./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9db88713350d7306821dd75614e70e6b858505d66168ef8348e173e7f0890ab2 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:50:53,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:50:53,629 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:50:53,658 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:50:53,659 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:50:53,660 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:50:53,662 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:50:53,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:50:53,666 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:50:53,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:50:53,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:50:53,669 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:50:53,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:50:53,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:50:53,672 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:50:53,673 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:50:53,674 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:50:53,675 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:50:53,677 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:50:53,679 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:50:53,681 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:50:53,683 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:50:53,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:50:53,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:50:53,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:50:53,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:50:53,688 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:50:53,688 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:50:53,689 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:50:53,690 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:50:53,690 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:50:53,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:50:53,691 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:50:53,692 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:50:53,692 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:50:53,693 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:50:53,693 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:50:53,693 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:50:53,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:50:53,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:50:53,694 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:50:53,695 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 17:50:53,712 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:50:53,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:50:53,712 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:50:53,712 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:50:53,713 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:50:53,713 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:50:53,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:50:53,714 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:50:53,714 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:50:53,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:50:53,714 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:50:53,714 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:50:53,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:50:53,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:50:53,715 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:50:53,715 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:50:53,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:50:53,715 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:50:53,715 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:50:53,715 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:50:53,715 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:50:53,716 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:50:53,716 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:50:53,716 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:50:53,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:50:53,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:50:53,716 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:50:53,716 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:50:53,717 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:50:53,717 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:50:53,717 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:50:53,717 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:50:53,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:50:53,717 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:50:53,717 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_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9db88713350d7306821dd75614e70e6b858505d66168ef8348e173e7f0890ab2 [2021-12-06 17:50:53,901 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:50:53,919 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:50:53,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:50:53,921 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:50:53,922 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:50:53,923 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c [2021-12-06 17:50:53,964 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/data/2e15c7ad1/acdcaec4abd04361b149830d2c1caf33/FLAG1d81deabe [2021-12-06 17:50:54,385 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:50:54,385 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c [2021-12-06 17:50:54,392 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/data/2e15c7ad1/acdcaec4abd04361b149830d2c1caf33/FLAG1d81deabe [2021-12-06 17:50:54,401 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/data/2e15c7ad1/acdcaec4abd04361b149830d2c1caf33 [2021-12-06 17:50:54,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:50:54,404 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:50:54,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:50:54,406 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:50:54,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:50:54,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:50:54" (1/1) ... [2021-12-06 17:50:54,409 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@389a6ea2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:50:54, skipping insertion in model container [2021-12-06 17:50:54,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:50:54" (1/1) ... [2021-12-06 17:50:54,415 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:50:54,436 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:50:54,568 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_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c[9529,9542] [2021-12-06 17:50:54,570 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:50:54,577 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:50:54,611 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_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c[9529,9542] [2021-12-06 17:50:54,612 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:50:54,623 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:50:54,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:50:54 WrapperNode [2021-12-06 17:50:54,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:50:54,624 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:50:54,624 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:50:54,624 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:50:54,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:50:54" (1/1) ... [2021-12-06 17:50:54,637 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:50:54" (1/1) ... [2021-12-06 17:50:54,660 INFO L137 Inliner]: procedures = 24, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 320 [2021-12-06 17:50:54,660 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:50:54,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:50:54,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:50:54,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:50:54,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:50:54" (1/1) ... [2021-12-06 17:50:54,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:50:54" (1/1) ... [2021-12-06 17:50:54,670 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:50:54" (1/1) ... [2021-12-06 17:50:54,671 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:50:54" (1/1) ... [2021-12-06 17:50:54,676 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:50:54" (1/1) ... [2021-12-06 17:50:54,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:50:54" (1/1) ... [2021-12-06 17:50:54,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:50:54" (1/1) ... [2021-12-06 17:50:54,687 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:50:54,688 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:50:54,688 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:50:54,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:50:54,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:50:54" (1/1) ... [2021-12-06 17:50:54,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:50:54,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:50:54,721 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:50:54,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:50:54,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:50:54,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:50:54,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:50:54,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:50:54,831 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:50:54,833 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:50:55,136 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:50:55,144 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:50:55,145 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 17:50:55,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:50:55 BoogieIcfgContainer [2021-12-06 17:50:55,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:50:55,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:50:55,149 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:50:55,152 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:50:55,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:50:54" (1/3) ... [2021-12-06 17:50:55,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a749222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:50:55, skipping insertion in model container [2021-12-06 17:50:55,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:50:54" (2/3) ... [2021-12-06 17:50:55,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a749222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:50:55, skipping insertion in model container [2021-12-06 17:50:55,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:50:55" (3/3) ... [2021-12-06 17:50:55,154 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.UNBOUNDED.pals.c [2021-12-06 17:50:55,160 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:50:55,160 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 17:50:55,196 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:50:55,201 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 17:50:55,201 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 17:50:55,214 INFO L276 IsEmpty]: Start isEmpty. Operand has 102 states, 100 states have (on average 1.69) internal successors, (169), 101 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:55,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 17:50:55,219 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:55,220 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] [2021-12-06 17:50:55,220 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:55,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:55,224 INFO L85 PathProgramCache]: Analyzing trace with hash 773042370, now seen corresponding path program 1 times [2021-12-06 17:50:55,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:55,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705155630] [2021-12-06 17:50:55,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:55,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:55,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:55,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:55,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705155630] [2021-12-06 17:50:55,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705155630] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:50:55,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:50:55,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 17:50:55,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363024742] [2021-12-06 17:50:55,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:50:55,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 17:50:55,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:55,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 17:50:55,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 17:50:55,383 INFO L87 Difference]: Start difference. First operand has 102 states, 100 states have (on average 1.69) internal successors, (169), 101 states have internal predecessors, (169), 0 states have call successors, (0), 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 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:55,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:55,401 INFO L93 Difference]: Finished difference Result 171 states and 281 transitions. [2021-12-06 