./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de31.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de31.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8 --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 28f1f7a35f3c64149ac63836a12126d2f43ea1d4c4384507ba9d3ae156113818 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 20:02:55,454 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 20:02:55,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 20:02:55,474 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 20:02:55,474 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 20:02:55,475 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 20:02:55,477 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 20:02:55,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 20:02:55,479 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 20:02:55,480 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 20:02:55,481 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 20:02:55,482 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 20:02:55,483 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 20:02:55,484 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 20:02:55,485 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 20:02:55,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 20:02:55,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 20:02:55,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 20:02:55,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 20:02:55,490 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 20:02:55,492 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 20:02:55,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 20:02:55,494 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 20:02:55,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 20:02:55,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 20:02:55,499 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 20:02:55,499 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 20:02:55,500 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 20:02:55,500 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 20:02:55,501 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 20:02:55,502 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 20:02:55,502 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 20:02:55,503 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 20:02:55,504 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 20:02:55,505 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 20:02:55,505 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 20:02:55,506 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 20:02:55,506 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 20:02:55,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 20:02:55,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 20:02:55,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 20:02:55,508 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 20:02:55,529 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 20:02:55,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 20:02:55,529 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 20:02:55,530 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 20:02:55,530 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 20:02:55,530 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 20:02:55,531 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 20:02:55,531 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 20:02:55,531 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 20:02:55,532 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 20:02:55,532 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 20:02:55,532 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 20:02:55,532 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 20:02:55,532 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 20:02:55,533 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 20:02:55,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 20:02:55,533 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 20:02:55,533 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 20:02:55,533 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 20:02:55,533 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 20:02:55,534 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 20:02:55,534 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 20:02:55,534 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 20:02:55,534 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 20:02:55,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:02:55,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 20:02:55,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 20:02:55,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 20:02:55,535 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 20:02:55,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 20:02:55,536 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 20:02:55,536 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 20:02:55,536 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 20:02:55,536 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 20:02:55,536 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 20:02:55,536 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 28f1f7a35f3c64149ac63836a12126d2f43ea1d4c4384507ba9d3ae156113818 [2022-12-13 20:02:55,727 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 20:02:55,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 20:02:55,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 20:02:55,751 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 20:02:55,752 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 20:02:55,753 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/loops-crafted-1/in-de31.c [2022-12-13 20:02:58,328 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 20:02:58,483 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 20:02:58,483 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/sv-benchmarks/c/loops-crafted-1/in-de31.c [2022-12-13 20:02:58,487 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/data/a87937596/cb6c2f21974b461c9feaa0a99fabaafc/FLAGd72305378 [2022-12-13 20:02:58,498 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/data/a87937596/cb6c2f21974b461c9feaa0a99fabaafc [2022-12-13 20:02:58,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 20:02:58,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 20:02:58,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 20:02:58,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 20:02:58,505 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 20:02:58,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:02:58" (1/1) ... [2022-12-13 20:02:58,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54fb5bbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:02:58, skipping insertion in model container [2022-12-13 20:02:58,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:02:58" (1/1) ... [2022-12-13 20:02:58,512 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 20:02:58,524 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 20:02:58,635 WARN L237 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_82de57fe-e741-4d8c-9a49-73f9f40faaf7/sv-benchmarks/c/loops-crafted-1/in-de31.c[368,381] [2022-12-13 20:02:58,646 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:02:58,654 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 20:02:58,663 WARN L237 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_82de57fe-e741-4d8c-9a49-73f9f40faaf7/sv-benchmarks/c/loops-crafted-1/in-de31.c[368,381] [2022-12-13 20:02:58,666 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:02:58,677 INFO L208 MainTranslator]: Completed translation [2022-12-13 20:02:58,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:02:58 WrapperNode [2022-12-13 20:02:58,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 20:02:58,679 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 20:02:58,679 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 20:02:58,679 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 20:02:58,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:02:58" (1/1) ... [2022-12-13 20:02:58,690 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:02:58" (1/1) ... [2022-12-13 20:02:58,705 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2022-12-13 20:02:58,705 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 20:02:58,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 20:02:58,706 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 20:02:58,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 20:02:58,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:02:58" (1/1) ... [2022-12-13 20:02:58,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:02:58" (1/1) ... [2022-12-13 20:02:58,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:02:58" (1/1) ... [2022-12-13 20:02:58,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:02:58" (1/1) ... [2022-12-13 20:02:58,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:02:58" (1/1) ... [2022-12-13 20:02:58,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:02:58" (1/1) ... [2022-12-13 20:02:58,720 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:02:58" (1/1) ... [2022-12-13 20:02:58,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:02:58" (1/1) ... [2022-12-13 20:02:58,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 20:02:58,723 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 20:02:58,723 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 20:02:58,723 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 20:02:58,724 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:02:58" (1/1) ... [2022-12-13 20:02:58,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:02:58,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:02:58,748 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 20:02:58,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 20:02:58,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 20:02:58,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 20:02:58,780 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 20:02:58,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 20:02:58,837 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 20:02:58,839 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 20:02:58,920 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 20:02:58,925 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 20:02:58,925 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 20:02:58,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:02:58 BoogieIcfgContainer [2022-12-13 20:02:58,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 20:02:58,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 20:02:58,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 20:02:58,931 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 20:02:58,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 08:02:58" (1/3) ... [2022-12-13 20:02:58,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67055407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:02:58, skipping insertion in model container [2022-12-13 20:02:58,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:02:58" (2/3) ... [2022-12-13 20:02:58,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67055407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:02:58, skipping insertion in model container [2022-12-13 20:02:58,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:02:58" (3/3) ... [2022-12-13 20:02:58,933 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de31.c [2022-12-13 