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:31:50,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 12:31:50,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376489469] [2021-11-23 12:31:50,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:31:50,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:31:50,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:31:50,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:31:50,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:31:50,799 INFO L87 Difference]: Start difference. First operand 7648 states and 11536 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:51,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:31:51,341 INFO L93 Difference]: Finished difference Result 12996 states and 19474 transitions. [2021-11-23 12:31:51,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:31:51,341 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 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 79 [2021-11-23 12:31:51,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:31:51,357 INFO L225 Difference]: With dead ends: 12996 [2021-11-23 12:31:51,358 INFO L226 Difference]: Without dead ends: 7650 [2021-11-23 12:31:51,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-11-23 12:31:51,367 INFO L933 BasicCegarLoop]: 1575 mSDtfsCounter, 7790 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7790 SdHoareTripleChecker+Valid, 2051 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:31:51,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7790 Valid, 2051 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:31:51,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7650 states. [2021-11-23 12:31:51,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7650 to 7648. [2021-11-23 12:31:51,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7648 states, 7646 states have (on average 1.5003923620193564) internal successors, (11472), 7647 states have internal predecessors, (11472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:51,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7648 states to 7648 states and 11472 transitions. [2021-11-23 12:31:51,811 INFO L78 Accepts]: Start accepts. Automaton has 7648 states and 11472 transitions. Word has length 79 [2021-11-23 12:31:51,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:31:51,811 INFO L470 AbstractCegarLoop]: Abstraction has 7648 states and 11472 transitions. [2021-11-23 12:31:51,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:51,812 INFO L276 IsEmpty]: Start isEmpty. Operand 7648 states and 11472 transitions. [2021-11-23 12:31:51,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 12:31:51,813 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:31:51,813 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:31:51,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 12:31:51,814 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:31:51,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:31:51,814 INFO L85 PathProgramCache]: Analyzing trace with hash -938563623, now seen corresponding path program 1 times [2021-11-23 12:31:51,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:31:51,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32722784] [2021-11-23 12:31:51,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:31:51,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:31:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:31:51,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:31:51,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:31:51,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32722784] [2021-11-23 12:31:51,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32722784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:31:51,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:31:51,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:31:51,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489262026] [2021-11-23 12:31:51,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:31:51,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 12:31:51,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:31:51,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 12:31:51,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 12:31:51,892 INFO L87 Difference]: Start difference. First operand 7648 states and 11472 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:52,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:31:52,334 INFO L93 Difference]: Finished difference Result 12994 states and 19345 transitions. [2021-11-23 12:31:52,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:31:52,334 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-11-23 12:31:52,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:31:52,350 INFO L225 Difference]: With dead ends: 12994 [2021-11-23 12:31:52,350 INFO L226 Difference]: Without dead ends: 7648 [2021-11-23 12:31:52,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-23 12:31:52,359 INFO L933 BasicCegarLoop]: 1535 mSDtfsCounter, 4648 mSDsluCounter, 1520 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4648 SdHoareTripleChecker+Valid, 3055 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:31:52,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4648 Valid, 3055 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:31:52,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7648 states. [2021-11-23 12:31:52,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7648 to 7648. [2021-11-23 12:31:52,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7648 states, 7646 states have (on average 1.4920219722730839) internal successors, (11408), 7647 states have internal predecessors, (11408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:52,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7648 states to 7648 states and 11408 transitions. [2021-11-23 12:31:52,757 INFO L78 Accepts]: Start accepts. Automaton has 7648 states and 11408 transitions. Word has length 80 [2021-11-23 12:31:52,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:31:52,757 INFO L470 AbstractCegarLoop]: Abstraction has 7648 states and 11408 transitions. [2021-11-23 12:31:52,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:52,758 INFO L276 IsEmpty]: Start isEmpty. Operand 7648 states and 11408 transitions. [2021-11-23 12:31:52,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 12:31:52,759 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:31:52,759 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:31:52,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 12:31:52,759 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:31:52,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:31:52,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1639628201, now seen corresponding path program 1 times [2021-11-23 12:31:52,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:31:52,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764558718] [2021-11-23 