17:50:55,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 17:50:55,402 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-12-06 17:50:55,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:55,409 INFO L225 Difference]: With dead ends: 171 [2021-12-06 17:50:55,409 INFO L226 Difference]: Without dead ends: 98 [2021-12-06 17:50:55,411 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 [2021-12-06 17:50:55,414 INFO L933 BasicCegarLoop]: 162 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, 162 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 [2021-12-06 17:50:55,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:50:55,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-06 17:50:55,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-12-06 17:50:55,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.6701030927835052) internal successors, (162), 97 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:55,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 162 transitions. [2021-12-06 17:50:55,443 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 162 transitions. Word has length 30 [2021-12-06 17:50:55,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:55,444 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 162 transitions. [2021-12-06 17:50:55,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:55,444 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 162 transitions. [2021-12-06 17:50:55,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 17:50:55,445 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:55,445 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] [2021-12-06 17:50:55,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:50:55,446 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:55,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:55,447 INFO L85 PathProgramCache]: Analyzing trace with hash 913590980, now seen corresponding path program 1 times [2021-12-06 17:50:55,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:55,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598774704] [2021-12-06 17:50:55,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:55,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:55,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:55,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598774704] [2021-12-06 17:50:55,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598774704] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:50:55,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:50:55,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:50:55,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852095857] [2021-12-06 17:50:55,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:50:55,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 17:50:55,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:55,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 17:50:55,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 17:50:55,516 INFO L87 Difference]: Start difference. First operand 98 states and 162 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:55,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:55,569 INFO L93 Difference]: Finished difference Result 170 states and 274 transitions. [2021-12-06 17:50:55,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 17:50:55,570 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-12-06 17:50:55,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:55,571 INFO L225 Difference]: With dead ends: 170 [2021-12-06 17:50:55,571 INFO L226 Difference]: Without dead ends: 98 [2021-12-06 17:50:55,572 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 [2021-12-06 17:50:55,573 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 3 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:55,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 613 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:50:55,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-06 17:50:55,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-12-06 17:50:55,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.422680412371134) internal successors, (138), 97 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:55,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 138 transitions. [2021-12-06 17:50:55,585 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 138 transitions. Word has length 30 [2021-12-06 17:50:55,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:55,585 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 138 transitions. [2021-12-06 17:50:55,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:55,585 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 138 transitions. [2021-12-06 17:50:55,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-06 17:50:55,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:55,587 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] [2021-12-06 17:50:55,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 17:50:55,587 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:55,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:55,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1508952555, now seen corresponding path program 1 times [2021-12-06 17:50:55,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:55,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931429901] [2021-12-06 17:50:55,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:55,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:55,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:55,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931429901] [2021-12-06 17:50:55,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931429901] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:50:55,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:50:55,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:50:55,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741980500] [2021-12-06 17:50:55,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:50:55,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:50:55,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:55,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:50:55,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:50:55,658 INFO L87 Difference]: Start difference. First operand 98 states and 138 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:55,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:55,676 INFO L93 Difference]: Finished difference Result 222 states and 334 transitions. [2021-12-06 17:50:55,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:50:55,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2021-12-06 17:50:55,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:55,678 INFO L225 Difference]: With dead ends: 222 [2021-12-06 17:50:55,678 INFO L226 Difference]: Without dead ends: 154 [2021-12-06 17:50:55,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:50:55,680 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 91 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:55,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 299 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:50:55,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-12-06 17:50:55,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2021-12-06 17:50:55,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.4834437086092715) internal successors, (224), 151 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:55,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 224 transitions. [2021-12-06 17:50:55,691 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 224 transitions. Word has length 53 [2021-12-06 17:50:55,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:55,691 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 224 transitions. [2021-12-06 17:50:55,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:55,692 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 224 transitions. [2021-12-06 17:50:55,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 17:50:55,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:55,693 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] [2021-12-06 17:50:55,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 17:50:55,693 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:55,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:55,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1759991574, now seen corresponding path program 1 times [2021-12-06 17:50:55,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:55,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503644262] [2021-12-06 17:50:55,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:55,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:55,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:55,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:55,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503644262] [2021-12-06 17:50:55,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503644262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:50:55,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:50:55,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:50:55,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927335825] [2021-12-06 17:50:55,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:50:55,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:50:55,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:55,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:50:55,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:50:55,747 INFO L87 Difference]: Start difference. First operand 152 states and 224 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:55,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:55,765 INFO L93 Difference]: Finished difference Result 372 states and 572 transitions. [2021-12-06 17:50:55,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:50:55,765 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-12-06 17:50:55,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:55,767 INFO L225 Difference]: With dead ends: 372 [2021-12-06 17:50:55,767 INFO L226 Difference]: Without dead ends: 250 [2021-12-06 17:50:55,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:50:55,769 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 86 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:55,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 290 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:50:55,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-12-06 17:50:55,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 248. [2021-12-06 17:50:55,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.5182186234817814) internal successors, (375), 247 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:55,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 375 transitions. [2021-12-06 17:50:55,784 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 375 transitions. Word has length 54 [2021-12-06 17:50:55,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:55,785 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 375 transitions. [2021-12-06 17:50:55,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:55,785 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 375 transitions. [2021-12-06 17:50:55,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 17:50:55,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:55,787 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] [2021-12-06 17:50:55,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 17:50:55,787 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:55,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:55,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1078196827, now seen corresponding path program 1 times [2021-12-06 17:50:55,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:55,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77363481] [2021-12-06 17:50:55,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:55,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:55,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:55,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:55,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77363481] [2021-12-06 17:50:55,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77363481] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:50:55,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:50:55,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:50:55,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320316424] [2021-12-06 17:50:55,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:50:55,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:50:55,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:55,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:50:55,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:50:55,832 INFO L87 Difference]: Start difference. First operand 248 states and 375 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:55,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:55,853 INFO L93 Difference]: Finished difference Result 636 states and 985 transitions. [2021-12-06 17:50:55,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:50:55,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 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 55 [2021-12-06 17:50:55,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:55,855 INFO L225 Difference]: With dead ends: 636 [2021-12-06 17:50:55,856 INFO L226 Difference]: Without dead ends: 418 [2021-12-06 17:50:55,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:50:55,857 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 81 