./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.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_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/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_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/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_75f63e32-b765-4fa1-9ce3-6d5be02b777a/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 927c21c2096a228a934a41e2a18844ff0d670b1b365a7d276a4e36116ab9babc --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 22:59:42,629 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 22:59:42,632 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 22:59:42,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 22:59:42,659 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 22:59:42,660 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 22:59:42,662 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 22:59:42,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 22:59:42,665 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 22:59:42,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 22:59:42,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 22:59:42,667 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 22:59:42,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 22:59:42,668 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 22:59:42,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 22:59:42,671 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 22:59:42,671 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 22:59:42,672 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 22:59:42,674 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 22:59:42,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 22:59:42,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 22:59:42,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 22:59:42,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 22:59:42,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 22:59:42,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 22:59:42,683 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 22:59:42,683 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 22:59:42,684 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 22:59:42,684 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 22:59:42,685 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 22:59:42,685 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 22:59:42,686 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 22:59:42,687 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 22:59:42,687 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 22:59:42,688 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 22:59:42,688 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 22:59:42,689 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 22:59:42,689 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 22:59:42,689 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 22:59:42,690 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 22:59:42,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 22:59:42,691 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 22:59:42,707 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 22:59:42,707 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 22:59:42,707 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 22:59:42,708 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 22:59:42,708 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 22:59:42,708 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 22:59:42,709 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 22:59:42,709 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 22:59:42,709 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 22:59:42,709 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 22:59:42,709 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 22:59:42,709 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 22:59:42,709 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 22:59:42,709 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 22:59:42,710 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 22:59:42,710 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 22:59:42,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 22:59:42,710 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 22:59:42,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 22:59:42,710 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 22:59:42,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 22:59:42,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 22:59:42,710 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 22:59:42,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 22:59:42,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:59:42,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 22:59:42,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 22:59:42,711 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 22:59:42,711 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 22:59:42,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 22:59:42,711 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 22:59:42,711 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 22:59:42,712 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 22:59:42,712 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 22:59:42,712 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_75f63e32-b765-4fa1-9ce3-6d5be02b777a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 927c21c2096a228a934a41e2a18844ff0d670b1b365a7d276a4e36116ab9babc [2021-12-06 22:59:42,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 22:59:42,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 22:59:42,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 22:59:42,919 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 22:59:42,919 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 22:59:42,920 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c [2021-12-06 22:59:42,972 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/data/6f8bbfdbf/ff542ea9efdf4b6e8ddf9bafde14c03d/FLAG3edce57ad [2021-12-06 22:59:43,367 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 22:59:43,368 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c [2021-12-06 22:59:43,376 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/data/6f8bbfdbf/ff542ea9efdf4b6e8ddf9bafde14c03d/FLAG3edce57ad [2021-12-06 22:59:43,385 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/data/6f8bbfdbf/ff542ea9efdf4b6e8ddf9bafde14c03d [2021-12-06 22:59:43,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 22:59:43,389 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 22:59:43,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 22:59:43,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 22:59:43,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 22:59:43,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:59:43" (1/1) ... [2021-12-06 22:59:43,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@654c833f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:59:43, skipping insertion in model container [2021-12-06 22:59:43,394 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:59:43" (1/1) ... [2021-12-06 22:59:43,399 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 22:59:43,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 22:59:43,594 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_75f63e32-b765-4fa1-9ce3-6d5be02b777a/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c[9376,9389] [2021-12-06 22:59:43,597 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:59:43,603 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 22:59:43,634 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_75f63e32-b765-4fa1-9ce3-6d5be02b777a/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c[9376,9389] [2021-12-06 22:59:43,634 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:59:43,647 INFO L208 MainTranslator]: Completed translation [2021-12-06 22:59:43,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:59:43 WrapperNode [2021-12-06 22:59:43,647 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 22:59:43,648 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 22:59:43,648 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 22:59:43,648 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 22:59:43,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:59:43" (1/1) ... [2021-12-06 22:59:43,660 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:59:43" (1/1) ... [2021-12-06 22:59:43,685 INFO L137 Inliner]: procedures = 24, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 313 [2021-12-06 22:59:43,685 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 22:59:43,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 22:59:43,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 22:59:43,686 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 22:59:43,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:59:43" (1/1) ... [2021-12-06 22:59:43,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:59:43" (1/1) ... [2021-12-06 22:59:43,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:59:43" (1/1) ... [2021-12-06 22:59:43,695 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:59:43" (1/1) ... [2021-12-06 22:59:43,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:59:43" (1/1) ... [2021-12-06 22:59:43,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:59:43" (1/1) ... [2021-12-06 22:59:43,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:59:43" (1/1) ... [2021-12-06 22:59:43,710 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 22:59:43,711 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 22:59:43,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 22:59:43,711 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 22:59:43,712 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:59:43" (1/1) ... [2021-12-06 22:59:43,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:59:43,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:59:43,742 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 22:59:43,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 22:59:43,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 22:59:43,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 22:59:43,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 22:59:43,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 22:59:43,847 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 22:59:43,849 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 22:59:44,096 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 22:59:44,102 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 22:59:44,102 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 22:59:44,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:59:44 BoogieIcfgContainer [2021-12-06 22:59:44,104 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 22:59:44,105 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 22:59:44,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 22:59:44,108 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 22:59:44,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 10:59:43" (1/3) ... [2021-12-06 22:59:44,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60866679 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:59:44, skipping insertion in model container [2021-12-06 22:59:44,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:59:43" (2/3) ... [2021-12-06 22:59:44,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60866679 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:59:44, skipping insertion in model container [2021-12-06 22:59:44,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:59:44" (3/3) ... [2021-12-06 22:59:44,110 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c [2021-12-06 22:59:44,114 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 22:59:44,114 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 22:59:44,149 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 22:59:44,154 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 22:59:44,154 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 22:59:44,166 INFO L276 IsEmpty]: Start isEmpty. Operand has 99 states, 97 states have (on average 1.690721649484536) internal successors, (164), 98 states have internal predecessors, (164), 0 states have call successors, (0), 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 22:59:44,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 22:59:44,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:59:44,172 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] [2021-12-06 22:59:44,172 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:59:44,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:44,176 INFO L85 PathProgramCache]: Analyzing trace with hash -107778019, now seen corresponding path program 1 times [2021-12-06 22:59:44,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:44,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010117440] [2021-12-06 22:59:44,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:44,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:44,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:44,320 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 22:59:44,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:44,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010117440] [2021-12-06 22:59:44,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010117440] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:44,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:44,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 22:59:44,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067044088] [2021-12-06 22:59:44,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:44,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 22:59:44,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:44,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 22:59:44,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 22:59:44,349 INFO L87 Difference]: Start difference. First operand has 99 states, 97 states have (on average 1.690721649484536) internal successors, (164), 98 states have internal predecessors, (164), 0 states have call successors, (0), 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 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 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 22:59:44,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:59:44,367 INFO L93 Difference]: Finished difference Result 165 states and 271 transitions. [2021-12-06 22:59:44,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 22:59:44,369 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-12-06 