20:02:58,948 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 20:02:58,948 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 20:02:58,983 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 20:02:58,988 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@24ad291f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 20:02:58,988 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 20:02:58,991 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:02:58,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-13 20:02:58,995 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:02:58,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:02:58,996 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:02:59,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:02:59,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1157484939, now seen corresponding path program 1 times [2022-12-13 20:02:59,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:02:59,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365722799] [2022-12-13 20:02:59,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:02:59,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:02:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:02:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:02:59,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:02:59,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365722799] [2022-12-13 20:02:59,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365722799] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:02:59,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:02:59,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 20:02:59,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531268146] [2022-12-13 20:02:59,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:02:59,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 20:02:59,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:02:59,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 20:02:59,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-13 20:02:59,476 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:02:59,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:02:59,616 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2022-12-13 20:02:59,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 20:02:59,619 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2022-12-13 20:02:59,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:02:59,624 INFO L225 Difference]: With dead ends: 35 [2022-12-13 20:02:59,624 INFO L226 Difference]: Without dead ends: 11 [2022-12-13 20:02:59,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-13 20:02:59,629 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:02:59,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 40 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:02:59,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-12-13 20:02:59,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-12-13 20:02:59,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:02:59,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-12-13 20:02:59,651 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 9 [2022-12-13 20:02:59,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:02:59,651 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-12-13 20:02:59,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:02:59,652 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-12-13 20:02:59,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 20:02:59,652 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:02:59,652 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:02:59,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 20:02:59,653 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:02:59,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:02:59,653 INFO L85 PathProgramCache]: Analyzing trace with hash 722526704, now seen corresponding path program 1 times [2022-12-13 20:02:59,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:02:59,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412359375] [2022-12-13 20:02:59,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:02:59,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:02:59,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:02:59,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:02:59,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:02:59,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412359375] [2022-12-13 20:02:59,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412359375] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:02:59,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106876532] [2022-12-13 20:02:59,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:02:59,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:02:59,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:02:59,729 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:02:59,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 20:02:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:02:59,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 20:02:59,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:02:59,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:02:59,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:02:59,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:02:59,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106876532] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:02:59,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:02:59,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-12-13 20:02:59,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361279088] [2022-12-13 20:02:59,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:02:59,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 20:02:59,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:02:59,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 20:02:59,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-12-13 20:02:59,875 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:02:59,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:02:59,973 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2022-12-13 20:02:59,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 20:02:59,974 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 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 10 [2022-12-13 20:02:59,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:02:59,975 INFO L225 Difference]: With dead ends: 37 [2022-12-13 20:02:59,976 INFO L226 Difference]: Without dead ends: 32 [2022-12-13 20:02:59,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-12-13 20:02:59,977 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 33 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:02:59,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 32 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:02:59,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-13 20:02:59,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2022-12-13 20:02:59,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:02:59,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2022-12-13 20:02:59,983 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 10 [2022-12-13 20:02:59,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:02:59,983 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2022-12-13 20:02:59,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:02:59,984 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2022-12-13 20:02:59,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-13 20:02:59,984 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:02:59,984 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:02:59,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 20:03:00,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:03:00,187 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:03:00,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:03:00,189 INFO L85 PathProgramCache]: Analyzing trace with hash 19581631, now seen corresponding path program 1 times [2022-12-13 20:03:00,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:03:00,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914921337] [2022-12-13 20:03:00,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:03:00,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:03:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:03:00,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:00,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:03:00,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914921337] [2022-12-13 20:03:00,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914921337] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:03:00,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804045366] [2022-12-13 20:03:00,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:03:00,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:03:00,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:03:00,603 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:03:00,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 20:03:00,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:03:00,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 20:03:00,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:03:00,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:00,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:03:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:01,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804045366] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:03:01,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:03:01,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 19 [2022-12-13 20:03:01,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815088795] [2022-12-13 20:03:01,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:03:01,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 20:03:01,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:03:01,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 20:03:01,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-12-13 20:03:01,066 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:02,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:03:02,160 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2022-12-13 20:03:02,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 20:03:02,160 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 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 12 [2022-12-13 20:03:02,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:03:02,161 INFO L225 Difference]: With dead ends: 59 [2022-12-13 20:03:02,161 INFO L226 Difference]: Without dead ends: 43 [2022-12-13 20:03:02,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=276, Invalid=1130, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 20:03:02,162 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 91 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:03:02,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 40 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:03:02,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-13 20:03:02,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 20. [2022-12-13 20:03:02,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:02,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2022-12-13 20:03:02,173 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 12 [2022-12-13 20:03:02,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:03:02,174 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-12-13 20:03:02,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:02,174 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2022-12-13 