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:55,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 281 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:50:55,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-12-06 17:50:55,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 416. [2021-12-06 17:50:55,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.5301204819277108) internal successors, (635), 415 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:55,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 635 transitions. [2021-12-06 17:50:55,879 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 635 transitions. Word has length 55 [2021-12-06 17:50:55,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:55,879 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 635 transitions. [2021-12-06 17:50:55,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:55,879 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 635 transitions. [2021-12-06 17:50:55,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 17:50:55,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:55,881 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] [2021-12-06 17:50:55,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 17:50:55,881 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:55,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:55,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1363611750, now seen corresponding path program 1 times [2021-12-06 17:50:55,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:55,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224578762] [2021-12-06 17:50:55,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:55,882 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:55,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:55,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:55,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224578762] [2021-12-06 17:50:55,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224578762] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:50:55,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:50:55,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:50:55,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077639394] [2021-12-06 17:50:55,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:50:55,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:50:55,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:55,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:50:55,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:50:55,938 INFO L87 Difference]: Start difference. First operand 416 states and 635 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:56,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:56,048 INFO L93 Difference]: Finished difference Result 2346 states and 3660 transitions. [2021-12-06 17:50:56,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:50:56,048 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-12-06 17:50:56,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:56,058 INFO L225 Difference]: With dead ends: 2346 [2021-12-06 17:50:56,058 INFO L226 Difference]: Without dead ends: 1960 [2021-12-06 17:50:56,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:50:56,060 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 780 mSDsluCounter, 1016 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:56,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 1152 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:50:56,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2021-12-06 17:50:56,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 800. [2021-12-06 17:50:56,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 1.5306633291614518) internal successors, (1223), 799 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:56,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1223 transitions. [2021-12-06 17:50:56,097 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1223 transitions. Word has length 56 [2021-12-06 17:50:56,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:56,097 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 1223 transitions. [2021-12-06 17:50:56,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:56,097 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1223 transitions. [2021-12-06 17:50:56,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-06 17:50:56,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:56,099 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] [2021-12-06 17:50:56,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 17:50:56,099 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:56,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:56,099 INFO L85 PathProgramCache]: Analyzing trace with hash 294385397, now seen corresponding path program 1 times [2021-12-06 17:50:56,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:56,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868619171] [2021-12-06 17:50:56,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:56,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:56,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:56,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:56,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:56,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868619171] [2021-12-06 17:50:56,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868619171] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:50:56,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:50:56,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:50:56,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198286783] [2021-12-06 17:50:56,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:50:56,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:50:56,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:56,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:50:56,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:50:56,175 INFO L87 Difference]: Start difference. First operand 800 states and 1223 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:56,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:56,353 INFO L93 Difference]: Finished difference Result 3568 states and 5459 transitions. [2021-12-06 17:50:56,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:50:56,354 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 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 57 [2021-12-06 17:50:56,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:56,369 INFO L225 Difference]: With dead ends: 3568 [2021-12-06 17:50:56,369 INFO L226 Difference]: Without dead ends: 2798 [2021-12-06 17:50:56,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:50:56,371 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 356 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:56,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 652 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:50:56,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2021-12-06 17:50:56,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 2792. [2021-12-06 17:50:56,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2792 states, 2791 states have (on average 1.5216768183446794) internal successors, (4247), 2791 states have internal predecessors, (4247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:56,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 4247 transitions. [2021-12-06 17:50:56,475 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 4247 transitions. Word has length 57 [2021-12-06 17:50:56,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:56,476 INFO L470 AbstractCegarLoop]: Abstraction has 2792 states and 4247 transitions. [2021-12-06 17:50:56,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:56,476 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 4247 transitions. [2021-12-06 17:50:56,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 17:50:56,477 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:56,477 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] [2021-12-06 17:50:56,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 17:50:56,477 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:56,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:56,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1296866655, now seen corresponding path program 1 times [2021-12-06 17:50:56,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:56,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334163915] [2021-12-06 17:50:56,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:56,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:56,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:56,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:56,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334163915] [2021-12-06 17:50:56,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334163915] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:50:56,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:50:56,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:50:56,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079500086] [2021-12-06 17:50:56,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:50:56,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:50:56,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:56,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:50:56,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:50:56,508 INFO L87 Difference]: Start difference. First operand 2792 states and 4247 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:56,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:56,649 INFO L93 Difference]: Finished difference Result 7468 states and 11289 transitions. [2021-12-06 17:50:56,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:50:56,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-12-06 17:50:56,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:56,669 INFO L225 Difference]: With dead ends: 7468 [2021-12-06 17:50:56,669 INFO L226 Difference]: Without dead ends: 4706 [2021-12-06 17:50:56,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:50:56,673 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 93 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:56,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 318 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:50:56,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4706 states. [2021-12-06 17:50:56,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4706 to 4704. [2021-12-06 17:50:56,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4704 states, 4703 states have (on average 1.489900063789071) internal successors, (7007), 4703 states have internal predecessors, (7007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:56,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4704 states to 4704 states and 7007 transitions. [2021-12-06 17:50:56,853 INFO L78 Accepts]: Start accepts. Automaton has 4704 states and 7007 transitions. Word has length 58 [2021-12-06 17:50:56,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:56,854 INFO L470 AbstractCegarLoop]: Abstraction has 4704 states and 7007 transitions. [2021-12-06 17:50:56,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:56,854 INFO L276 IsEmpty]: Start isEmpty. Operand 4704 states and 7007 transitions. [2021-12-06 17:50:56,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 17:50:56,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:56,855 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] [2021-12-06 17:50:56,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 17:50:56,855 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:56,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:56,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1866607497, now seen corresponding path program 1 times [2021-12-06 17:50:56,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:56,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057771557] [2021-12-06 17:50:56,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:56,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:56,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:56,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:56,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057771557] [2021-12-06 17:50:56,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057771557] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:50:56,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:50:56,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 17:50:56,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667362896] [2021-12-06 17:50:56,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:50:56,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 17:50:56,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:56,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 17:50:56,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-06 17:50:56,925 INFO L87 Difference]: Start difference. First operand 4704 states and 7007 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:57,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:57,311 INFO L93 Difference]: Finished difference Result 9890 states and 14496 transitions. [2021-12-06 17:50:57,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 17:50:57,311 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-12-06 17:50:57,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:57,351 INFO L225 Difference]: With dead ends: 9890 [2021-12-06 17:50:57,351 INFO L226 Difference]: Without dead ends: 9888 [2021-12-06 17:50:57,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-06 