22:59:44,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:59:44,376 INFO L225 Difference]: With dead ends: 165 [2021-12-06 22:59:44,376 INFO L226 Difference]: Without dead ends: 95 [2021-12-06 22:59:44,378 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 22:59:44,381 INFO L933 BasicCegarLoop]: 157 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, 157 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 22:59:44,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:59:44,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-06 22:59:44,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-12-06 22:59:44,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.6702127659574468) internal successors, (157), 94 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:44,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 157 transitions. [2021-12-06 22:59:44,412 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 157 transitions. Word has length 29 [2021-12-06 22:59:44,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:59:44,413 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 157 transitions. [2021-12-06 22:59:44,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 14.5) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 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 22:59:44,413 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 157 transitions. [2021-12-06 22:59:44,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 22:59:44,414 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:59:44,414 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] [2021-12-06 22:59:44,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 22:59:44,415 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:59:44,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:44,416 INFO L85 PathProgramCache]: Analyzing trace with hash -241791525, now seen corresponding path program 1 times [2021-12-06 22:59:44,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:44,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668750563] [2021-12-06 22:59:44,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:44,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:44,484 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 22:59:44,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:44,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668750563] [2021-12-06 22:59:44,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668750563] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:44,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:44,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 22:59:44,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108464947] [2021-12-06 22:59:44,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:44,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:59:44,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:44,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:59:44,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:59:44,487 INFO L87 Difference]: Start difference. First operand 95 states and 157 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 22:59:44,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:59:44,540 INFO L93 Difference]: Finished difference Result 164 states and 264 transitions. [2021-12-06 22:59:44,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:59:44,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 29 [2021-12-06 22:59:44,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:59:44,542 INFO L225 Difference]: With dead ends: 164 [2021-12-06 22:59:44,542 INFO L226 Difference]: Without dead ends: 95 [2021-12-06 22:59:44,543 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 22:59:44,544 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 3 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 593 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 22:59:44,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 593 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:59:44,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-06 22:59:44,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-12-06 22:59:44,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.4148936170212767) internal successors, (133), 94 states have internal predecessors, (133), 0 states have call successors, (0), 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 22:59:44,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 133 transitions. [2021-12-06 22:59:44,552 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 133 transitions. Word has length 29 [2021-12-06 22:59:44,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:59:44,553 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 133 transitions. [2021-12-06 22:59:44,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 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 22:59:44,553 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 133 transitions. [2021-12-06 22:59:44,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 22:59:44,555 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:59:44,555 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] [2021-12-06 22:59:44,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 22:59:44,555 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:59:44,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:44,556 INFO L85 PathProgramCache]: Analyzing trace with hash 747245012, now seen corresponding path program 1 times [2021-12-06 22:59:44,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:44,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731136084] [2021-12-06 22:59:44,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:44,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:44,629 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 22:59:44,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:44,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731136084] [2021-12-06 22:59:44,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731136084] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:44,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:44,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:59:44,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391982241] [2021-12-06 22:59:44,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:44,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:59:44,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:44,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:59:44,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:59:44,632 INFO L87 Difference]: Start difference. First operand 95 states and 133 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 22:59:44,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:59:44,650 INFO L93 Difference]: Finished difference Result 213 states and 319 transitions. [2021-12-06 22:59:44,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:59:44,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 52 [2021-12-06 22:59:44,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:59:44,652 INFO L225 Difference]: With dead ends: 213 [2021-12-06 22:59:44,652 INFO L226 Difference]: Without dead ends: 148 [2021-12-06 22:59:44,653 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 22:59:44,654 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 87 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 289 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 22:59:44,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 289 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:59:44,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-12-06 22:59:44,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2021-12-06 22:59:44,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.4758620689655173) internal successors, (214), 145 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:59:44,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 214 transitions. [2021-12-06 22:59:44,667 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 214 transitions. Word has length 52 [2021-12-06 22:59:44,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:59:44,667 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 214 transitions. [2021-12-06 22:59:44,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 22:59:44,667 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 214 transitions. [2021-12-06 22:59:44,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-06 22:59:44,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:59:44,669 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 22:59:44,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 22:59:44,669 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:59:44,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:44,670 INFO L85 PathProgramCache]: Analyzing trace with hash 396878357, now seen corresponding path program 1 times [2021-12-06 22:59:44,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:44,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491624028] [2021-12-06 22:59:44,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:44,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:44,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:44,724 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 22:59:44,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:44,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491624028] [2021-12-06 22:59:44,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491624028] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:44,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:44,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:59:44,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088557345] [2021-12-06 22:59:44,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:44,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:59:44,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:44,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:59:44,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:59:44,726 INFO L87 Difference]: Start difference. First operand 146 states and 214 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 22:59:44,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:59:44,742 INFO L93 Difference]: Finished difference Result 354 states and 542 transitions. [2021-12-06 22:59:44,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:59:44,742 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 22:59:44,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:59:44,744 INFO L225 Difference]: With dead ends: 354 [2021-12-06 22:59:44,744 INFO L226 Difference]: Without dead ends: 238 [2021-12-06 22:59:44,745 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 22:59:44,746 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 82 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 280 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 22:59:44,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 280 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:59:44,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-12-06 22:59:44,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2021-12-06 22:59:44,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.5106382978723405) internal successors, (355), 235 states have internal predecessors, (355), 0 states have call successors, (0), 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 22:59:44,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 355 transitions. [2021-12-06 22:59:44,762 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 355 transitions. Word has length 53 [2021-12-06 22:59:44,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:59:44,762 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 355 transitions. [2021-12-06 22:59:44,762 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 22:59:44,762 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 355 transitions. [2021-12-06 22:59:44,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-06 22:59:44,764 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:59:44,764 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 22:59:44,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 22:59:44,764 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:59:44,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:44,765 INFO L85 PathProgramCache]: Analyzing trace with hash -778312060, now seen corresponding path program 1 times [2021-12-06 22:59:44,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:44,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663634485] [2021-12-06 22:59:44,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:44,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:44,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:44,808 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 22:59:44,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:44,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663634485] [2021-12-06 22:59:44,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663634485] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:44,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:44,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:59:44,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465463679] [2021-12-06 22:59:44,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:44,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:59:44,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:44,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:59:44,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:59:44,810 INFO L87 Difference]: Start difference. First operand 236 states and 355 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 22:59:44,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:59:44,829 INFO L93 Difference]: Finished difference Result 600 states and 925 transitions. [2021-12-06 22:59:44,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:59:44,829 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 22:59:44,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:59:44,831 INFO L225 Difference]: With dead ends: 600 [2021-12-06 22:59:44,832 INFO L226 Difference]: Without dead ends: 394 [2021-12-06 22:59:44,833 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 22:59:44,834 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 77 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 271 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 22:59:44,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 271 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:59:44,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-12-06 22:59:44,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 392. [2021-12-06 22:59:44,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 391 states have (on average 1.5217391304347827) internal