20:03:02,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 20:03:02,175 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:03:02,175 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:03:02,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 20:03:02,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:03:02,377 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:03:02,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:03:02,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1563380427, now seen corresponding path program 2 times [2022-12-13 20:03:02,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:03:02,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274563627] [2022-12-13 20:03:02,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:03:02,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:03:02,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:03:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:02,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:03:02,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274563627] [2022-12-13 20:03:02,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274563627] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:03:02,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929784697] [2022-12-13 20:03:02,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:03:02,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:03:02,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:03:02,599 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:03:02,600 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 20:03:02,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:03:02,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:03:02,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 20:03:02,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:03:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:02,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:03:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:02,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929784697] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:03:02,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:03:02,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-12-13 20:03:02,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631955990] [2022-12-13 20:03:02,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:03:02,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-13 20:03:02,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:03:02,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-13 20:03:02,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-12-13 20:03:02,746 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:03,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:03:03,387 INFO L93 Difference]: Finished difference Result 75 states and 115 transitions. [2022-12-13 20:03:03,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 20:03:03,387 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 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 13 [2022-12-13 20:03:03,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:03:03,389 INFO L225 Difference]: With dead ends: 75 [2022-12-13 20:03:03,389 INFO L226 Difference]: Without dead ends: 70 [2022-12-13 20:03:03,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2022-12-13 20:03:03,390 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 175 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:03:03,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 66 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:03:03,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-12-13 20:03:03,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 39. [2022-12-13 20:03:03,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 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) [2022-12-13 20:03:03,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2022-12-13 20:03:03,401 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 13 [2022-12-13 20:03:03,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:03:03,402 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2022-12-13 20:03:03,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:03,402 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2022-12-13 20:03:03,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 20:03:03,402 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:03:03,403 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:03:03,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 20:03:03,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:03:03,604 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:03:03,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:03:03,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1098222449, now seen corresponding path program 2 times [2022-12-13 20:03:03,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:03:03,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275191562] [2022-12-13 20:03:03,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:03:03,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:03:03,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:03:03,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 20:03:03,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:03:03,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275191562] [2022-12-13 20:03:03,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275191562] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:03:03,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711387500] [2022-12-13 20:03:03,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:03:03,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:03:03,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:03:03,788 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:03:03,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 20:03:03,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:03:03,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:03:03,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 20:03:03,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:03:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 20:03:03,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:03:03,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 20:03:03,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711387500] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:03:03,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:03:03,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-12-13 20:03:03,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357839381] [2022-12-13 20:03:03,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:03:03,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 20:03:03,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:03:03,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 20:03:03,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-12-13 20:03:03,907 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:04,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:03:04,035 INFO L93 Difference]: Finished difference Result 72 states and 94 transitions. [2022-12-13 20:03:04,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 20:03:04,035 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 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 14 [2022-12-13 20:03:04,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:03:04,036 INFO L225 Difference]: With dead ends: 72 [2022-12-13 20:03:04,036 INFO L226 Difference]: Without dead ends: 62 [2022-12-13 20:03:04,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-12-13 20:03:04,037 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:03:04,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 34 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:03:04,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-12-13 20:03:04,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2022-12-13 20:03:04,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 45 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:04,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 64 transitions. [2022-12-13 20:03:04,059 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 64 transitions. Word has length 14 [2022-12-13 20:03:04,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:03:04,059 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 64 transitions. [2022-12-13 20:03:04,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:04,059 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 64 transitions. [2022-12-13 20:03:04,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-13 20:03:04,060 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:03:04,060 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:03:04,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 20:03:04,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:03:04,262 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:03:04,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:03:04,263 INFO L85 PathProgramCache]: Analyzing trace with hash 854515253, now seen corresponding path program 3 times [2022-12-13 20:03:04,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:03:04,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138639537] [2022-12-13 20:03:04,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:03:04,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:03:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:03:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:04,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:03:04,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138639537] [2022-12-13 20:03:04,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138639537] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:03:04,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888276114] [2022-12-13 20:03:04,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:03:04,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:03:04,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:03:04,739 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:03:04,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 20:03:04,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 20:03:04,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:03:04,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-13 20:03:04,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:03:04,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:04,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:03:05,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:05,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888276114] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:03:05,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:03:05,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-12-13 20:03:05,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55038059] [2022-12-13 20:03:05,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:03:05,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 20:03:05,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:03:05,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 20:03:05,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-12-13 20:03:05,198 INFO L87 Difference]: Start difference. First operand 46 states and 64 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:06,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:03:06,022 INFO L93 Difference]: Finished difference Result 97 states and 120 transitions. [2022-12-13 20:03:06,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 20:03:06,022 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-12-13 20:03:06,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:03:06,023 