17:50:57,354 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 783 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:57,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 663 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:50:57,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9888 states. [2021-12-06 17:50:57,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9888 to 5088. [2021-12-06 17:50:57,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5088 states, 5087 states have (on average 1.4529192058187537) internal successors, (7391), 5087 states have internal predecessors, (7391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:57,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 7391 transitions. [2021-12-06 17:50:57,590 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 7391 transitions. Word has length 58 [2021-12-06 17:50:57,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:57,590 INFO L470 AbstractCegarLoop]: Abstraction has 5088 states and 7391 transitions. [2021-12-06 17:50:57,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:57,590 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 7391 transitions. [2021-12-06 17:50:57,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-06 17:50:57,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:57,591 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] [2021-12-06 17:50:57,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 17:50:57,591 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:57,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:57,592 INFO L85 PathProgramCache]: Analyzing trace with hash 2082836158, now seen corresponding path program 1 times [2021-12-06 17:50:57,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:57,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716529531] [2021-12-06 17:50:57,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:57,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:57,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:57,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:57,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:57,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716529531] [2021-12-06 17:50:57,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716529531] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:50:57,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:50:57,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:50:57,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683169161] [2021-12-06 17:50:57,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:50:57,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:50:57,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:57,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:50:57,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:50:57,622 INFO L87 Difference]: Start difference. First operand 5088 states and 7391 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:57,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:50:57,856 INFO L93 Difference]: Finished difference Result 12334 states and 17947 transitions. [2021-12-06 17:50:57,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:50:57,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-12-06 17:50:57,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:50:57,892 INFO L225 Difference]: With dead ends: 12334 [2021-12-06 17:50:57,892 INFO L226 Difference]: Without dead ends: 7276 [2021-12-06 17:50:57,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:50:57,900 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 71 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:50:57,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 240 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:50:57,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7276 states. [2021-12-06 17:50:58,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7276 to 7218. [2021-12-06 17:50:58,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7218 states, 7217 states have (on average 1.4433975336012193) internal successors, (10417), 7217 states have internal predecessors, (10417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:58,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7218 states to 7218 states and 10417 transitions. [2021-12-06 17:50:58,182 INFO L78 Accepts]: Start accepts. Automaton has 7218 states and 10417 transitions. Word has length 59 [2021-12-06 17:50:58,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:50:58,183 INFO L470 AbstractCegarLoop]: Abstraction has 7218 states and 10417 transitions. [2021-12-06 17:50:58,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:50:58,183 INFO L276 IsEmpty]: Start isEmpty. Operand 7218 states and 10417 transitions. [2021-12-06 17:50:58,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 17:50:58,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:50:58,200 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 17:50:58,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 17:50:58,200 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:50:58,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:50:58,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1385324011, now seen corresponding path program 1 times [2021-12-06 17:50:58,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:50:58,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950481162] [2021-12-06 17:50:58,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:58,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:50:58,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:58,377 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:50:58,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:50:58,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950481162] [2021-12-06 17:50:58,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950481162] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:50:58,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096786466] [2021-12-06 17:50:58,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:50:58,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:50:58,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:50:58,379 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:50:58,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:50:58,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:50:58,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 17:50:58,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:50:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:50:58,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:50:58,976 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:50:58,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096786466] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:50:58,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:50:58,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2021-12-06 17:50:58,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794072838] [2021-12-06 17:50:58,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:50:58,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 17:50:58,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:50:58,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 17:50:58,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-06 17:50:58,979 INFO L87 Difference]: Start difference. First operand 7218 states and 10417 transitions. Second operand has 14 states, 14 states have (on average 17.0) internal successors, (238), 14 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:04,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:04,820 INFO L93 Difference]: Finished difference Result 91924 states and 132191 transitions. [2021-12-06 17:51:04,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-12-06 17:51:04,821 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 17.0) internal successors, (238), 14 states have internal predecessors, (238), 0 states have call successors, (0), 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 84 [2021-12-06 17:51:04,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:04,949 INFO L225 Difference]: With dead ends: 91924 [2021-12-06 17:51:04,950 INFO L226 Difference]: Without dead ends: 84994 [2021-12-06 17:51:04,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3772 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1857, Invalid=7455, Unknown=0, NotChecked=0, Total=9312 [2021-12-06 17:51:04,978 INFO L933 BasicCegarLoop]: 488 mSDtfsCounter, 6778 mSDsluCounter, 2685 mSDsCounter, 0 mSdLazyCounter, 2339 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6778 SdHoareTripleChecker+Valid, 3173 SdHoareTripleChecker+Invalid, 2536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 2339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:04,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6778 Valid, 3173 Invalid, 2536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 2339 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-06 17:51:05,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84994 states. [2021-12-06 17:51:07,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84994 to 49302. [2021-12-06 17:51:07,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49302 states, 49301 states have (on average 1.4253463418591914) internal successors, (70271), 49301 states have internal predecessors, (70271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:07,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49302 states to 49302 states and 70271 transitions. [2021-12-06 17:51:07,184 INFO L78 Accepts]: Start accepts. Automaton has 49302 states and 70271 transitions. Word has length 84 [2021-12-06 17:51:07,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:07,184 INFO L470 AbstractCegarLoop]: Abstraction has 49302 states and 70271 transitions. [2021-12-06 17:51:07,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.0) internal successors, (238), 14 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:07,185 INFO L276 IsEmpty]: Start isEmpty. Operand 49302 states and 70271 transitions. [2021-12-06 17:51:07,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 17:51:07,190 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:07,190 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:07,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:51:07,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 17:51:07,392 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:07,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:07,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1919863804, now seen corresponding path program 1 times [2021-12-06 17:51:07,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:07,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182779950] [2021-12-06 17:51:07,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:07,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:07,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:07,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:07,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:07,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182779950] [2021-12-06 17:51:07,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182779950] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:51:07,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:51:07,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:51:07,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891226466] [2021-12-06 17:51:07,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:51:07,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:51:07,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:07,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:51:07,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:51:07,440 INFO L87 Difference]: Start difference. First operand 49302 states and 70271 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:09,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:09,671 INFO L93 Difference]: Finished difference Result 95094 states and 135561 transitions. [2021-12-06 17:51:09,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:51:09,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-12-06 17:51:09,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:09,755 INFO L225 Difference]: With dead ends: 95094 [2021-12-06 17:51:09,755 INFO L226 Difference]: Without dead ends: 67714 [2021-12-06 17:51:09,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:51:09,781 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 72 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:09,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 291 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:51:09,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67714 states. [2021-12-06 17:51:12,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67714 to 63482. [2021-12-06 17:51:12,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63482 states, 63481 states have (on average 1.4087522250752194) internal successors, (89429), 63481 states have internal predecessors, (89429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:12,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63482 states to 63482 states and 89429 transitions. [2021-12-06 17:51:12,346 INFO L78 Accepts]: Start accepts. Automaton has 63482 states and 89429 transitions. Word has length 84 [2021-12-06 17:51:12,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:12,346 INFO L470 AbstractCegarLoop]: Abstraction has 63482 states and 89429 transitions. [2021-12-06 17:51:12,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:12,347 INFO L276 IsEmpty]: Start isEmpty. Operand 63482 states and 89429 transitions. [2021-12-06 