successors, (595), 391 states have internal predecessors, (595), 0 states have call successors, (0), 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 22:59:44,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 595 transitions. [2021-12-06 22:59:44,855 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 595 transitions. Word has length 54 [2021-12-06 22:59:44,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:59:44,855 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 595 transitions. [2021-12-06 22:59:44,855 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 22:59:44,855 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 595 transitions. [2021-12-06 22:59:44,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 22:59:44,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:59:44,856 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 22:59:44,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 22:59:44,857 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:59:44,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:44,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1214154885, now seen corresponding path program 1 times [2021-12-06 22:59:44,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:44,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37308627] [2021-12-06 22:59:44,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:44,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:44,913 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 22:59:44,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:44,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37308627] [2021-12-06 22:59:44,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37308627] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:44,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:44,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:59:44,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322502467] [2021-12-06 22:59:44,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:44,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:59:44,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:44,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:59:44,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:59:44,915 INFO L87 Difference]: Start difference. First operand 392 states and 595 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 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 22:59:45,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:59:45,051 INFO L93 Difference]: Finished difference Result 2202 states and 3420 transitions. [2021-12-06 22:59:45,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:59:45,052 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 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 22:59:45,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:59:45,062 INFO L225 Difference]: With dead ends: 2202 [2021-12-06 22:59:45,062 INFO L226 Difference]: Without dead ends: 1840 [2021-12-06 22:59:45,063 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 22:59:45,064 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 746 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 1037 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 22:59:45,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 1037 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:59:45,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-12-06 22:59:45,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 752. [2021-12-06 22:59:45,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 1.521970705725699) internal successors, (1143), 751 states have internal predecessors, (1143), 0 states have call successors, (0), 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 22:59:45,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1143 transitions. [2021-12-06 22:59:45,099 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1143 transitions. Word has length 55 [2021-12-06 22:59:45,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:59:45,100 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 1143 transitions. [2021-12-06 22:59:45,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 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 22:59:45,100 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1143 transitions. [2021-12-06 22:59:45,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 22:59:45,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:59:45,101 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 22:59:45,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 22:59:45,101 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:59:45,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:45,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1399227554, now seen corresponding path program 1 times [2021-12-06 22:59:45,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:45,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451321724] [2021-12-06 22:59:45,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:45,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:45,172 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 22:59:45,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:45,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451321724] [2021-12-06 22:59:45,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451321724] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:45,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:45,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:59:45,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972756511] [2021-12-06 22:59:45,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:45,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:59:45,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:45,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:59:45,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:59:45,174 INFO L87 Difference]: Start difference. First operand 752 states and 1143 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 22:59:45,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:59:45,304 INFO L93 Difference]: Finished difference Result 3376 states and 5139 transitions. [2021-12-06 22:59:45,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:59:45,305 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 22:59:45,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:59:45,316 INFO L225 Difference]: With dead ends: 3376 [2021-12-06 22:59:45,316 INFO L226 Difference]: Without dead ends: 2654 [2021-12-06 22:59:45,317 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 22:59:45,318 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 345 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:59:45,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 528 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:59:45,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2654 states. [2021-12-06 22:59:45,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2654 to 2648. [2021-12-06 22:59:45,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 2647 states have (on average 1.5137891953154514) internal successors, (4007), 2647 states have internal predecessors, (4007), 0 states have call successors, (0), 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 22:59:45,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 4007 transitions. [2021-12-06 22:59:45,409 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 4007 transitions. Word has length 56 [2021-12-06 22:59:45,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:59:45,410 INFO L470 AbstractCegarLoop]: Abstraction has 2648 states and 4007 transitions. [2021-12-06 22:59:45,410 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 22:59:45,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 4007 transitions. [2021-12-06 22:59:45,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-06 22:59:45,411 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:59:45,411 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 22:59:45,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 22:59:45,411 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:59:45,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:45,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1806755418, now seen corresponding path program 1 times [2021-12-06 22:59:45,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:45,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196233704] [2021-12-06 22:59:45,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:45,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:45,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:45,466 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 22:59:45,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:45,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196233704] [2021-12-06 22:59:45,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196233704] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:45,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:45,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 22:59:45,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897339170] [2021-12-06 22:59:45,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:45,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:59:45,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:45,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:59:45,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:59:45,467 INFO L87 Difference]: Start difference. First operand 2648 states and 4007 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 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 22:59:45,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:59:45,675 INFO L93 Difference]: Finished difference Result 5522 states and 8240 transitions. [2021-12-06 22:59:45,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 22:59:45,676 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 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 22:59:45,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:59:45,707 INFO L225 Difference]: With dead ends: 5522 [2021-12-06 22:59:45,707 INFO L226 Difference]: Without dead ends: 5520 [2021-12-06 22:59:45,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:59:45,710 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 288 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:59:45,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 592 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:59:45,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5520 states. [2021-12-06 22:59:45,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5520 to 2840. [2021-12-06 22:59:45,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2839 states have (on average 1.4790419161676647) internal successors, (4199), 2839 states have internal predecessors, (4199), 0 states have call successors, (0), 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 22:59:45,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4199 transitions. [2021-12-06 22:59:45,862 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4199 transitions. Word has length 57 [2021-12-06 22:59:45,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:59:45,863 INFO L470 AbstractCegarLoop]: Abstraction has 2840 states and 4199 transitions. [2021-12-06 22:59:45,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 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 22:59:45,863 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4199 transitions. [2021-12-06 22:59:45,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-06 22:59:45,864 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:59:45,865 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 22:59:45,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 22:59:45,865 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:59:45,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:45,866 INFO L85 PathProgramCache]: Analyzing trace with hash 227421697, now seen corresponding path program 1 times [2021-12-06 22:59:45,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:45,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660726008] [2021-12-06 22:59:45,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:45,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:45,906 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 22:59:45,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:45,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660726008] [2021-12-06 22:59:45,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660726008] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:45,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:45,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:59:45,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615817771] [2021-12-06 22:59:45,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:45,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:59:45,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:45,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:59:45,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:59:45,909 INFO L87 Difference]: Start difference. First operand 2840 states and 4199 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 22:59:46,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:59:46,111 INFO L93 Difference]: Finished difference Result 7692 states and 11321 transitions. [2021-12-06 22:59:46,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:59:46,111 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 22:59:46,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:59:46,137 INFO L225 Difference]: With dead ends: 7692 [2021-12-06 22:59:46,137 INFO L226 Difference]: Without dead ends: 4882 [2021-12-06 22:59:46,141 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 22:59:46,141 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 67 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 231 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 22:59:46,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 231 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:59:46,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4882 states. [2021-12-06 22:59:46,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4882 to 4824. [2021-12-06 22:59:46,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4824 states, 4823 states have (on average 1.4478540327596932) internal successors, (6983), 4823 states have internal predecessors, (6983), 0 states have call successors, (0), 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 22:59:46,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4824 states to 4824 states and 6983 transitions. [2021-12-06 22:59:46,337 INFO L78 Accepts]: Start accepts. Automaton has 4824 states and 6983 