INFO L225 Difference]: With dead ends: 97 [2022-12-13 20:03:06,023 INFO L226 Difference]: Without dead ends: 73 [2022-12-13 20:03:06,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=264, Invalid=1628, Unknown=0, NotChecked=0, Total=1892 [2022-12-13 20:03:06,024 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 52 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:03:06,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 89 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:03:06,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-12-13 20:03:06,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2022-12-13 20:03:06,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.4) internal successors, (63), 45 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:06,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2022-12-13 20:03:06,037 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 15 [2022-12-13 20:03:06,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:03:06,037 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2022-12-13 20:03:06,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:06,037 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2022-12-13 20:03:06,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 20:03:06,037 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:03:06,038 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:03:06,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-13 20:03:06,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:03:06,240 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:03:06,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:03:06,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1966551549, now seen corresponding path program 4 times [2022-12-13 20:03:06,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:03:06,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588771453] [2022-12-13 20:03:06,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:03:06,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:03:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:03:06,338 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:03:06,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:03:06,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588771453] [2022-12-13 20:03:06,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588771453] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:03:06,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173684927] [2022-12-13 20:03:06,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 20:03:06,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:03:06,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:03:06,339 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:03:06,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 20:03:06,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 20:03:06,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:03:06,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 20:03:06,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:03:06,432 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:03:06,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:03:06,505 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-13 20:03:06,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173684927] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:03:06,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:03:06,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-12-13 20:03:06,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763586842] [2022-12-13 20:03:06,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:03:06,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 20:03:06,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:03:06,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 20:03:06,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-12-13 20:03:06,506 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 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) [2022-12-13 20:03:06,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:03:06,735 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2022-12-13 20:03:06,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 20:03:06,736 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 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 17 [2022-12-13 20:03:06,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:03:06,737 INFO L225 Difference]: With dead ends: 84 [2022-12-13 20:03:06,737 INFO L226 Difference]: Without dead ends: 69 [2022-12-13 20:03:06,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-12-13 20:03:06,738 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:03:06,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 81 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:03:06,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-12-13 20:03:06,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2022-12-13 20:03:06,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:06,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2022-12-13 20:03:06,761 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 17 [2022-12-13 20:03:06,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:03:06,761 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2022-12-13 20:03:06,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 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) [2022-12-13 20:03:06,761 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2022-12-13 20:03:06,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 20:03:06,762 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:03:06,762 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:03:06,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 20:03:06,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:03:06,964 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:03:06,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:03:06,965 INFO L85 PathProgramCache]: Analyzing trace with hash -73381852, now seen corresponding path program 5 times [2022-12-13 20:03:06,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:03:06,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036561636] [2022-12-13 20:03:06,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:03:06,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:03:07,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:03:07,113 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:03:07,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:03:07,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036561636] [2022-12-13 20:03:07,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036561636] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:03:07,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744498029] [2022-12-13 20:03:07,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 20:03:07,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:03:07,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:03:07,115 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:03:07,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 20:03:07,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 20:03:07,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:03:07,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 20:03:07,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:03:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:03:07,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:03:07,319 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:03:07,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744498029] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:03:07,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:03:07,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-12-13 20:03:07,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185083579] [2022-12-13 20:03:07,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:03:07,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-13 20:03:07,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:03:07,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-13 20:03:07,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-12-13 20:03:07,321 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:11,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:03:11,866 INFO L93 Difference]: Finished difference Result 154 states and 221 transitions. [2022-12-13 20:03:11,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-12-13 20:03:11,866 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-13 20:03:11,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:03:11,867 INFO L225 Difference]: With dead ends: 154 [2022-12-13 20:03:11,867 INFO L226 Difference]: Without dead ends: 145 [2022-12-13 20:03:11,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1699 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1418, Invalid=3838, Unknown=0, NotChecked=0, Total=5256 [2022-12-13 20:03:11,868 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 370 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 20:03:11,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 119 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 20:03:11,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-12-13 20:03:11,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 71. [2022-12-13 20:03:11,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.4) internal successors, (98), 70 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:11,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 98 transitions. [2022-12-13 20:03:11,887 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 98 transitions. Word has length 17 [2022-12-13 20:03:11,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:03:11,887 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 98 transitions. [2022-12-13 20:03:11,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:11,888 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 98 transitions. [2022-12-13 20:03:11,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-13 20:03:11,888 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:03:11,888 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:03:11,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 20:03:12,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 20:03:12,090 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:03:12,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:03:12,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1333529985, now seen corresponding path program 6 times [2022-12-13 20:03:12,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:03:12,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571961841] [2022-12-13 20:03:12,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:03:12,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:03:12,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:03:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:12,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:03:12,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571961841] [2022-12-13 20:03:12,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571961841] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:03:12,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731708241] [2022-12-13 20:03:12,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 20:03:12,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:03:12,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:03:12,502 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:03:12,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 20:03:12,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-12-13 20:03:12,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:03:12,553 