17:51:12,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 17:51:12,354 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:12,354 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:12,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 17:51:12,354 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:12,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:12,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1033627306, now seen corresponding path program 1 times [2021-12-06 17:51:12,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:12,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544696957] [2021-12-06 17:51:12,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:12,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 17:51:12,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:12,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544696957] [2021-12-06 17:51:12,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544696957] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:51:12,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:51:12,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:51:12,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161593416] [2021-12-06 17:51:12,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:51:12,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:51:12,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:12,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:51:12,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:51:12,408 INFO L87 Difference]: Start difference. First operand 63482 states and 89429 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:16,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:16,316 INFO L93 Difference]: Finished difference Result 149388 states and 211620 transitions. [2021-12-06 17:51:16,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:51:16,317 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 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 84 [2021-12-06 17:51:16,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:16,452 INFO L225 Difference]: With dead ends: 149388 [2021-12-06 17:51:16,453 INFO L226 Difference]: Without dead ends: 121306 [2021-12-06 17:51:16,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:51:16,484 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 678 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:16,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 824 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:51:16,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121306 states. [2021-12-06 17:51:20,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121306 to 89144. [2021-12-06 17:51:20,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89144 states, 89143 states have (on average 1.4068743479577757) internal successors, (125413), 89143 states have internal predecessors, (125413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:20,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89144 states to 89144 states and 125413 transitions. [2021-12-06 17:51:20,486 INFO L78 Accepts]: Start accepts. Automaton has 89144 states and 125413 transitions. Word has length 84 [2021-12-06 17:51:20,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:20,486 INFO L470 AbstractCegarLoop]: Abstraction has 89144 states and 125413 transitions. [2021-12-06 17:51:20,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:20,486 INFO L276 IsEmpty]: Start isEmpty. Operand 89144 states and 125413 transitions. [2021-12-06 17:51:20,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 17:51:20,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:20,492 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:20,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 17:51:20,493 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:20,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:20,493 INFO L85 PathProgramCache]: Analyzing trace with hash -19484726, now seen corresponding path program 1 times [2021-12-06 17:51:20,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:20,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091763965] [2021-12-06 17:51:20,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:20,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:20,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:20,520 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:20,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:20,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091763965] [2021-12-06 17:51:20,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091763965] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:51:20,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:51:20,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:51:20,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525679138] [2021-12-06 17:51:20,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:51:20,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:51:20,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:20,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:51:20,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:51:20,522 INFO L87 Difference]: Start difference. First operand 89144 states and 125413 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:24,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:24,153 INFO L93 Difference]: Finished difference Result 143256 states and 200676 transitions. [2021-12-06 17:51:24,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:51:24,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-12-06 17:51:24,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:24,246 INFO L225 Difference]: With dead ends: 143256 [2021-12-06 17:51:24,246 INFO L226 Difference]: Without dead ends: 91970 [2021-12-06 17:51:24,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:51:24,268 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 73 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:24,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 304 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:51:24,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91970 states. [2021-12-06 17:51:28,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91970 to 88218. [2021-12-06 17:51:28,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88218 states, 88217 states have (on average 1.3820012015824614) internal successors, (121916), 88217 states have internal predecessors, (121916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:28,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88218 states to 88218 states and 121916 transitions. [2021-12-06 17:51:28,255 INFO L78 Accepts]: Start accepts. Automaton has 88218 states and 121916 transitions. Word has length 84 [2021-12-06 17:51:28,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:28,255 INFO L470 AbstractCegarLoop]: Abstraction has 88218 states and 121916 transitions. [2021-12-06 17:51:28,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:28,256 INFO L276 IsEmpty]: Start isEmpty. Operand 88218 states and 121916 transitions. [2021-12-06 17:51:28,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 17:51:28,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:28,262 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:28,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 17:51:28,263 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:28,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:28,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1876395358, now seen corresponding path program 1 times [2021-12-06 17:51:28,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:28,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542741433] [2021-12-06 17:51:28,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:28,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 17:51:28,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:28,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542741433] [2021-12-06 17:51:28,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542741433] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:51:28,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:51:28,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:51:28,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443293350] [2021-12-06 17:51:28,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:51:28,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:51:28,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:28,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:51:28,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:51:28,311 INFO L87 Difference]: Start difference. First operand 88218 states and 121916 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 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) [2021-12-06 17:51:32,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:32,996 INFO L93 Difference]: Finished difference Result 161219 states and 225050 transitions. [2021-12-06 17:51:32,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:51:32,997 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 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 84 [2021-12-06 17:51:32,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:33,162 INFO L225 Difference]: With dead ends: 161219 [2021-12-06 17:51:33,162 INFO L226 Difference]: Without dead ends: 140335 [2021-12-06 17:51:33,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:51:33,202 INFO L933 BasicCegarLoop]: 246 mSDtfsCounter, 662 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:33,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [662 Valid, 794 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:51:33,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140335 states. [2021-12-06 17:51:37,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140335 to 107928. [2021-12-06 17:51:37,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107928 states, 107927 states have (on average 1.3834536306948215) internal successors, (149312), 107927 states have internal predecessors, (149312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:37,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107928 states to 107928 states and 149312 transitions. [2021-12-06 17:51:37,816 INFO L78 Accepts]: Start accepts. Automaton has 107928 states and 149312 transitions. Word has length 84 [2021-12-06 17:51:37,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:37,816 INFO L470 AbstractCegarLoop]: Abstraction has 107928 states and 149312 transitions. [2021-12-06 17:51:37,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 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) [2021-12-06 17:51:37,817 INFO L276 IsEmpty]: Start isEmpty. Operand 107928 states and 149312 transitions. [2021-12-06 17:51:37,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 17:51:37,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:37,822 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:51:37,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 17:51:37,823 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:37,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:37,823 INFO L85 PathProgramCache]: Analyzing trace with hash -2074966836, now seen corresponding path program 1 times [2021-12-06 17:51:37,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:37,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790202150] [2021-12-06 17:51:37,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:37,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:37,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 17:51:37,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:37,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790202150] [2021-12-06 17:51:37,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790202150] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:51:37,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:51:37,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:51:37,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411071451] [2021-12-06 17:51:37,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:51:37,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:51:37,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:37,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:51:37,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:51:37,864 INFO L87 Difference]: Start difference. First operand 107928 states and 149312 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:43,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:43,300 INFO L93 Difference]: Finished difference Result 167445 states and 233410 transitions. [2021-12-06 17:51:43,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:51:43,301 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 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 84 [2021-12-06 17:51:43,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:43,484 INFO L225 Difference]: With dead ends: 167445 [2021-12-06 17:51:43,484 INFO L226 Difference]: Without dead ends: 153511 [2021-12-06 17:51:43,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:51:43,525 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 622 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:43,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 881 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:51:43,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153511 states. [2021-12-06 17:51:48,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153511 to 121104. [2021-12-06 17:51:48,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121104 states, 121103 states have (on average 1.3846890663319653) internal