12:31:52,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:31:52,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:31:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:31:52,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:31:52,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:31:52,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764558718] [2021-11-23 12:31:52,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764558718] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:31:52,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:31:52,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 12:31:52,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080170726] [2021-11-23 12:31:52,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:31:52,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 12:31:52,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:31:52,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 12:31:52,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:31:52,864 INFO L87 Difference]: Start difference. First operand 7648 states and 11408 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:53,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:31:53,594 INFO L93 Difference]: Finished difference Result 11618 states and 17115 transitions. [2021-11-23 12:31:53,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 12:31:53,595 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-11-23 12:31:53,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:31:53,620 INFO L225 Difference]: With dead ends: 11618 [2021-11-23 12:31:53,621 INFO L226 Difference]: Without dead ends: 11616 [2021-11-23 12:31:53,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:31:53,625 INFO L933 BasicCegarLoop]: 1631 mSDtfsCounter, 261 mSDsluCounter, 4748 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 6379 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:31:53,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 6379 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:31:53,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11616 states. [2021-11-23 12:31:54,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11616 to 7840. [2021-11-23 12:31:54,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7840 states, 7838 states have (on average 1.475886705792294) internal successors, (11568), 7839 states have internal predecessors, (11568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:54,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7840 states to 7840 states and 11568 transitions. [2021-11-23 12:31:54,115 INFO L78 Accepts]: Start accepts. Automaton has 7840 states and 11568 transitions. Word has length 80 [2021-11-23 12:31:54,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:31:54,116 INFO L470 AbstractCegarLoop]: Abstraction has 7840 states and 11568 transitions. [2021-11-23 12:31:54,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:54,116 INFO L276 IsEmpty]: Start isEmpty. Operand 7840 states and 11568 transitions. [2021-11-23 12:31:54,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-23 12:31:54,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:31:54,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:31:54,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 12:31:54,118 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:31:54,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:31:54,119 INFO L85 PathProgramCache]: Analyzing trace with hash 492740282, now seen corresponding path program 1 times [2021-11-23 12:31:54,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:31:54,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485089139] [2021-11-23 12:31:54,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:31:54,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:31:54,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:31:54,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:31:54,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:31:54,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485089139] [2021-11-23 12:31:54,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485089139] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:31:54,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:31:54,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:31:54,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908310924] [2021-11-23 12:31:54,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:31:54,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:31:54,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:31:54,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:31:54,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:31:54,174 INFO L87 Difference]: Start difference. First operand 7840 states and 11568 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:54,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:31:54,948 INFO L93 Difference]: Finished difference Result 13479 states and 19766 transitions. [2021-11-23 12:31:54,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:31:54,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-11-23 12:31:54,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:31:54,971 INFO L225 Difference]: With dead ends: 13479 [2021-11-23 12:31:54,971 INFO L226 Difference]: Without dead ends: 10404 [2021-11-23 12:31:54,978 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 [2021-11-23 12:31:54,979 INFO L933 BasicCegarLoop]: 1658 mSDtfsCounter, 1523 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1523 SdHoareTripleChecker+Valid, 1753 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:31:54,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1523 Valid, 1753 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:31:54,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10404 states. [2021-11-23 12:31:55,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10404 to 10402. [2021-11-23 12:31:55,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10402 states, 10400 states have (on average 1.4601923076923078) internal successors, (15186), 10401 states have internal predecessors, (15186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:55,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10402 states to 10402 states and 15186 transitions. [2021-11-23 12:31:55,622 INFO L78 Accepts]: Start accepts. Automaton has 10402 states and 15186 transitions. Word has length 81 [2021-11-23 12:31:55,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:31:55,622 INFO L470 AbstractCegarLoop]: Abstraction has 10402 states and 15186 transitions. [2021-11-23 12:31:55,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:55,623 INFO L276 IsEmpty]: Start isEmpty. Operand 10402 states and 15186 transitions. [2021-11-23 12:31:55,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 12:31:55,629 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:31:55,630 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 12:31:55,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 12:31:55,630 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:31:55,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:31:55,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1561529476, now