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-13 20:03:12,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:03:12,845 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:12,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:03:13,208 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:13,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731708241] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:03:13,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:03:13,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 12] total 34 [2022-12-13 20:03:13,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783676173] [2022-12-13 20:03:13,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:03:13,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 20:03:13,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:03:13,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 20:03:13,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2022-12-13 20:03:13,211 INFO L87 Difference]: Start difference. First operand 71 states and 98 transitions. Second operand has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:14,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:03:14,937 INFO L93 Difference]: Finished difference Result 126 states and 159 transitions. [2022-12-13 20:03:14,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 20:03:14,937 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 states have internal predecessors, (48), 0 states have call successors, (0), 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 18 [2022-12-13 20:03:14,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:03:14,938 INFO L225 Difference]: With dead ends: 126 [2022-12-13 20:03:14,938 INFO L226 Difference]: Without dead ends: 99 [2022-12-13 20:03:14,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=361, Invalid=2501, Unknown=0, NotChecked=0, Total=2862 [2022-12-13 20:03:14,939 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 20:03:14,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 137 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 20:03:14,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-12-13 20:03:14,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70. [2022-12-13 20:03:14,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.3768115942028984) internal successors, (95), 69 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:14,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 95 transitions. [2022-12-13 20:03:14,964 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 95 transitions. Word has length 18 [2022-12-13 20:03:14,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:03:14,964 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 95 transitions. [2022-12-13 20:03:14,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:14,964 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 95 transitions. [2022-12-13 20:03:14,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-12-13 20:03:14,965 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:03:14,965 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:03:14,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 20:03:15,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:03:15,165 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:03:15,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:03:15,166 INFO L85 PathProgramCache]: Analyzing trace with hash 159423631, now seen corresponding path program 7 times [2022-12-13 20:03:15,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:03:15,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935883225] [2022-12-13 20:03:15,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:03:15,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:03:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:03:15,267 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 20:03:15,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:03:15,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935883225] [2022-12-13 20:03:15,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935883225] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:03:15,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18198083] [2022-12-13 20:03:15,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 20:03:15,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:03:15,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:03:15,268 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:03:15,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 20:03:15,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:03:15,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-13 20:03:15,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:03:15,382 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 20:03:15,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:03:15,538 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 20:03:15,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18198083] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:03:15,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:03:15,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-12-13 20:03:15,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048626379] [2022-12-13 20:03:15,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:03:15,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 20:03:15,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:03:15,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 20:03:15,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-12-13 20:03:15,540 INFO L87 Difference]: Start difference. First operand 70 states and 95 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:16,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:03:16,006 INFO L93 Difference]: Finished difference Result 119 states and 158 transitions. [2022-12-13 20:03:16,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 20:03:16,006 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-12-13 20:03:16,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:03:16,007 INFO L225 Difference]: With dead ends: 119 [2022-12-13 20:03:16,007 INFO L226 Difference]: Without dead ends: 101 [2022-12-13 20:03:16,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2022-12-13 20:03:16,007 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 30 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:03:16,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 79 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:03:16,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-12-13 20:03:16,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 77. [2022-12-13 20:03:16,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.381578947368421) internal successors, (105), 76 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:16,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 105 transitions. [2022-12-13 20:03:16,029 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 105 transitions. Word has length 20 [2022-12-13 20:03:16,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:03:16,029 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 105 transitions. [2022-12-13 20:03:16,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:16,029 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 105 transitions. [2022-12-13 20:03:16,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 20:03:16,029 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:03:16,029 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:03:16,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 20:03:16,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 20:03:16,231 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:03:16,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:03:16,232 INFO L85 PathProgramCache]: Analyzing trace with hash -2017092107, now seen corresponding path program 8 times [2022-12-13 20:03:16,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:03:16,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158532607] [2022-12-13 20:03:16,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:03:16,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:03:16,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:03:16,730 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:16,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:03:16,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158532607] [2022-12-13 20:03:16,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158532607] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:03:16,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309338730] [2022-12-13 20:03:16,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:03:16,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:03:16,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:03:16,732 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:03:16,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 20:03:16,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:03:16,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:03:16,811 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-13 20:03:16,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:03:17,218 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:17,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:03:17,705 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:17,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309338730] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:03:17,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:03:17,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 14] total 41 [2022-12-13 20:03:17,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064370934] [2022-12-13 20:03:17,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:03:17,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-13 20:03:17,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:03:17,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-13 20:03:17,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 20:03:17,707 INFO L87 Difference]: Start difference. First operand 77 states and 105 transitions. Second operand has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 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) [2022-12-13 20:03:21,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:03:21,121 INFO L93 Difference]: Finished difference Result 143 states and 178 transitions. [2022-12-13 20:03:21,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-12-13 20:03:21,122 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 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 21 [2022-12-13 20:03:21,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:03:21,123 INFO L225 Difference]: With dead ends: 143 [2022-12-13 20:03:21,123 INFO L226 Difference]: Without dead ends: 109 [2022-12-13 20:03:21,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=483, Invalid=3677, Unknown=0, NotChecked=0, Total=4160 [2022-12-13 20:03:21,124 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 80 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:03:21,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 161 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-13 20:03:21,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-12-13 20:03:21,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2022-12-13 20:03:21,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.4) internal successors, (98), 70 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:21,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 98 transitions. [2022-12-13 20:03:21,147 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 98 transitions. Word has length 21 [2022-12-13 20:03:21,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:03:21,147 