successors, (167690), 121103 states have internal predecessors, (167690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:48,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121104 states to 121104 states and 167690 transitions. [2021-12-06 17:51:48,702 INFO L78 Accepts]: Start accepts. Automaton has 121104 states and 167690 transitions. Word has length 84 [2021-12-06 17:51:48,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:51:48,703 INFO L470 AbstractCegarLoop]: Abstraction has 121104 states and 167690 transitions. [2021-12-06 17:51:48,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:48,703 INFO L276 IsEmpty]: Start isEmpty. Operand 121104 states and 167690 transitions. [2021-12-06 17:51:48,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 17:51:48,709 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:51:48,709 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 17:51:48,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 17:51:48,709 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:51:48,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:51:48,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1959427768, now seen corresponding path program 1 times [2021-12-06 17:51:48,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:51:48,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840154517] [2021-12-06 17:51:48,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:51:48,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:51:48,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:51:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:51:48,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:51:48,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840154517] [2021-12-06 17:51:48,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840154517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:51:48,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:51:48,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:51:48,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434039751] [2021-12-06 17:51:48,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:51:48,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:51:48,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:51:48,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:51:48,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:51:48,735 INFO L87 Difference]: Start difference. First operand 121104 states and 167690 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:51:57,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:51:57,050 INFO L93 Difference]: Finished difference Result 334105 states and 460260 transitions. [2021-12-06 17:51:57,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:51:57,051 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-12-06 17:51:57,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:51:57,390 INFO L225 Difference]: With dead ends: 334105 [2021-12-06 17:51:57,391 INFO L226 Difference]: Without dead ends: 222252 [2021-12-06 17:51:57,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:51:57,447 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 68 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:51:57,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 268 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:51:57,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222252 states. [2021-12-06 17:52:06,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222252 to 222110. [2021-12-06 17:52:06,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222110 states, 222109 states have (on average 1.360043942388647) internal successors, (302078), 222109 states have internal predecessors, (302078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:52:07,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222110 states to 222110 states and 302078 transitions. [2021-12-06 17:52:07,076 INFO L78 Accepts]: Start accepts. Automaton has 222110 states and 302078 transitions. Word has length 85 [2021-12-06 17:52:07,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:07,076 INFO L470 AbstractCegarLoop]: Abstraction has 222110 states and 302078 transitions. [2021-12-06 17:52:07,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:52:07,077 INFO L276 IsEmpty]: Start isEmpty. Operand 222110 states and 302078 transitions. [2021-12-06 17:52:07,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 17:52:07,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:07,088 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 17:52:07,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 17:52:07,088 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:52:07,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:07,089 INFO L85 PathProgramCache]: Analyzing trace with hash -318911282, now seen corresponding path program 1 times [2021-12-06 17:52:07,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:52:07,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420338042] [2021-12-06 17:52:07,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:07,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:52:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:07,132 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 17:52:07,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:52:07,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420338042] [2021-12-06 17:52:07,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420338042] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:52:07,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:52:07,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:52:07,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185882779] [2021-12-06 17:52:07,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:52:07,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:52:07,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:52:07,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:52:07,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:52:07,134 INFO L87 Difference]: Start difference. First operand 222110 states and 302078 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:52:19,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:19,757 INFO L93 Difference]: Finished difference Result 370105 states and 506708 transitions. [2021-12-06 17:52:19,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:52:19,758 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-12-06 17:52:19,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:20,170 INFO L225 Difference]: With dead ends: 370105 [2021-12-06 17:52:20,170 INFO L226 Difference]: Without dead ends: 323631 [2021-12-06 17:52:20,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-06 17:52:20,242 INFO L933 BasicCegarLoop]: 249 mSDtfsCounter, 613 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:20,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 984 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:52:20,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323631 states. [2021-12-06 17:52:31,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323631 to 258522. [2021-12-06 17:52:31,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258522 states, 258521 states have (on average 1.3582068768107813) internal successors, (351125), 258521 states have internal predecessors, (351125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:52:32,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258522 states to 258522 states and 351125 transitions. [2021-12-06 17:52:32,276 INFO L78 Accepts]: Start accepts. Automaton has 258522 states and 351125 transitions. Word has length 85 [2021-12-06 17:52:32,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:52:32,276 INFO L470 AbstractCegarLoop]: Abstraction has 258522 states and 351125 transitions. [2021-12-06 17:52:32,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:52:32,276 INFO L276 IsEmpty]: Start isEmpty. Operand 258522 states and 351125 transitions. [2021-12-06 17:52:32,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 17:52:32,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:52:32,288 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 17:52:32,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 17:52:32,288 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:52:32,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:52:32,289 INFO L85 PathProgramCache]: Analyzing trace with hash 2051258327, now seen corresponding path program 1 times [2021-12-06 17:52:32,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:52:32,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621263417] [2021-12-06 17:52:32,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:52:32,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:52:32,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:52:32,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:52:32,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:52:32,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621263417] [2021-12-06 17:52:32,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621263417] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:52:32,313 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:52:32,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:52:32,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536293779] [2021-12-06 17:52:32,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:52:32,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:52:32,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:52:32,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:52:32,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:52:32,314 INFO L87 Difference]: Start difference. First operand 258522 states and 351125 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:52:49,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:52:49,504 INFO L93 Difference]: Finished difference Result 668907 states and 904439 transitions. [2021-12-06 17:52:49,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:52:49,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-12-06 17:52:49,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:52:50,078 INFO L225 Difference]: With dead ends: 668907 [2021-12-06 17:52:50,078 INFO L226 Difference]: Without dead ends: 416409 [2021-12-06 17:52:50,178 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 [2021-12-06 17:52:50,178 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 70 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:52:50,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 316 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:52:50,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416409 states. [2021-12-06 17:53:05,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416409 to 321864. [2021-12-06 17:53:05,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321864 states, 321863 states have (on average 1.341723031227572) internal successors, (431851), 321863 states have internal predecessors, (431851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:06,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321864 states to 321864 states and 431851 transitions. [2021-12-06 17:53:06,462 INFO L78 Accepts]: Start accepts. Automaton has 321864 states and 431851 transitions. Word has length 87 [2021-12-06 17:53:06,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:53:06,462 INFO L470 AbstractCegarLoop]: Abstraction has 321864 states and 431851 transitions. [2021-12-06 17:53:06,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:06,462 INFO L276 IsEmpty]: Start isEmpty. Operand 321864 states and 431851 transitions. [2021-12-06 17:53:06,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-06 17:53:06,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:53:06,478 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:53:06,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 17:53:06,479 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:53:06,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:53:06,479 INFO L85 PathProgramCache]: Analyzing trace with hash -725962389, now seen corresponding path program 1 times [2021-12-06 17:53:06,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:53:06,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683735649] [2021-12-06 17:53:06,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:06,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:53:06,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:06,521 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:06,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:53:06,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683735649] [2021-12-06 17:53:06,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683735649] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:53:06,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748820969] [2021-12-06 17:53:06,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:53:06,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:53:06,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:53:06,523 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:53:06,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 17:53:06,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:53:06,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 17:53:06,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:53:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:06,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:53:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:53:07,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748820969] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:53:07,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:53:07,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-06 