seen corresponding path program 1 times [2021-11-23 12:31:55,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:31:55,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687390590] [2021-11-23 12:31:55,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:31:55,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:31:55,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:31:55,730 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-23 12:31:55,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:31:55,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687390590] [2021-11-23 12:31:55,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687390590] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:31:55,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:31:55,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 12:31:55,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531412108] [2021-11-23 12:31:55,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:31:55,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:31:55,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:31:55,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:31:55,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:31:55,733 INFO L87 Difference]: Start difference. First operand 10402 states and 15186 transitions. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:31:58,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:31:58,394 INFO L93 Difference]: Finished difference Result 60592 states and 86905 transitions. [2021-11-23 12:31:58,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:31:58,395 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-23 12:31:58,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:31:58,525 INFO L225 Difference]: With dead ends: 60592 [2021-11-23 12:31:58,526 INFO L226 Difference]: Without dead ends: 52494 [2021-11-23 12:31:58,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-23 12:31:58,546 INFO L933 BasicCegarLoop]: 1668 mSDtfsCounter, 8638 mSDsluCounter, 2148 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8638 SdHoareTripleChecker+Valid, 3816 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:31:58,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8638 Valid, 3816 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:31:58,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52494 states. [2021-11-23 12:32:00,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52494 to 18498. [2021-11-23 12:32:00,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18498 states, 18496 states have (on average 1.4421496539792387) internal successors, (26674), 18497 states have internal predecessors, (26674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:00,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18498 states to 18498 states and 26674 transitions. [2021-11-23 12:32:00,073 INFO L78 Accepts]: Start accepts. Automaton has 18498 states and 26674 transitions. Word has length 112 [2021-11-23 12:32:00,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:00,074 INFO L470 AbstractCegarLoop]: Abstraction has 18498 states and 26674 transitions. [2021-11-23 12:32:00,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:00,074 INFO L276 IsEmpty]: Start isEmpty. Operand 18498 states and 26674 transitions. [2021-11-23 12:32:00,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 12:32:00,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:00,082 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 12:32:00,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 12:32:00,083 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:32:00,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:00,083 INFO L85 PathProgramCache]: Analyzing trace with hash 964655004, now seen corresponding path program 1 times [2021-11-23 12:32:00,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:00,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779952476] [2021-11-23 12:32:00,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:00,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:00,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 12:32:00,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:00,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779952476] [2021-11-23 12:32:00,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779952476] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:32:00,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:32:00,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 12:32:00,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20062151] [2021-11-23 12:32:00,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:32:00,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:32:00,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:00,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:32:00,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:32:00,191 INFO L87 Difference]: Start difference. First operand 18498 states and 26674 transitions. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 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) [2021-11-23 12:32:03,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:03,404 INFO L93 Difference]: Finished difference Result 68688 states and 98393 transitions. [2021-11-23 12:32:03,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:32:03,405 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 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 112 [2021-11-23 12:32:03,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:03,516 INFO L225 Difference]: With dead ends: 68688 [2021-11-23 12:32:03,516 INFO L226 Difference]: Without dead ends: 60590 [2021-11-23 12:32:03,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-23 12:32:03,538 INFO L933 BasicCegarLoop]: 1670 mSDtfsCounter, 8455 mSDsluCounter, 2233 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8455 SdHoareTripleChecker+Valid, 3903 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:03,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8455 Valid, 3903 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:32:03,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60590 states. [2021-11-23 12:32:06,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60590 to 30658. [2021-11-23 12:32:06,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30658 states, 30656 states have (on average 1.429605949895616) internal successors, (43826), 30657 states have internal predecessors, (43826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:06,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30658 states to 30658 states and 43826 transitions. [2021-11-23 12:32:06,098 INFO L78 Accepts]: Start accepts. Automaton has 30658 states and 43826 transitions. Word has length 112 [2021-11-23 12:32:06,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:06,099 INFO L470 AbstractCegarLoop]: Abstraction has 30658 states and 43826 transitions. [2021-11-23 