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 98 transitions. [2022-12-13 20:03:21,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 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) [2022-12-13 20:03:21,147 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 98 transitions. [2022-12-13 20:03:21,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 20:03:21,148 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:03:21,148 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:03:21,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 20:03:21,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 20:03:21,349 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:03:21,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:03:21,350 INFO L85 PathProgramCache]: Analyzing trace with hash 2027051824, now seen corresponding path program 9 times [2022-12-13 20:03:21,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:03:21,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434718939] [2022-12-13 20:03:21,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:03:21,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:03:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:03:21,520 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 20:03:21,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:03:21,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434718939] [2022-12-13 20:03:21,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434718939] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:03:21,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876392926] [2022-12-13 20:03:21,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:03:21,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:03:21,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:03:21,521 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:03:21,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 20:03:21,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 20:03:21,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:03:21,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 20:03:21,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:03:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 20:03:21,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:03:21,793 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-12-13 20:03:21,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876392926] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:03:21,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:03:21,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 8] total 27 [2022-12-13 20:03:21,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912413670] [2022-12-13 20:03:21,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:03:21,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-13 20:03:21,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:03:21,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-13 20:03:21,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-12-13 20:03:21,795 INFO L87 Difference]: Start difference. First operand 71 states and 98 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:22,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:03:22,776 INFO L93 Difference]: Finished difference Result 143 states and 194 transitions. [2022-12-13 20:03:22,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-12-13 20:03:22,777 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 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 22 [2022-12-13 20:03:22,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:03:22,777 INFO L225 Difference]: With dead ends: 143 [2022-12-13 20:03:22,777 INFO L226 Difference]: Without dead ends: 126 [2022-12-13 20:03:22,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=527, Invalid=2665, Unknown=0, NotChecked=0, Total=3192 [2022-12-13 20:03:22,778 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 133 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 20:03:22,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 167 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 856 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 20:03:22,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-12-13 20:03:22,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2022-12-13 20:03:22,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2911392405063291) internal successors, (102), 79 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:22,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2022-12-13 20:03:22,813 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 22 [2022-12-13 20:03:22,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:03:22,813 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2022-12-13 20:03:22,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:22,813 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2022-12-13 20:03:22,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 20:03:22,814 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:03:22,814 INFO L195 NwaCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:03:22,818 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 20:03:23,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:03:23,015 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:03:23,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:03:23,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1622674000, now seen corresponding path program 3 times [2022-12-13 20:03:23,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:03:23,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510587086] [2022-12-13 20:03:23,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:03:23,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:03:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:03:23,221 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:23,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:03:23,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510587086] [2022-12-13 20:03:23,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510587086] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:03:23,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633578877] [2022-12-13 20:03:23,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:03:23,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:03:23,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:03:23,222 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:03:23,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 20:03:23,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-12-13 20:03:23,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:03:23,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-13 20:03:23,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:03:23,395 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:23,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:03:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:03:23,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633578877] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:03:23,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:03:23,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-12-13 20:03:23,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292379184] [2022-12-13 20:03:23,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:03:23,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 20:03:23,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:03:23,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 20:03:23,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 20:03:23,680 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:03:48,941 WARN L233 SmtUtils]: Spent 7.57s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:04:36,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:04:36,851 INFO L93 Difference]: Finished difference Result 398 states and 540 transitions. [2022-12-13 20:04:36,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-12-13 20:04:36,852 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 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 22 [2022-12-13 20:04:36,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:04:36,854 INFO L225 Difference]: With dead ends: 398 [2022-12-13 20:04:36,854 INFO L226 Difference]: Without dead ends: 371 [2022-12-13 20:04:36,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1629 ImplicationChecksByTransitivity, 71.9s TimeCoverageRelationStatistics Valid=2044, Invalid=4598, Unknown=0, NotChecked=0, Total=6642 [2022-12-13 20:04:36,856 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 954 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 954 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-13 20:04:36,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [954 Valid, 355 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-13 20:04:36,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-12-13 20:04:36,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 119. [2022-12-13 20:04:36,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.3389830508474576) internal successors, (158), 118 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:36,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 158 transitions. [2022-12-13 20:04:36,910 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 158 transitions. Word has length 22 [2022-12-13 20:04:36,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:04:36,911 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 158 transitions. [2022-12-13 20:04:36,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:36,911 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 158 transitions. [2022-12-13 20:04:36,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 20:04:36,911 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:04:36,911 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:04:36,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 20:04:37,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 20:04:37,112 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:04:37,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:04:37,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1230457407, now seen corresponding path program 10 times [2022-12-13 20:04:37,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:04:37,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988368489] [2022-12-13 20:04:37,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:04:37,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:04:37,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:04:37,695 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:04:37,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:04:37,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988368489] [2022-12-13 20:04:37,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988368489] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:04:37,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883950608] [2022-12-13 20:04:37,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 20:04:37,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:04:37,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:04:37,696 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:04:37,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 20:04:37,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 20:04:37,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:04:37,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-13 20:04:37,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:04:38,322 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:04:38,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:04:39,263 