17:53:07,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048860203] [2021-12-06 17:53:07,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:53:07,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 17:53:07,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:53:07,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 17:53:07,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:53:07,023 INFO L87 Difference]: Start difference. First operand 321864 states and 431851 transitions. Second operand has 11 states, 11 states have (on average 13.636363636363637) internal successors, (150), 10 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:53:41,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:53:41,000 INFO L93 Difference]: Finished difference Result 932325 states and 1250867 transitions. [2021-12-06 17:53:41,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:53:41,001 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.636363636363637) internal successors, (150), 10 states have internal predecessors, (150), 0 states have call successors, (0), 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 88 [2021-12-06 17:53:41,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:53:42,121 INFO L225 Difference]: With dead ends: 932325 [2021-12-06 17:53:42,121 INFO L226 Difference]: Without dead ends: 725317 [2021-12-06 17:53:42,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-12-06 17:53:42,415 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 1852 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1852 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:53:42,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1852 Valid, 435 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:53:42,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725317 states. [2021-12-06 17:54:03,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725317 to 385683. [2021-12-06 17:54:03,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385683 states, 385682 states have (on average 1.3439154536638993) internal successors, (518324), 385682 states have internal predecessors, (518324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:54:04,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385683 states to 385683 states and 518324 transitions. [2021-12-06 17:54:04,721 INFO L78 Accepts]: Start accepts. Automaton has 385683 states and 518324 transitions. Word has length 88 [2021-12-06 17:54:04,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:54:04,721 INFO L470 AbstractCegarLoop]: Abstraction has 385683 states and 518324 transitions. [2021-12-06 17:54:04,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.636363636363637) internal successors, (150), 10 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:54:04,722 INFO L276 IsEmpty]: Start isEmpty. Operand 385683 states and 518324 transitions. [2021-12-06 17:54:04,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-06 17:54:04,740 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:54:04,740 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:54:04,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 17:54:04,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:04,941 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:54:04,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:54:04,942 INFO L85 PathProgramCache]: Analyzing trace with hash -951452873, now seen corresponding path program 1 times [2021-12-06 17:54:04,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:54:04,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231263484] [2021-12-06 17:54:04,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:54:04,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:54:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:04,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:04,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:54:04,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231263484] [2021-12-06 17:54:04,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231263484] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:54:04,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185630547] [2021-12-06 17:54:04,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:54:04,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:54:04,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:54:04,985 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:54:04,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:54:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:54:05,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 17:54:05,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:54:05,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:05,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:54:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:54:05,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185630547] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:54:05,340 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:54:05,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-06 17:54:05,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698916085] [2021-12-06 17:54:05,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:54:05,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 17:54:05,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:54:05,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 17:54:05,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:54:05,342 INFO L87 Difference]: Start difference. First operand 385683 states and 518324 transitions. Second operand has 11 states, 11 states have (on average 13.636363636363637) internal successors, (150), 10 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:54:43,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:54:43,747 INFO L93 Difference]: Finished difference Result 1032713 states and 1384549 transitions. [2021-12-06 17:54:43,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:54:43,748 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.636363636363637) internal successors, (150), 10 states have internal predecessors, (150), 0 states have call successors, (0), 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 88 [2021-12-06 17:54:43,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:54:44,869 INFO L225 Difference]: With dead ends: 1032713 [2021-12-06 17:54:44,869 INFO L226 Difference]: Without dead ends: 709538 [2021-12-06 17:54:45,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 170 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-12-06 17:54:45,063 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 1049 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1049 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:54:45,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1049 Valid, 610 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:54:45,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709538 states. [2021-12-06 17:55:09,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709538 to 418735. [2021-12-06 17:55:09,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418735 states, 418734 states have (on average 1.3458854547278225) internal successors, (563568), 418734 states have internal predecessors, (563568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:55:10,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418735 states to 418735 states and 563568 transitions. [2021-12-06 17:55:10,796 INFO L78 Accepts]: Start accepts. Automaton has 418735 states and 563568 transitions. Word has length 88 [2021-12-06 17:55:10,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:55:10,796 INFO L470 AbstractCegarLoop]: Abstraction has 418735 states and 563568 transitions. [2021-12-06 17:55:10,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.636363636363637) internal successors, (150), 10 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:55:10,797 INFO L276 IsEmpty]: Start isEmpty. Operand 418735 states and 563568 transitions. [2021-12-06 17:55:10,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 17:55:10,810 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:55:10,810 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:55:10,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 17:55:11,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-12-06 17:55:11,011 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:55:11,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:55:11,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1145949149, now seen corresponding path program 1 times [2021-12-06 17:55:11,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:55:11,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367833329] [2021-12-06 17:55:11,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:55:11,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:55:11,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:11,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:55:11,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:55:11,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367833329] [2021-12-06 17:55:11,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367833329] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:55:11,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:55:11,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:55:11,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572993248] [2021-12-06 17:55:11,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:55:11,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:55:11,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:55:11,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:55:11,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:55:11,069 INFO L87 Difference]: Start difference. First operand 418735 states and 563568 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:55:28,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:55:28,466 INFO L93 Difference]: Finished difference Result 724508 states and 969779 transitions. [2021-12-06 17:55:28,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:55:28,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 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 89 [2021-12-06 17:55:28,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:55:28,884 INFO L225 Difference]: With dead ends: 724508 [2021-12-06 17:55:28,884 INFO L226 Difference]: Without dead ends: 305987 [2021-12-06 17:55:29,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:55:29,048 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 67 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 292 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 [2021-12-06 17:55:29,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 292 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:55:29,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305987 states. [2021-12-06 17:55:46,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305987 to 305869. [2021-12-06 17:55:46,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305869 states, 305868 states have (on average 1.313360665385068) internal successors, (401715), 305868 states have internal predecessors, (401715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:55:47,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305869 states to 305869 states and 401715 transitions. [2021-12-06 17:55:47,544 INFO L78 Accepts]: Start accepts. Automaton has 305869 states and 401715 transitions. Word has length 89 [2021-12-06 17:55:47,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:55:47,545 INFO L470 AbstractCegarLoop]: Abstraction has 305869 states and 401715 transitions. [2021-12-06 17:55:47,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:55:47,545 INFO L276 IsEmpty]: Start isEmpty. Operand 305869 states and 401715 transitions. [2021-12-06 17:55:47,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 17:55:47,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:55:47,552 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 17:55:47,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-06 17:55:47,552 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:55:47,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:55:47,552 INFO L85 PathProgramCache]: Analyzing trace with hash 743141477, now seen corresponding path program 1 times [2021-12-06 17:55:47,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:55:47,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963365564] [2021-12-06 17:55:47,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:55:47,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:55:47,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:55:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 17:55:47,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:55:47,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963365564] [2021-12-06 17:55:47,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963365564] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:55:47,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:55:47,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:55:47,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733885130] [2021-12-06 17:55:47,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:55:47,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:55:47,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:55:47,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:55:47,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:55:47,589 INFO L87 Difference]: Start difference. First operand 305869 states and 401715 