12:32:06,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 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) [2021-11-23 12:32:06,100 INFO L276 IsEmpty]: Start isEmpty. Operand 30658 states and 43826 transitions. [2021-11-23 12:32:06,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 12:32:06,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:06,110 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 12:32:06,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 12:32:06,110 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:32:06,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:06,111 INFO L85 PathProgramCache]: Analyzing trace with hash 2096294844, now seen corresponding path program 1 times [2021-11-23 12:32:06,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:06,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488675008] [2021-11-23 12:32:06,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:06,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:06,218 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 12:32:06,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:06,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488675008] [2021-11-23 12:32:06,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488675008] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:32:06,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:32:06,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 12:32:06,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988471448] [2021-11-23 12:32:06,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:32:06,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:32:06,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:06,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:32:06,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:32:06,222 INFO L87 Difference]: Start difference. First operand 30658 states and 43826 transitions. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:10,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:10,296 INFO L93 Difference]: Finished difference Result 76784 states and 109881 transitions. [2021-11-23 12:32:10,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:32:10,297 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-23 12:32:10,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:10,418 INFO L225 Difference]: With dead ends: 76784 [2021-11-23 12:32:10,418 INFO L226 Difference]: Without dead ends: 68686 [2021-11-23 12:32:10,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-23 12:32:10,449 INFO L933 BasicCegarLoop]: 1670 mSDtfsCounter, 8425 mSDsluCounter, 2255 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8425 SdHoareTripleChecker+Valid, 3925 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:10,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8425 Valid, 3925 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 12:32:10,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68686 states. [2021-11-23 12:32:13,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68686 to 38754. [2021-11-23 12:32:13,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38754 states, 38752 states have (on average 1.427384393063584) internal successors, (55314), 38753 states have internal predecessors, (55314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:13,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38754 states to 38754 states and 55314 transitions. [2021-11-23 12:32:13,452 INFO L78 Accepts]: Start accepts. Automaton has 38754 states and 55314 transitions. Word has length 112 [2021-11-23 12:32:13,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:13,452 INFO L470 AbstractCegarLoop]: Abstraction has 38754 states and 55314 transitions. [2021-11-23 12:32:13,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:13,453 INFO L276 IsEmpty]: Start isEmpty. Operand 38754 states and 55314 transitions. [2021-11-23 12:32:13,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 12:32:13,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:13,466 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 12:32:13,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 12:32:13,467 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:32:13,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:13,467 INFO L85 PathProgramCache]: Analyzing trace with hash 860835804, now seen corresponding path program 1 times [2021-11-23 12:32:13,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:13,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143672299] [2021-11-23 12:32:13,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:13,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 12:32:13,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:13,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143672299] [2021-11-23 12:32:13,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143672299] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:32:13,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:32:13,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 12:32:13,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636760505] [2021-11-23 12:32:13,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:32:13,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:32:13,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:13,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:32:13,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:32:13,594 INFO L87 Difference]: Start difference. First operand 38754 states and 55314 transitions. Second operand has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:19,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:19,149 INFO L93 Difference]: Finished difference Result 84880 states and 121369 transitions. [2021-11-23 12:32:19,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:32:19,149 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-23 12:32:19,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:19,263 INFO L225 Difference]: With dead ends: 84880 [2021-11-23 12:32:19,263 INFO L226 Difference]: Without dead ends: 76782 [2021-11-23 12:32:19,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-23 12:32:19,289 INFO L933 BasicCegarLoop]: 1670 mSDtfsCounter, 8493 mSDsluCounter, 2296 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8493 SdHoareTripleChecker+Valid, 3966 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:19,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8493 Valid, 3966 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:32:19,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76782 states. [2021-11-23 12:32:22,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76782 to 46850. [2021-11-23 12:32:22,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46850 states, 46848 states have (on average 1.4259306693989071) internal successors, (66802), 46849 states have internal predecessors, (66802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:23,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46850 states to 46850 states and 66802 transitions. [2021-11-23 12:32:23,013 