transitions. Word has length 58 [2021-12-06 22:59:46,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:59:46,337 INFO L470 AbstractCegarLoop]: Abstraction has 4824 states and 6983 transitions. [2021-12-06 22:59:46,338 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 22:59:46,338 INFO L276 IsEmpty]: Start isEmpty. Operand 4824 states and 6983 transitions. [2021-12-06 22:59:46,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-06 22:59:46,338 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:59:46,339 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 22:59:46,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 22:59:46,339 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:59:46,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:46,339 INFO L85 PathProgramCache]: Analyzing trace with hash -2122531684, now seen corresponding path program 1 times [2021-12-06 22:59:46,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:46,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856999092] [2021-12-06 22:59:46,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:46,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:46,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:46,364 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 22:59:46,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:46,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856999092] [2021-12-06 22:59:46,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856999092] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:46,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:46,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:59:46,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433550637] [2021-12-06 22:59:46,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:46,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:59:46,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:46,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:59:46,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:59:46,366 INFO L87 Difference]: Start difference. First operand 4824 states and 6983 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 22:59:46,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:59:46,568 INFO L93 Difference]: Finished difference Result 9743 states and 14173 transitions. [2021-12-06 22:59:46,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:59:46,568 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 22:59:46,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:59:46,595 INFO L225 Difference]: With dead ends: 9743 [2021-12-06 22:59:46,596 INFO L226 Difference]: Without dead ends: 6932 [2021-12-06 22:59:46,599 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 22:59:46,599 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 88 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 310 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 22:59:46,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 310 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:59:46,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6932 states. [2021-12-06 22:59:46,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6932 to 6930. [2021-12-06 22:59:46,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6930 states, 6929 states have (on average 1.4341174772694472) internal successors, (9937), 6929 states have internal predecessors, (9937), 0 states have call successors, (0), 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 22:59:46,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6930 states to 6930 states and 9937 transitions. [2021-12-06 22:59:46,854 INFO L78 Accepts]: Start accepts. Automaton has 6930 states and 9937 transitions. Word has length 59 [2021-12-06 22:59:46,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:59:46,854 INFO L470 AbstractCegarLoop]: Abstraction has 6930 states and 9937 transitions. [2021-12-06 22:59:46,854 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 22:59:46,854 INFO L276 IsEmpty]: Start isEmpty. Operand 6930 states and 9937 transitions. [2021-12-06 22:59:46,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 22:59:46,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:59:46,858 INFO L514 BasicCegarLoop]: trace histogram [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 22:59:46,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 22:59:46,858 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:59:46,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:46,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1504297558, now seen corresponding path program 1 times [2021-12-06 22:59:46,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:46,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432672748] [2021-12-06 22:59:46,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:46,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:46,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:46,906 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:59:46,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:46,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432672748] [2021-12-06 22:59:46,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432672748] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:46,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:46,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:59:46,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844916432] [2021-12-06 22:59:46,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:46,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:59:46,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:46,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:59:46,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:59:46,907 INFO L87 Difference]: Start difference. First operand 6930 states and 9937 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 22:59:47,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:59:47,200 INFO L93 Difference]: Finished difference Result 16593 states and 23741 transitions. [2021-12-06 22:59:47,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:59:47,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-12-06 22:59:47,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:59:47,226 INFO L225 Difference]: With dead ends: 16593 [2021-12-06 22:59:47,227 INFO L226 Difference]: Without dead ends: 11119 [2021-12-06 22:59:47,232 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 22:59:47,233 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 66 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 263 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 22:59:47,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 263 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:59:47,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11119 states. [2021-12-06 22:59:47,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11119 to 10545. [2021-12-06 22:59:47,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10545 states, 10544 states have (on average 1.4164453717754173) internal successors, (14935), 10544 states have internal predecessors, (14935), 0 states have call successors, (0), 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 22:59:47,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10545 states to 10545 states and 14935 transitions. [2021-12-06 22:59:47,605 INFO L78 Accepts]: Start accepts. Automaton has 10545 states and 14935 transitions. Word has length 82 [2021-12-06 22:59:47,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:59:47,605 INFO L470 AbstractCegarLoop]: Abstraction has 10545 states and 14935 transitions. [2021-12-06 22:59:47,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 22:59:47,606 INFO L276 IsEmpty]: Start isEmpty. Operand 10545 states and 14935 transitions. [2021-12-06 22:59:47,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 22:59:47,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:59:47,610 INFO L514 BasicCegarLoop]: trace histogram [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 22:59:47,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 22:59:47,611 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:59:47,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:47,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1310211642, now seen corresponding path program 1 times [2021-12-06 22:59:47,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:47,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065963333] [2021-12-06 22:59:47,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:47,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:47,660 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 22:59:47,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:47,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065963333] [2021-12-06 22:59:47,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065963333] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:47,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:47,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:59:47,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367530315] [2021-12-06 22:59:47,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:47,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:59:47,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:47,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:59:47,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:59:47,661 INFO L87 Difference]: Start difference. First operand 10545 states and 14935 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 22:59:48,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:59:48,158 INFO L93 Difference]: Finished difference Result 22607 states and 32332 transitions. [2021-12-06 22:59:48,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:59:48,159 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 82 [2021-12-06 22:59:48,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:59:48,200 INFO L225 Difference]: With dead ends: 22607 [2021-12-06 22:59:48,200 INFO L226 Difference]: Without dead ends: 18981 [2021-12-06 22:59:48,206 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 22:59:48,206 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 635 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:59:48,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [635 Valid, 742 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:59:48,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18981 states. [2021-12-06 22:59:48,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18981 to 14073. [2021-12-06 22:59:48,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14073 states, 14072 states have (on average 1.415505969300739) internal successors, (19919), 14072 states have internal predecessors, (19919), 0 states have call successors, (0), 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 22:59:48,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14073 states to 14073 states and 19919 transitions. [2021-12-06 22:59:48,697 INFO L78 Accepts]: Start accepts. Automaton has 14073 states and 19919 transitions. Word has length 82 [2021-12-06 22:59:48,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:59:48,697 INFO L470 AbstractCegarLoop]: Abstraction has 14073 states and 19919 transitions. [2021-12-06 22:59:48,697 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 22:59:48,697 INFO L276 IsEmpty]: Start isEmpty. Operand 14073 states and 19919 transitions. [2021-12-06 22:59:48,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 22:59:48,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:59:48,703 INFO L514 BasicCegarLoop]: trace histogram [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 22:59:48,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-06 22:59:48,704 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:59:48,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:48,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1737557706, now seen corresponding path program 1 times [2021-12-06 22:59:48,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:48,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21568519] [2021-12-06 22:59:48,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:48,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:59:48,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:48,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21568519] [2021-12-06 22:59:48,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21568519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:48,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:48,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:59:48,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063158090] [2021-12-06 22:59:48,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:48,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:59:48,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:48,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:59:48,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:59:48,765 INFO L87 Difference]: Start difference. First operand 14073 states and 19919 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 22:59:49,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:59:49,161 INFO L93 Difference]: Finished difference Result 22641 states and 31918 transitions. [2021-12-06 22:59:49,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:59:49,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2021-12-06 22:59:49,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:59:49,183 INFO L225 Difference]: With dead ends: 22641 [2021-12-06 22:59:49,183 INFO L226 Difference]: Without dead ends: 14865 [2021-12-06 22:59:49,189 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 22:59:49,190 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 69 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 292 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 22:59:49,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 292 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:59:49,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14865 states. [2021-12-06 22:59:49,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14865 to 14161. [2021-12-06 22:59:49,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14161 states, 14160 states have (on average 1.3921610169491525) internal successors, (19713), 14160 states have internal predecessors, (19713), 0 states have call successors, (0), 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 22:59:49,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14161 states to 14161 states and 19713 transitions. [2021-12-06 22:59:49,681 INFO L78 Accepts]: Start accepts. Automaton has 14161 states and 19713 transitions. Word has length 82 [2021-12-06 22:59:49,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:59:49,681 INFO L470 