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:56:24,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:56:24,587 INFO L93 Difference]: Finished difference Result 954223 states and 1258051 transitions. [2021-12-06 17:56:24,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:56:24,588 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 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 89 [2021-12-06 17:56:24,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:56:25,561 INFO L225 Difference]: With dead ends: 954223 [2021-12-06 17:56:25,561 INFO L226 Difference]: Without dead ends: 648619 [2021-12-06 17:56:25,754 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 [2021-12-06 17:56:25,755 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 826 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:56:25,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 234 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:56:26,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648619 states. [2021-12-06 17:57:01,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648619 to 566100. [2021-12-06 17:57:01,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566100 states, 566099 states have (on average 1.3101065361359057) internal successors, (741650), 566099 states have internal predecessors, (741650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:03,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566100 states to 566100 states and 741650 transitions. [2021-12-06 17:57:03,293 INFO L78 Accepts]: Start accepts. Automaton has 566100 states and 741650 transitions. Word has length 89 [2021-12-06 17:57:03,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:57:03,293 INFO L470 AbstractCegarLoop]: Abstraction has 566100 states and 741650 transitions. [2021-12-06 17:57:03,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:03,293 INFO L276 IsEmpty]: Start isEmpty. Operand 566100 states and 741650 transitions. [2021-12-06 17:57:03,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 17:57:03,306 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:57:03,306 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 17:57:03,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 17:57:03,306 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:57:03,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:57:03,307 INFO L85 PathProgramCache]: Analyzing trace with hash 702466727, now seen corresponding path program 1 times [2021-12-06 17:57:03,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:57:03,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666983941] [2021-12-06 17:57:03,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:57:03,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:57:03,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:57:03,339 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 17:57:03,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:57:03,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666983941] [2021-12-06 17:57:03,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666983941] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:57:03,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:57:03,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 17:57:03,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376317979] [2021-12-06 17:57:03,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:57:03,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 17:57:03,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:57:03,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:57:03,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:57:03,340 INFO L87 Difference]: Start difference. First operand 566100 states and 741650 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:57:42,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:57:42,840 INFO L93 Difference]: Finished difference Result 1213935 states and 1589472 transitions. [2021-12-06 17:57:42,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:57:42,841 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 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 89 [2021-12-06 17:57:42,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:57:43,937 INFO L225 Difference]: With dead ends: 1213935 [2021-12-06 17:57:43,937 INFO L226 Difference]: Without dead ends: 649098 [2021-12-06 17:57:44,170 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 [2021-12-06 17:57:44,171 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 727 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:57:44,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [727 Valid, 224 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:57:44,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649098 states. [2021-12-06 17:58:22,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649098 to 617022. [2021-12-06 17:58:23,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617022 states, 617021 states have (on average 1.292826338163531) internal successors, (797701), 617021 states have internal predecessors, (797701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:58:24,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617022 states to 617022 states and 797701 transitions. [2021-12-06 17:58:24,779 INFO L78 Accepts]: Start accepts. Automaton has 617022 states and 797701 transitions. Word has length 89 [2021-12-06 17:58:24,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:58:24,780 INFO L470 AbstractCegarLoop]: Abstraction has 617022 states and 797701 transitions. [2021-12-06 17:58:24,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:58:24,780 INFO L276 IsEmpty]: Start isEmpty. Operand 617022 states and 797701 transitions. [2021-12-06 17:58:24,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 17:58:24,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:58:24,794 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 17:58:24,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 17:58:24,794 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:58:24,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:58:24,795 INFO L85 PathProgramCache]: Analyzing trace with hash -188803127, now seen corresponding path program 1 times [2021-12-06 17:58:24,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:58:24,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625666755] [2021-12-06 17:58:24,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:24,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:58:24,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:24,835 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:24,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:58:24,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625666755] [2021-12-06 17:58:24,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625666755] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:58:24,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364367058] [2021-12-06 17:58:24,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:58:24,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:58:24,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:58:24,836 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:58:24,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 17:58:24,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:58:24,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 17:58:24,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:58:25,096 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:25,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:58:25,181 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:58:25,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364367058] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:58:25,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:58:25,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-06 17:58:25,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637839339] [2021-12-06 17:58:25,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:58:25,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 17:58:25,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:58:25,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 17:58:25,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-06 17:58:25,182 INFO L87 Difference]: Start difference. First operand 617022 states and 797701 transitions. Second operand has 11 states, 11 states have (on average 14.090909090909092) internal successors, (155), 10 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:59:42,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:59:42,134 INFO L93 Difference]: Finished difference Result 1534000 states and 1979998 transitions. [2021-12-06 17:59:42,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 17:59:42,135 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 14.090909090909092) internal successors, (155), 10 states have internal predecessors, (155), 0 states have call successors, (0), 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 89 [2021-12-06 17:59:42,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:59:44,120 INFO L225 Difference]: With dead ends: 1534000 [2021-12-06 17:59:44,121 INFO L226 Difference]: Without dead ends: 1210028 [2021-12-06 17:59:44,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-12-06 17:59:44,403 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 1752 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1752 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:59:44,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1752 Valid, 456 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:59:45,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210028 states. [2021-12-06 18:00:33,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210028 to 694942. [2021-12-06 18:00:33,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694942 states, 694941 states have (on average 1.2936983139575877) internal successors, (899044), 694941 states have internal predecessors, (899044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:00:35,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694942 states to 694942 states and 899044 transitions. [2021-12-06 18:00:35,806 INFO L78 Accepts]: Start accepts. Automaton has 694942 states and 899044 transitions. Word has length 89 [2021-12-06 18:00:35,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:00:35,807 INFO L470 AbstractCegarLoop]: Abstraction has 694942 states and 899044 transitions. [2021-12-06 18:00:35,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.090909090909092) internal successors, (155), 10 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:00:35,807 INFO L276 IsEmpty]: Start isEmpty. Operand 694942 states and 899044 transitions. [2021-12-06 18:00:35,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-06 18:00:35,820 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:00:35,820 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 18:00:35,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 18:00:36,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:00:36,022 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:00:36,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:00:36,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1005604733, now seen corresponding path program 1 times [2021-12-06 18:00:36,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:00:36,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715718606] [2021-12-06 18:00:36,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:00:36,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:00:36,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:36,152 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:00:36,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:00:36,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715718606] [2021-12-06 18:00:36,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715718606] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:00:36,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881716114] [2021-12-06 18:00:36,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:00:36,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:00:36,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:00:36,153 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:00:36,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cd1da1b-6c10-4a73-a4e1-1f95fd170a76/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:00:36,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:36,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 18:00:36,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:00:36,628 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:00:36,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:00:37,176 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:00:37,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881716114] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:00:37,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:00:37,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-06 18:00:37,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241965381] [2021-12-06 18:00:37,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:00:37,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 18:00:37,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:00:37,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 18:00:37,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-12-06 18:00:37,177 INFO L87 Difference]: Start difference. First operand 694942 states and 899044 transitions. Second operand has 21 states, 21 states have (on average 9.761904761904763) internal successors, (205), 20 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)