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:04:39,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883950608] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:04:39,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:04:39,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 43 [2022-12-13 20:04:39,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399854571] [2022-12-13 20:04:39,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:04:39,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 20:04:39,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:04:39,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 20:04:39,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 20:04:39,264 INFO L87 Difference]: Start difference. First operand 119 states and 158 transitions. Second operand has 43 states, 43 states have (on average 1.5116279069767442) internal successors, (65), 43 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:47,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:04:47,261 INFO L93 Difference]: Finished difference Result 215 states and 263 transitions. [2022-12-13 20:04:47,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-13 20:04:47,262 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.5116279069767442) internal successors, (65), 43 states have internal predecessors, (65), 0 states have call successors, (0), 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 24 [2022-12-13 20:04:47,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:04:47,263 INFO L225 Difference]: With dead ends: 215 [2022-12-13 20:04:47,263 INFO L226 Difference]: Without dead ends: 189 [2022-12-13 20:04:47,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=552, Invalid=4704, Unknown=0, NotChecked=0, Total=5256 [2022-12-13 20:04:47,264 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 99 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:04:47,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 144 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-13 20:04:47,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-12-13 20:04:47,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 112. [2022-12-13 20:04:47,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.3423423423423424) internal successors, (149), 111 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:47,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 149 transitions. [2022-12-13 20:04:47,319 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 149 transitions. Word has length 24 [2022-12-13 20:04:47,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:04:47,320 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 149 transitions. [2022-12-13 20:04:47,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.5116279069767442) internal successors, (65), 43 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:04:47,320 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 149 transitions. [2022-12-13 20:04:47,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 20:04:47,320 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:04:47,320 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:04:47,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 20:04:47,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:04:47,521 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:04:47,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:04:47,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1431729572, now seen corresponding path program 11 times [2022-12-13 20:04:47,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:04:47,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762774587] [2022-12-13 20:04:47,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:04:47,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:04:47,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:04:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:04:47,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:04:47,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762774587] [2022-12-13 20:04:47,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762774587] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:04:47,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307761086] [2022-12-13 20:04:47,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 20:04:47,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:04:47,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:04:47,756 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:04:47,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 20:04:48,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-12-13 20:04:48,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:04:48,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 20:04:48,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:04:48,241 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:04:48,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:04:48,641 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:04:48,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307761086] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:04:48,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:04:48,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2022-12-13 20:04:48,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613121356] [2022-12-13 20:04:48,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:04:48,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-13 20:04:48,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:04:48,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-13 20:04:48,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 20:04:48,643 INFO L87 Difference]: Start difference. First operand 112 states and 149 transitions. Second operand has 37 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:05:27,420 WARN L233 SmtUtils]: Spent 12.45s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:05:44,791 WARN L233 SmtUtils]: Spent 7.68s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:05:56,451 WARN L233 SmtUtils]: Spent 6.55s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:06:11,266 WARN L233 SmtUtils]: Spent 5.72s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:06:22,471 WARN L233 SmtUtils]: Spent 5.86s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:06:38,249 WARN L233 SmtUtils]: Spent 5.32s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:07:15,822 WARN L233 SmtUtils]: Spent 7.17s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:08:54,467 WARN L233 SmtUtils]: Spent 5.89s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:08:54,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:08:54,955 INFO L93 Difference]: Finished difference Result 386 states and 513 transitions. [2022-12-13 20:08:54,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-12-13 20:08:54,955 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 0 states have call successors, (0), 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 25 [2022-12-13 20:08:54,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:08:54,956 INFO L225 Difference]: With dead ends: 386 [2022-12-13 20:08:54,956 INFO L226 Difference]: Without dead ends: 374 [2022-12-13 20:08:54,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8602 ImplicationChecksByTransitivity, 242.9s TimeCoverageRelationStatistics Valid=6298, Invalid=16652, Unknown=2, NotChecked=0, Total=22952 [2022-12-13 20:08:54,959 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1633 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 766 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1633 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 766 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-12-13 20:08:54,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1633 Valid, 396 Invalid, 1770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [766 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-12-13 20:08:54,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-12-13 20:08:55,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 124. [2022-12-13 20:08:55,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.3414634146341464) internal successors, (165), 123 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:08:55,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 165 transitions. [2022-12-13 20:08:55,028 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 165 transitions. Word has length 25 [2022-12-13 20:08:55,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:08:55,028 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 165 transitions. [2022-12-13 20:08:55,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:08:55,028 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 165 transitions. [2022-12-13 20:08:55,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 20:08:55,028 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:08:55,028 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:08:55,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 20:08:55,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 20:08:55,229 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:08:55,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:08:55,229 INFO L85 PathProgramCache]: Analyzing trace with hash -40778609, now seen corresponding path program 12 times [2022-12-13 20:08:55,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:08:55,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314121171] [2022-12-13 20:08:55,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:08:55,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:08:55,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:08:55,369 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 20:08:55,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:08:55,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314121171] [2022-12-13 20:08:55,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314121171] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:08:55,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624783064] [2022-12-13 20:08:55,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 20:08:55,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:08:55,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:08:55,370 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:08:55,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 20:08:55,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 20:08:55,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:08:55,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-13 20:08:55,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:08:55,530 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 20:08:55,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:08:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-13 20:08:55,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624783064] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:08:55,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:08:55,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 33 [2022-12-13 20:08:55,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343608896] [2022-12-13 20:08:55,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:08:55,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-13 20:08:55,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:08:55,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-13 20:08:55,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2022-12-13 20:08:55,815 INFO L87 Difference]: Start difference. First operand 124 states and 165 transitions. Second operand has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:08:57,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:08:57,545 INFO L93 Difference]: Finished difference Result 241 states and 307 transitions. [2022-12-13 