AbstractCegarLoop]: Abstraction has 14161 states and 19713 transitions. [2021-12-06 22:59:49,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 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 22:59:49,682 INFO L276 IsEmpty]: Start isEmpty. Operand 14161 states and 19713 transitions. [2021-12-06 22:59:49,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 22:59:49,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:59:49,687 INFO L514 BasicCegarLoop]: trace histogram [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 22:59:49,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 22:59:49,688 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:59:49,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:49,688 INFO L85 PathProgramCache]: Analyzing trace with hash 54798832, now seen corresponding path program 1 times [2021-12-06 22:59:49,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:49,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451150166] [2021-12-06 22:59:49,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:49,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:49,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:49,739 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 22:59:49,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:49,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451150166] [2021-12-06 22:59:49,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451150166] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:49,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:49,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:59:49,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845590204] [2021-12-06 22:59:49,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:49,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:59:49,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:49,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:59:49,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:59:49,741 INFO L87 Difference]: Start difference. First operand 14161 states and 19713 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 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 22:59:50,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:59:50,345 INFO L93 Difference]: Finished difference Result 22780 states and 32064 transitions. [2021-12-06 22:59:50,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:59:50,346 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 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 82 [2021-12-06 22:59:50,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:59:50,366 INFO L225 Difference]: With dead ends: 22780 [2021-12-06 22:59:50,366 INFO L226 Difference]: Without dead ends: 20918 [2021-12-06 22:59:50,372 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 22:59:50,372 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 627 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:59:50,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 763 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:59:50,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20918 states. [2021-12-06 22:59:50,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20918 to 15973. [2021-12-06 22:59:50,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15973 states, 15972 states have (on average 1.3940020035061358) internal successors, (22265), 15972 states have internal predecessors, (22265), 0 states have call successors, (0), 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 22:59:50,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15973 states to 15973 states and 22265 transitions. [2021-12-06 22:59:50,842 INFO L78 Accepts]: Start accepts. Automaton has 15973 states and 22265 transitions. Word has length 82 [2021-12-06 22:59:50,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:59:50,842 INFO L470 AbstractCegarLoop]: Abstraction has 15973 states and 22265 transitions. [2021-12-06 22:59:50,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 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 22:59:50,843 INFO L276 IsEmpty]: Start isEmpty. Operand 15973 states and 22265 transitions. [2021-12-06 22:59:50,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-06 22:59:50,847 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:59:50,847 INFO L514 BasicCegarLoop]: trace histogram [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 22:59:50,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 22:59:50,847 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:59:50,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:50,847 INFO L85 PathProgramCache]: Analyzing trace with hash -273458928, now seen corresponding path program 1 times [2021-12-06 22:59:50,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:50,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025024189] [2021-12-06 22:59:50,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:50,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:50,889 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:59:50,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:50,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025024189] [2021-12-06 22:59:50,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025024189] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:59:50,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:59:50,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:59:50,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077238226] [2021-12-06 22:59:50,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:59:50,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:59:50,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:50,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:59:50,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:59:50,890 INFO L87 Difference]: Start difference. First operand 15973 states and 22265 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 22:59:51,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:59:51,484 INFO L93 Difference]: Finished difference Result 28973 states and 40771 transitions. [2021-12-06 22:59:51,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:59:51,484 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 82 [2021-12-06 22:59:51,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:59:51,504 INFO L225 Difference]: With dead ends: 28973 [2021-12-06 22:59:51,505 INFO L226 Difference]: Without dead ends: 24433 [2021-12-06 22:59:51,512 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 22:59:51,513 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 589 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:59:51,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 845 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:59:51,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24433 states. [2021-12-06 22:59:52,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24433 to 20069. [2021-12-06 22:59:52,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20069 states, 20068 states have (on average 1.393711381303568) internal successors, (27969), 20068 states have internal predecessors, (27969), 0 states have call successors, (0), 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 22:59:52,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20069 states to 20069 states and 27969 transitions. [2021-12-06 22:59:52,117 INFO L78 Accepts]: Start accepts. Automaton has 20069 states and 27969 transitions. Word has length 82 [2021-12-06 22:59:52,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:59:52,117 INFO L470 AbstractCegarLoop]: Abstraction has 20069 states and 27969 transitions. [2021-12-06 22:59:52,117 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 22:59:52,117 INFO L276 IsEmpty]: Start isEmpty. Operand 20069 states and 27969 transitions. [2021-12-06 22:59:52,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 22:59:52,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:59:52,122 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] [2021-12-06 22:59:52,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 22:59:52,122 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 22:59:52,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:59:52,122 INFO L85 PathProgramCache]: Analyzing trace with hash -90302852, now seen corresponding path program 1 times [2021-12-06 22:59:52,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:59:52,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041628996] [2021-12-06 22:59:52,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:52,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:59:52,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:59:52,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:59:52,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041628996] [2021-12-06 22:59:52,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041628996] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:59:52,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458185168] [2021-12-06 22:59:52,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:59:52,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:59:52,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:59:52,272 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:59:52,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 22:59:52,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:59:52,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 22:59:52,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:59:52,662 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 22:59:52,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:59:52,823 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 22:59:52,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458185168] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:59:52,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:59:52,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2021-12-06 22:59:52,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674962998] [2021-12-06 22:59:52,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:59:52,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-06 22:59:52,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:59:52,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-06 22:59:52,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-06 22:59:52,825 INFO L87 Difference]: Start difference. First operand 20069 states and 27969 transitions. Second operand has 14 states, 14 states have (on average 16.785714285714285) internal successors, (235), 14 states have internal predecessors, (235), 0 states have call successors, (0), 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 23:00:03,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:00:03,829 INFO L93 Difference]: Finished difference Result 248164 states and 344247 transitions. [2021-12-06 23:00:03,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-12-06 23:00:03,830 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 16.785714285714285) internal successors, (235), 14 states have internal predecessors, (235), 0 states have call successors, (0), 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 83 [2021-12-06 23:00:03,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:00:04,112 INFO L225 Difference]: With dead ends: 248164 [2021-12-06 23:00:04,113 INFO L226 Difference]: Without dead ends: 228820 [2021-12-06 23:00:04,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3782 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1857, Invalid=7455, Unknown=0, NotChecked=0, Total=9312 [2021-12-06 23:00:04,165 INFO L933 BasicCegarLoop]: 400 mSDtfsCounter, 6684 mSDsluCounter, 2241 mSDsCounter, 0 mSdLazyCounter, 1985 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6684 SdHoareTripleChecker+Valid, 2641 SdHoareTripleChecker+Invalid, 2219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-06 23:00:04,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6684 Valid, 2641 Invalid, 2219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1985 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-06 23:00:04,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228820 states. [2021-12-06 23:00:10,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228820 to 136796. [2021-12-06 23:00:10,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136796 states, 136795 states have (on average 1.3697649767900875) internal successors, (187377), 136795 states have internal predecessors, (187377), 0 states have call successors, (0), 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 23:00:10,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136796 states to 136796 states and 187377 transitions. [2021-12-06 23:00:10,331 INFO L78 Accepts]: Start accepts. Automaton has 136796 states and 187377 transitions. Word has length 83 [2021-12-06 23:00:10,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:00:10,332 INFO L470 AbstractCegarLoop]: Abstraction has 136796 states and 187377 transitions. [2021-12-06 23:00:10,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.785714285714285) internal successors, (235), 14 states have internal predecessors, (235), 0 states have call successors, (0), 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 23:00:10,332 INFO L276 IsEmpty]: Start isEmpty. Operand 136796 states and 187377 transitions. [2021-12-06 23:00:10,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 23:00:10,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:00:10,340 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] [2021-12-06 23:00:10,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 23:00:10,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 23:00:10,542 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:00:10,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:00:10,543 INFO L85 PathProgramCache]: Analyzing trace with hash 147462531, now seen corresponding path program 1 times [2021-12-06 23:00:10,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:00:10,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659683252] [2021-12-06 23:00:10,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:00:10,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:00:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:10,599 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 23:00:10,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:00:10,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659683252] [2021-12-06 23:00:10,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659683252] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:00:10,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:00:10,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:00:10,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217582061] [2021-12-06 