INFO L78 Accepts]: Start accepts. Automaton has 46850 states and 66802 transitions. Word has length 112 [2021-11-23 12:32:23,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:23,014 INFO L470 AbstractCegarLoop]: Abstraction has 46850 states and 66802 transitions. [2021-11-23 12:32:23,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.25) internal successors, (106), 8 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:23,014 INFO L276 IsEmpty]: Start isEmpty. Operand 46850 states and 66802 transitions. [2021-11-23 12:32:23,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 12:32:23,028 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:23,028 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 12:32:23,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 12:32:23,029 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:32:23,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:23,029 INFO L85 PathProgramCache]: Analyzing trace with hash -560159748, now seen corresponding path program 1 times [2021-11-23 12:32:23,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:23,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283835831] [2021-11-23 12:32:23,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:23,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:23,138 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 12:32:23,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:23,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283835831] [2021-11-23 12:32:23,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283835831] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:32:23,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:32:23,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 12:32:23,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759432857] [2021-11-23 12:32:23,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:32:23,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 12:32:23,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:23,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 12:32:23,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 12:32:23,143 INFO L87 Difference]: Start difference. First operand 46850 states and 66802 transitions. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:29,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:29,569 INFO L93 Difference]: Finished difference Result 92976 states and 132857 transitions. [2021-11-23 12:32:29,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 12:32:29,570 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-11-23 12:32:29,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:29,681 INFO L225 Difference]: With dead ends: 92976 [2021-11-23 12:32:29,681 INFO L226 Difference]: Without dead ends: 84878 [2021-11-23 12:32:29,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-23 12:32:29,702 INFO L933 BasicCegarLoop]: 1668 mSDtfsCounter, 8607 mSDsluCounter, 2237 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8607 SdHoareTripleChecker+Valid, 3905 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:29,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8607 Valid, 3905 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:32:29,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84878 states. [2021-11-23 12:32:34,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84878 to 54946. [2021-11-23 12:32:34,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54946 states, 54944 states have (on average 1.424905358182877) internal successors, (78290), 54945 states have internal predecessors, (78290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:34,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54946 states to 54946 states and 78290 transitions. [2021-11-23 12:32:34,577 INFO L78 Accepts]: Start accepts. Automaton has 54946 states and 78290 transitions. Word has length 112 [2021-11-23 12:32:34,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:32:34,578 INFO L470 AbstractCegarLoop]: Abstraction has 54946 states and 78290 transitions. [2021-11-23 12:32:34,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:34,578 INFO L276 IsEmpty]: Start isEmpty. Operand 54946 states and 78290 transitions. [2021-11-23 12:32:34,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 12:32:34,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:32:34,594 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 12:32:34,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 12:32:34,595 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:32:34,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:32:34,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1259528020, now seen corresponding path program 1 times [2021-11-23 12:32:34,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:32:34,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798134282] [2021-11-23 12:32:34,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:32:34,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:32:34,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:32:34,656 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:32:34,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:32:34,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798134282] [2021-11-23 12:32:34,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798134282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:32:34,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:32:34,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:32:34,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72059271] [2021-11-23 12:32:34,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:32:34,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:32:34,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:32:34,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:32:34,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:32:34,659 INFO L87 Difference]: Start difference. First operand 54946 states and 78290 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:32:37,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:32:37,871 INFO L93 Difference]: Finished difference Result 91592 states and 130748 transitions. [2021-11-23 12:32:37,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:32:37,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 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 114 [2021-11-23 12:32:37,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:32:37,914 INFO L225 Difference]: With dead ends: 91592 [2021-11-23 12:32:37,915 INFO L226 Difference]: Without dead ends: 38950 [2021-11-23 12:32:37,945 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 [2021-11-23 12:32:37,946 INFO L933 BasicCegarLoop]: 1630 mSDtfsCounter, 62 mSDsluCounter, 1566 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 3196 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:32:37,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 3196 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:32:37,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38950 states.