20:08:57,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-13 20:08:57,545 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 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 26 [2022-12-13 20:08:57,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:08:57,545 INFO L225 Difference]: With dead ends: 241 [2022-12-13 20:08:57,546 INFO L226 Difference]: Without dead ends: 179 [2022-12-13 20:08:57,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=251, Invalid=1389, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 20:08:57,546 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 43 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 20:08:57,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 107 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 20:08:57,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-12-13 20:08:57,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 148. [2022-12-13 20:08:57,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.3537414965986394) internal successors, (199), 147 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:08:57,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 199 transitions. [2022-12-13 20:08:57,630 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 199 transitions. Word has length 26 [2022-12-13 20:08:57,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:08:57,630 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 199 transitions. [2022-12-13 20:08:57,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:08:57,630 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 199 transitions. [2022-12-13 20:08:57,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 20:08:57,630 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:08:57,630 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:08:57,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 20:08:57,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 20:08:57,831 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:08:57,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:08:57,832 INFO L85 PathProgramCache]: Analyzing trace with hash 881225141, now seen corresponding path program 13 times [2022-12-13 20:08:57,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:08:57,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707889587] [2022-12-13 20:08:57,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:08:57,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:08:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:08:58,601 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:08:58,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:08:58,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707889587] [2022-12-13 20:08:58,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707889587] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:08:58,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218800933] [2022-12-13 20:08:58,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 20:08:58,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:08:58,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:08:58,602 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:08:58,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 20:08:58,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:08:58,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 63 conjunts are in the unsatisfiable core [2022-12-13 20:08:58,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:09:01,064 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:09:01,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:09:02,884 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:09:02,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218800933] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:09:02,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:09:02,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 19] total 49 [2022-12-13 20:09:02,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498524779] [2022-12-13 20:09:02,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:09:02,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-13 20:09:02,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:09:02,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-13 20:09:02,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=2126, Unknown=0, NotChecked=0, Total=2352 [2022-12-13 20:09:02,886 INFO L87 Difference]: Start difference. First operand 148 states and 199 transitions. Second operand has 49 states, 49 states have (on average 1.510204081632653) internal successors, (74), 49 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:09:27,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:09:27,605 INFO L93 Difference]: Finished difference Result 264 states and 320 transitions. [2022-12-13 20:09:27,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-12-13 20:09:27,605 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.510204081632653) internal successors, (74), 49 states have internal predecessors, (74), 0 states have call successors, (0), 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 27 [2022-12-13 20:09:27,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:09:27,606 INFO L225 Difference]: With dead ends: 264 [2022-12-13 20:09:27,606 INFO L226 Difference]: Without dead ends: 230 [2022-12-13 20:09:27,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=663, Invalid=5979, Unknown=0, NotChecked=0, Total=6642 [2022-12-13 20:09:27,607 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 126 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-12-13 20:09:27,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 116 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-12-13 20:09:27,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-12-13 20:09:27,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 134. [2022-12-13 20:09:27,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.368421052631579) internal successors, (182), 133 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:09:27,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 182 transitions. [2022-12-13 20:09:27,689 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 182 transitions. Word has length 27 [2022-12-13 20:09:27,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:09:27,689 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 182 transitions. [2022-12-13 20:09:27,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.510204081632653) internal successors, (74), 49 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:09:27,689 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 182 transitions. [2022-12-13 20:09:27,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 20:09:27,690 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:09:27,690 INFO L195 NwaCegarLoop]: trace histogram [15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:09:27,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 20:09:27,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 20:09:27,891 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:09:27,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:09:27,891 INFO L85 PathProgramCache]: Analyzing trace with hash 949161264, now seen corresponding path program 14 times [2022-12-13 20:09:27,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:09:27,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711077616] [2022-12-13 20:09:27,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:09:27,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:09:27,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:09:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 20:09:28,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:09:28,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711077616] [2022-12-13 20:09:28,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711077616] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:09:28,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596640862] [2022-12-13 20:09:28,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:09:28,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:09:28,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:09:28,116 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:09:28,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_82de57fe-e741-4d8c-9a49-73f9f40faaf7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 20:09:28,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:09:28,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:09:28,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-13 20:09:28,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:09:28,213 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 20:09:28,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:09:28,760 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 20:09:28,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596640862] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:09:28,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:09:28,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2022-12-13 20:09:28,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037531543] [2022-12-13 20:09:28,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:09:28,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-12-13 20:09:28,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:09:28,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-12-13 20:09:28,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=1293, Unknown=0, NotChecked=0, Total=1640 [2022-12-13 20:09:28,762 INFO L87 Difference]: Start difference. First operand 134 states and 182 transitions. Second operand has 41 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:09:51,650 WARN L233 SmtUtils]: Spent 11.14s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:10:10,015 WARN L233 SmtUtils]: Spent 6.14s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:10:31,185 WARN L233 SmtUtils]: Spent 16.89s on a formula simplification that was a NOOP. DAG size: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:10:43,455 WARN L233 SmtUtils]: Spent 5.70s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:11:11,267 WARN L233 SmtUtils]: Spent 18.81s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:11:13,361 WARN L837 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967295) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296)) (< 0 (mod (+ 4294967294 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4294967294) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296)) (< 0 (mod (+ 4294967295 |c_ULTIMATE.start_main_~z~0#1|) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296))) is different from false [2022-12-13 20:11:43,547 WARN L233 SmtUtils]: Spent 11.94s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:11:57,397 WARN L233 SmtUtils]: Spent 8.83s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:12:19,585 WARN L233 SmtUtils]: Spent 9.04s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:12:30,675 WARN L233 SmtUtils]: Spent 8.57s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:13:06,907 WARN L233 SmtUtils]: Spent 13.22s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:13:18,934 WARN L233 SmtUtils]: Spent 6.54s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:13:43,108 WARN L233 SmtUtils]: Spent 9.31s on a formula simplification that was a NOOP. DAG size: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:14:02,000 WARN L233 SmtUtils]: Spent 8.13s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:14:54,354 WARN L233 SmtUtils]: Spent 9.75s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:15:30,340 WARN L233 SmtUtils]: Spent 5.30s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 20:16:12,065 WARN L233 SmtUtils]: Spent 7.02s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)