23:00:10,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:00:10,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:00:10,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:00:10,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:00:10,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:00:10,601 INFO L87 Difference]: Start difference. First operand 136796 states and 187377 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 23:00:19,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:00:19,735 INFO L93 Difference]: Finished difference Result 382129 states and 521199 transitions. [2021-12-06 23:00:19,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:00:19,736 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 23:00:19,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:00:20,078 INFO L225 Difference]: With dead ends: 382129 [2021-12-06 23:00:20,078 INFO L226 Difference]: Without dead ends: 255912 [2021-12-06 23:00:20,159 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 23:00:20,159 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 64 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 260 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 23:00:20,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 260 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:00:20,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255912 states. [2021-12-06 23:00:30,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255912 to 255872. [2021-12-06 23:00:30,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255872 states, 255871 states have (on average 1.3479565874991695) internal successors, (344903), 255871 states have internal predecessors, (344903), 0 states have call successors, (0), 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 23:00:31,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255872 states to 255872 states and 344903 transitions. [2021-12-06 23:00:31,057 INFO L78 Accepts]: Start accepts. Automaton has 255872 states and 344903 transitions. Word has length 84 [2021-12-06 23:00:31,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:00:31,057 INFO L470 AbstractCegarLoop]: Abstraction has 255872 states and 344903 transitions. [2021-12-06 23:00:31,057 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 23:00:31,058 INFO L276 IsEmpty]: Start isEmpty. Operand 255872 states and 344903 transitions. [2021-12-06 23:00:31,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 23:00:31,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:00:31,070 INFO L514 BasicCegarLoop]: trace histogram [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 23:00:31,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 23:00:31,070 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:00:31,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:00:31,071 INFO L85 PathProgramCache]: Analyzing trace with hash -788693043, now seen corresponding path program 1 times [2021-12-06 23:00:31,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:00:31,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641498678] [2021-12-06 23:00:31,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:00:31,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:00:31,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:31,094 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:00:31,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:00:31,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641498678] [2021-12-06 23:00:31,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641498678] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:00:31,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:00:31,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:00:31,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899866145] [2021-12-06 23:00:31,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:00:31,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:00:31,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:00:31,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:00:31,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:00:31,096 INFO L87 Difference]: Start difference. First operand 255872 states and 344903 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 23:00:44,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:00:44,486 INFO L93 Difference]: Finished difference Result 585608 states and 785922 transitions. [2021-12-06 23:00:44,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:00:44,487 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 23:00:44,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:00:44,984 INFO L225 Difference]: With dead ends: 585608 [2021-12-06 23:00:44,984 INFO L226 Difference]: Without dead ends: 358042 [2021-12-06 23:00:45,100 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 23:00:45,101 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 67 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 314 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 23:00:45,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 314 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:00:45,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358042 states. [2021-12-06 23:00:57,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358042 to 280316. [2021-12-06 23:00:57,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280316 states, 280315 states have (on average 1.3327934644953) internal successors, (373602), 280315 states have internal predecessors, (373602), 0 states have call successors, (0), 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 23:00:57,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280316 states to 280316 states and 373602 transitions. [2021-12-06 23:00:57,793 INFO L78 Accepts]: Start accepts. Automaton has 280316 states and 373602 transitions. Word has length 85 [2021-12-06 23:00:57,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:00:57,794 INFO L470 AbstractCegarLoop]: Abstraction has 280316 states and 373602 transitions. [2021-12-06 23:00:57,794 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 23:00:57,794 INFO L276 IsEmpty]: Start isEmpty. Operand 280316 states and 373602 transitions. [2021-12-06 23:00:57,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 23:00:57,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:00:57,808 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 23:00:57,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 23:00:57,808 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:00:57,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:00:57,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1181693530, now seen corresponding path program 1 times [2021-12-06 23:00:57,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:00:57,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605850763] [2021-12-06 23:00:57,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:00:57,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:00:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:00:57,844 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 23:00:57,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:00:57,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605850763] [2021-12-06 23:00:57,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605850763] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:00:57,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:00:57,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 23:00:57,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609056591] [2021-12-06 23:00:57,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:00:57,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:00:57,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:00:57,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:00:57,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:00:57,845 INFO L87 Difference]: Start difference. First operand 280316 states and 373602 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 23:01:13,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:01:13,747 INFO L93 Difference]: Finished difference Result 479423 states and 643391 transitions. [2021-12-06 23:01:13,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:01:13,748 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 23:01:13,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:01:14,373 INFO L225 Difference]: With dead ends: 479423 [2021-12-06 23:01:14,373 INFO L226 Difference]: Without dead ends: 423620 [2021-12-06 23:01:14,463 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 23:01:14,463 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 583 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 806 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 23:01:14,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [583 Valid, 806 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:01:14,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423620 states. [2021-12-06 23:01:28,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423620 to 318667. [2021-12-06 23:01:28,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318667 states, 318666 states have (on average 1.3329002780340544) internal successors, (424750), 318666 states have internal predecessors, (424750), 0 states have call successors, (0), 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 23:01:29,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318667 states to 318667 states and 424750 transitions. [2021-12-06 23:01:29,603 INFO L78 Accepts]: Start accepts. Automaton has 318667 states and 424750 transitions. Word has length 85 [2021-12-06 23:01:29,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:01:29,603 INFO L470 AbstractCegarLoop]: Abstraction has 318667 states and 424750 transitions. [2021-12-06 23:01:29,603 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 23:01:29,603 INFO L276 IsEmpty]: Start isEmpty. Operand 318667 states and 424750 transitions. [2021-12-06 23:01:29,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-06 23:01:29,745 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:01:29,745 INFO L514 BasicCegarLoop]: trace histogram [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 23:01:29,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 23:01:29,745 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:01:29,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:01:29,745 INFO L85 PathProgramCache]: Analyzing trace with hash 105858641, now seen corresponding path program 1 times [2021-12-06 23:01:29,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:01:29,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075583233] [2021-12-06 23:01:29,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:01:29,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:01:29,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:01:29,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:01:29,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075583233] [2021-12-06 23:01:29,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075583233] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:01:29,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934432762] [2021-12-06 23:01:29,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:01:29,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:01:29,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:01:29,790 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:01:29,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 23:01:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:01:29,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:01:29,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:01:30,035 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:01:30,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:01:30,133 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:01:30,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934432762] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:01:30,134 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:01:30,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-06 23:01:30,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110300917] [2021-12-06 23:01:30,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:01:30,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 23:01:30,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:01:30,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 23:01:30,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:01:30,136 INFO L87 Difference]: Start difference. First operand 318667 states and 424750 transitions. Second operand has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 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 23:01:59,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:01:59,286 INFO L93 Difference]: Finished difference Result 880600 states and 1173366 transitions. [2021-12-06 23:01:59,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 23:01:59,287 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 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 86 [2021-12-06 23:01:59,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:02:00,321 INFO L225 Difference]: With dead ends: 880600 [2021-12-06 23:02:00,321 INFO L226 Difference]: Without dead ends: 673364 [2021-12-06 23:02:00,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 166 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 23:02:00,479 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 1338 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1338 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:02:00,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1338 Valid, 517 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:02:00,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673364 states. [2021-12-06 23:02:20,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673364 to 379943. [2021-12-06 23:02:20,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379943 states, 379942 states have (on average 1.3353380252775424) internal successors, (507351), 379942 states have internal predecessors, (507351), 0 states have call successors, (0), 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 23:02:21,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379943 states to 379943 states and 507351 transitions. [2021-12-06 23:02:21,291 INFO L78 Accepts]: Start accepts. Automaton has 379943 states and 507351 transitions. Word has length 86 [2021-12-06 23:02:21,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:02:21,291 INFO L470 AbstractCegarLoop]: Abstraction has 379943 states and 507351 transitions. [2021-12-06 23:02:21,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 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 23:02:21,292 INFO L276 IsEmpty]: Start isEmpty. Operand 379943 states and 507351 transitions. [2021-12-06 23:02:21,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-06 23:02:21,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:02:21,307 INFO L514 BasicCegarLoop]: trace histogram [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 23:02:21,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 23:02:21,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:02:21,509 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:02:21,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:02:21,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1873255199, now seen corresponding path program 1 times [2021-12-06 23:02:21,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:02:21,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73604699] [2021-12-06 23:02:21,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:02:21,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:02:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:02:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-06 23:02:21,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:02:21,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73604699] [2021-12-06 23:02:21,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73604699] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:02:21,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:02:21,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:02:21,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746189268] [2021-12-06 23:02:21,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:02:21,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:02:21,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:02:21,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:02:21,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:02:21,711 INFO L87 Difference]: Start difference. First operand 379943 states and 507351 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 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 23:02:41,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:02:41,948 INFO L93 Difference]: Finished difference Result 794340 states and 1058268 transitions. [2021-12-06 23:02:41,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:02:41,949 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 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 86 [2021-12-06 23:02:41,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:02:42,548 INFO L225 Difference]: With dead ends: 794340 [2021-12-06 23:02:42,549 INFO L226 Difference]: Without dead ends: 414516 [2021-12-06 23:02:42,712 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 23:02:42,713 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 636 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:02:42,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 207 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:02:43,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414516 states. [2021-12-06 23:03:03,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414516 to 403150. [2021-12-06 23:03:03,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403150 states, 403149 states have (on average 1.316768738109235) internal successors, (530854), 403149 states have internal predecessors, (530854), 0 states have call successors, (0), 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 23:03:04,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403150 states to 403150 states and 530854 transitions. [2021-12-06 23:03:04,640 INFO L78 Accepts]: Start accepts. Automaton has 403150 states and 530854 transitions. Word has length 86 [2021-12-06 23:03:04,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:03:04,640 INFO L470 AbstractCegarLoop]: Abstraction has 403150 states and 530854 transitions. [2021-12-06 23:03:04,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 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 23:03:04,640 INFO L276 IsEmpty]: Start isEmpty. Operand 403150 states and 530854 transitions. [2021-12-06 23:03:04,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-06 23:03:04,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:03:04,650 INFO L514 BasicCegarLoop]: trace histogram [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 23:03:04,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 23:03:04,651 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:03:04,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:03:04,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1308309177, now seen corresponding path program 1 times [2021-12-06 23:03:04,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:03:04,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849788489] [2021-12-06 23:03:04,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:03:04,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:03:04,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:04,705 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:03:04,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:03:04,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849788489] [2021-12-06 23:03:04,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849788489] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:03:04,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324130734] [2021-12-06 23:03:04,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:03:04,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:03:04,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:03:04,707 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:03:04,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 23:03:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:03:04,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:03:04,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:03:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:03:04,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:03:05,044 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:03:05,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324130734] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:03:05,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:03:05,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-06 23:03:05,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645825401] [2021-12-06 23:03:05,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:03:05,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 23:03:05,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:03:05,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 23:03:05,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:03:05,046 INFO L87 Difference]: Start difference. First operand 403150 states and 530854 transitions. Second operand has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 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 23:03:43,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:03:43,444 INFO L93 Difference]: Finished difference Result 1059761 states and 1395832 transitions. [2021-12-06 23:03:43,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 23:03:43,445 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 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 86 [2021-12-06 23:03:43,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:03:44,481 INFO L225 Difference]: With dead ends: 1059761 [2021-12-06 23:03:44,481 INFO L226 Difference]: Without dead ends: 708652 [2021-12-06 23:03:44,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-12-06 23:03:44,694 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 2223 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2223 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:03:44,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2223 Valid, 418 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:03:45,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708652 states. [2021-12-06 23:04:08,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708652 to 402900. [2021-12-06 23:04:08,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402900 states, 402899 states have (on average 1.3237908259886473) internal successors, (533354), 402899 states have internal predecessors, (533354), 0 states have call successors, (0), 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 23:04:09,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402900 states to 402900 states and 533354 transitions. [2021-12-06 23:04:09,780 INFO L78 Accepts]: Start accepts. Automaton has 402900 states and 533354 transitions. Word has length 86 [2021-12-06 23:04:09,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:04:09,780 INFO L470 AbstractCegarLoop]: Abstraction has 402900 states and 533354 transitions. [2021-12-06 23:04:09,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 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 23:04:09,780 INFO L276 IsEmpty]: Start isEmpty. Operand 402900 states and 533354 transitions. [2021-12-06 23:04:09,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-06 23:04:09,791 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:04:09,791 INFO L514 BasicCegarLoop]: trace histogram [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 23:04:09,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 23:04:09,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:04:09,993 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:04:09,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:04:09,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1155556519, now seen corresponding path program 1 times [2021-12-06 23:04:09,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:04:09,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092463125] [2021-12-06 23:04:09,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:04:09,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:04:10,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:04:10,027 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 23:04:10,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:04:10,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092463125] [2021-12-06 23:04:10,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092463125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:04:10,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:04:10,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 23:04:10,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935365539] [2021-12-06 23:04:10,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:04:10,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 23:04:10,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:04:10,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 23:04:10,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 23:04:10,028 INFO L87 Difference]: Start difference. First operand 402900 states and 533354 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 23:04:27,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:04:27,019 INFO L93 Difference]: Finished difference Result 704233 states and 927511 transitions. [2021-12-06 23:04:27,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 23:04:27,020 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 23:04:27,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:04:27,596 INFO L225 Difference]: With dead ends: 704233 [2021-12-06 23:04:27,597 INFO L226 Difference]: Without dead ends: 301467 [2021-12-06 23:04:27,762 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 23:04:27,763 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 66 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 280 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 23:04:27,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 280 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 23:04:27,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301467 states. [2021-12-06 23:04:45,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301467 to 301322. [2021-12-06 23:04:45,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301322 states, 301321 states have (on average 1.2929102186704544) internal successors, (389581), 301321 states have internal predecessors, (389581), 0 states have call successors, (0), 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 23:04:45,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301322 states to 301322 states and 389581 transitions. [2021-12-06 23:04:45,946 INFO L78 Accepts]: Start accepts. Automaton has 301322 states and 389581 transitions. Word has length 87 [2021-12-06 23:04:45,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:04:45,946 INFO L470 AbstractCegarLoop]: Abstraction has 301322 states and 389581 transitions. [2021-12-06 23:04:45,946 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 23:04:45,946 INFO L276 IsEmpty]: Start isEmpty. Operand 301322 states and 389581 transitions. [2021-12-06 23:04:45,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 23:04:45,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:04:45,952 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 23:04:45,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 23:04:45,953 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:04:45,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:04:45,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1102169944, now seen corresponding path program 1 times [2021-12-06 23:04:45,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:04:45,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210182689] [2021-12-06 23:04:45,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:04:45,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:04:45,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:04:46,053 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 23:04:46,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:04:46,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210182689] [2021-12-06 23:04:46,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210182689] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:04:46,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630407228] [2021-12-06 23:04:46,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:04:46,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:04:46,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:04:46,054 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:04:46,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 23:04:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:04:46,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-06 23:04:46,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:04:46,532 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 23:04:46,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:04:47,155 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 23:04:47,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630407228] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:04:47,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:04:47,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-06 23:04:47,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417928322] [2021-12-06 23:04:47,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:04:47,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 23:04:47,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:04:47,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 23:04:47,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-12-06 23:04:47,157 INFO L87 Difference]: Start difference. First operand 301322 states and 389581 transitions. Second operand has 21 states, 21 states have (on average 9.619047619047619) internal successors, (202), 20 states have internal predecessors, (202), 0 states have call successors, (0), 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 23:05:46,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:05:46,413 INFO L93 Difference]: Finished difference Result 1145676 states and 1469809 transitions. [2021-12-06 23:05:46,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 23:05:46,414 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 9.619047619047619) internal successors, (202), 20 states have internal predecessors, (202), 0 states have call successors, (0), 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 23:05:46,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:05:47,992 INFO L225 Difference]: With dead ends: 1145676 [2021-12-06 23:05:47,992 INFO L226 Difference]: Without dead ends: 974589 [2021-12-06 23:05:48,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=456, Invalid=1266, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 23:05:48,190 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 1199 mSDsluCounter, 2184 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1199 SdHoareTripleChecker+Valid, 2415 SdHoareTripleChecker+Invalid, 1500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 23:05:48,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1199 Valid, 2415 Invalid, 1500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 23:05:48,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974589 states. [2021-12-06 23:06:21,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974589 to 481849. [2021-12-06 23:06:22,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481849 states, 481848 states have (on average 1.2878604871245705) internal successors, (620553), 481848 states have internal predecessors, (620553), 0 states have call successors, (0), 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 23:06:23,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481849 states to 481849 states and 620553 transitions. [2021-12-06 23:06:23,383 INFO L78 Accepts]: Start accepts. Automaton has 481849 states and 620553 transitions. Word has length 89 [2021-12-06 23:06:23,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:06:23,384 INFO L470 AbstractCegarLoop]: Abstraction has 481849 states and 620553 transitions. [2021-12-06 23:06:23,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.619047619047619) internal successors, (202), 20 states have internal predecessors, (202), 0 states have call successors, (0), 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 23:06:23,384 INFO L276 IsEmpty]: Start isEmpty. Operand 481849 states and 620553 transitions. [2021-12-06 23:06:23,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 23:06:23,391 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:06:23,391 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 23:06:23,411 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 23:06:23,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:06:23,593 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:06:23,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:06:23,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1820990054, now seen corresponding path program 1 times [2021-12-06 23:06:23,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:06:23,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393969433] [2021-12-06 23:06:23,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:06:23,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:06:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:06:23,703 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 23:06:23,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:06:23,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393969433] [2021-12-06 23:06:23,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393969433] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:06:23,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:06:23,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:06:23,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288977320] [2021-12-06 23:06:23,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:06:23,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:06:23,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:06:23,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:06:23,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:06:23,705 INFO L87 Difference]: Start difference. First operand 481849 states and 620553 transitions. Second operand has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 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 23:07:01,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:07:01,228 INFO L93 Difference]: Finished difference Result 1054676 states and 1359682 transitions. [2021-12-06 23:07:01,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:07:01,229 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 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 23:07:01,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:07:02,064 INFO L225 Difference]: With dead ends: 1054676 [2021-12-06 23:07:02,064 INFO L226 Difference]: Without dead ends: 573136 [2021-12-06 23:07:02,269 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 23:07:02,270 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 588 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:07:02,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 191 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:07:02,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573136 states. [2021-12-06 23:07:40,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573136 to 565893. [2021-12-06 23:07:41,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565893 states, 565892 states have (on average 1.2818435319813675) internal successors, (725385), 565892 states have internal predecessors, (725385), 0 states have call successors, (0), 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 23:07:42,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565893 states to 565893 states and 725385 transitions. [2021-12-06 23:07:42,662 INFO L78 Accepts]: Start accepts. Automaton has 565893 states and 725385 transitions. Word has length 89 [2021-12-06 23:07:42,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:07:42,662 INFO L470 AbstractCegarLoop]: Abstraction has 565893 states and 725385 transitions. [2021-12-06 23:07:42,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.333333333333334) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 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 23:07:42,663 INFO L276 IsEmpty]: Start isEmpty. Operand 565893 states and 725385 transitions. [2021-12-06 23:07:42,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 23:07:42,672 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:07:42,672 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 23:07:42,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-06 23:07:42,673 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:07:42,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:07:42,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1389050491, now seen corresponding path program 1 times [2021-12-06 23:07:42,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:07:42,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900496840] [2021-12-06 23:07:42,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:07:42,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:07:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:07:42,713 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 23:07:42,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:07:42,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900496840] [2021-12-06 23:07:42,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900496840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 23:07:42,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 23:07:42,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 23:07:42,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277808861] [2021-12-06 23:07:42,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 23:07:42,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 23:07:42,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:07:42,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 23:07:42,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 23:07:42,715 INFO L87 Difference]: Start difference. First operand 565893 states and 725385 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 23:08:35,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:08:35,954 INFO L93 Difference]: Finished difference Result 1338971 states and 1709106 transitions. [2021-12-06 23:08:35,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 23:08:35,954 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 23:08:35,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:08:37,223 INFO L225 Difference]: With dead ends: 1338971 [2021-12-06 23:08:37,223 INFO L226 Difference]: Without dead ends: 773341 [2021-12-06 23:08:37,500 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 23:08:37,500 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 750 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:08:37,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [750 Valid, 231 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:08:38,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773341 states. [2021-12-06 23:09:17,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773341 to 565893. [2021-12-06 23:09:18,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565893 states, 565892 states have (on average 1.2742537445307585) internal successors, (721090), 565892 states have internal predecessors, (721090), 0 states have call successors, (0), 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 23:09:19,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565893 states to 565893 states and 721090 transitions. [2021-12-06 23:09:19,568 INFO L78 Accepts]: Start accepts. Automaton has 565893 states and 721090 transitions. Word has length 89 [2021-12-06 23:09:19,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 23:09:19,568 INFO L470 AbstractCegarLoop]: Abstraction has 565893 states and 721090 transitions. [2021-12-06 23:09:19,568 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 23:09:19,568 INFO L276 IsEmpty]: Start isEmpty. Operand 565893 states and 721090 transitions. [2021-12-06 23:09:19,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 23:09:19,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 23:09:19,575 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 23:09:19,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-06 23:09:19,575 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 23:09:19,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 23:09:19,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1348375741, now seen corresponding path program 1 times [2021-12-06 23:09:19,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 23:09:19,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748283226] [2021-12-06 23:09:19,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:09:19,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 23:09:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:19,614 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 23:09:19,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 23:09:19,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748283226] [2021-12-06 23:09:19,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748283226] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 23:09:19,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065349881] [2021-12-06 23:09:19,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 23:09:19,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 23:09:19,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 23:09:19,615 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 23:09:19,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f63e32-b765-4fa1-9ce3-6d5be02b777a/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 23:09:19,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 23:09:19,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 23:09:19,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 23:09:19,839 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 23:09:19,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 23:09:19,942 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 23:09:19,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065349881] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 23:09:19,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 23:09:19,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-06 23:09:19,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620776596] [2021-12-06 23:09:19,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 23:09:19,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 23:09:19,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 23:09:19,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 23:09:19,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-06 23:09:19,944 INFO L87 Difference]: Start difference. First operand 565893 states and 721090 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 23:10:23,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 23:10:23,163 INFO L93 Difference]: Finished difference Result 1107356 states and 1407105 transitions. [2021-12-06 23:10:23,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 23:10:23,164 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 23:10:23,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 23:10:24,683 INFO L225 Difference]: With dead ends: 1107356 [2021-12-06 23:10:24,684 INFO L226 Difference]: Without dead ends: 896947 [2021-12-06 23:10:24,880 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 23:10:24,881 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 902 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 23:10:24,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [902 Valid, 493 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 23:10:25,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896947 states.