./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/loopv3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/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_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/loopv3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/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_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/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 dde080b2b1290163775d8fea1546e1b21e5d1f7776ff175b316d8ca2be5d0863 --- 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 15:47:14,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 15:47:14,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 15:47:14,828 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 15:47:14,828 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 15:47:14,829 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 15:47:14,830 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 15:47:14,832 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 15:47:14,833 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 15:47:14,834 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 15:47:14,835 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 15:47:14,836 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 15:47:14,836 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 15:47:14,847 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 15:47:14,848 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 15:47:14,849 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 15:47:14,850 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 15:47:14,851 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 15:47:14,852 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 15:47:14,854 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 15:47:14,855 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 15:47:14,856 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 15:47:14,857 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 15:47:14,858 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 15:47:14,861 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 15:47:14,861 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 15:47:14,862 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 15:47:14,863 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 15:47:14,863 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 15:47:14,864 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 15:47:14,864 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 15:47:14,865 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 15:47:14,865 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 15:47:14,866 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 15:47:14,867 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 15:47:14,867 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 15:47:14,868 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 15:47:14,868 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 15:47:14,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 15:47:14,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 15:47:14,869 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 15:47:14,870 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 15:47:14,889 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 15:47:14,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 15:47:14,889 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 15:47:14,889 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 15:47:14,890 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 15:47:14,890 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 15:47:14,891 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 15:47:14,891 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 15:47:14,891 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 15:47:14,891 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 15:47:14,891 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 15:47:14,891 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 15:47:14,892 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 15:47:14,892 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 15:47:14,892 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 15:47:14,892 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 15:47:14,892 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 15:47:14,892 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 15:47:14,893 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 15:47:14,893 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 15:47:14,893 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 15:47:14,893 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 15:47:14,893 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 15:47:14,893 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 15:47:14,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:47:14,894 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 15:47:14,894 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 15:47:14,894 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 15:47:14,894 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 15:47:14,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 15:47:14,895 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 15:47:14,895 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 15:47:14,895 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 15:47:14,895 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 15:47:14,895 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 15:47:14,895 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_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dde080b2b1290163775d8fea1546e1b21e5d1f7776ff175b316d8ca2be5d0863 [2022-12-13 15:47:15,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 15:47:15,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 15:47:15,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 15:47:15,108 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 15:47:15,108 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 15:47:15,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/loops-crafted-1/loopv3.c [2022-12-13 15:47:17,711 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 15:47:17,854 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 15:47:17,854 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/sv-benchmarks/c/loops-crafted-1/loopv3.c [2022-12-13 15:47:17,858 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/data/f1e90efdb/07819d7ee73c441da0438d3031cc310b/FLAG0ef3679b8 [2022-12-13 15:47:18,274 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/data/f1e90efdb/07819d7ee73c441da0438d3031cc310b [2022-12-13 15:47:18,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 15:47:18,277 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 15:47:18,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 15:47:18,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 15:47:18,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 15:47:18,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:47:18" (1/1) ... [2022-12-13 15:47:18,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fd96e07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:47:18, skipping insertion in model container [2022-12-13 15:47:18,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 03:47:18" (1/1) ... [2022-12-13 15:47:18,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 15:47:18,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 15:47:18,397 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_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/sv-benchmarks/c/loops-crafted-1/loopv3.c[456,469] [2022-12-13 15:47:18,404 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:47:18,411 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 15:47:18,420 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_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/sv-benchmarks/c/loops-crafted-1/loopv3.c[456,469] [2022-12-13 15:47:18,421 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 15:47:18,431 INFO L208 MainTranslator]: Completed translation [2022-12-13 15:47:18,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:47:18 WrapperNode [2022-12-13 15:47:18,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 15:47:18,432 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 15:47:18,433 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 15:47:18,433 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 15:47:18,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:47:18" (1/1) ... [2022-12-13 15:47:18,443 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:47:18" (1/1) ... [2022-12-13 15:47:18,454 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 35 [2022-12-13 15:47:18,455 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 15:47:18,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 15:47:18,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 15:47:18,455 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 15:47:18,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:47:18" (1/1) ... [2022-12-13 15:47:18,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:47:18" (1/1) ... [2022-12-13 15:47:18,462 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:47:18" (1/1) ... [2022-12-13 15:47:18,462 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:47:18" (1/1) ... [2022-12-13 15:47:18,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:47:18" (1/1) ... [2022-12-13 15:47:18,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:47:18" (1/1) ... [2022-12-13 15:47:18,467 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:47:18" (1/1) ... [2022-12-13 15:47:18,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:47:18" (1/1) ... [2022-12-13 15:47:18,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 15:47:18,469 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 15:47:18,469 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 15:47:18,469 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 15:47:18,470 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:47:18" (1/1) ... [2022-12-13 15:47:18,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 15:47:18,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:47:18,492 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 15:47:18,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 15:47:18,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 15:47:18,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 15:47:18,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 15:47:18,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 15:47:18,577 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 15:47:18,578 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 15:47:18,669 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 15:47:18,673 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 15:47:18,674 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 15:47:18,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:47:18 BoogieIcfgContainer [2022-12-13 15:47:18,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 15:47:18,677 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 15:47:18,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 15:47:18,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 15:47:18,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 03:47:18" (1/3) ... [2022-12-13 15:47:18,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4736dfa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:47:18, skipping insertion in model container [2022-12-13 15:47:18,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 03:47:18" (2/3) ... [2022-12-13 15:47:18,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4736dfa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 03:47:18, skipping insertion in model container [2022-12-13 15:47:18,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:47:18" (3/3) ... [2022-12-13 15:47:18,683 INFO L112 eAbstractionObserver]: Analyzing ICFG loopv3.c [2022-12-13 15:47:18,703 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 15:47:18,704 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 15:47:18,756 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 15:47:18,762 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;@49af9c29, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 15:47:18,763 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 15:47:18,767 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 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 15:47:18,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 15:47:18,773 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:47:18,773 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 15:47:18,774 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:47:18,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:18,779 INFO L85 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2022-12-13 15:47:18,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:47:18,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159692077] [2022-12-13 15:47:18,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:18,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:47:18,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:18,918 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 15:47:18,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:47:18,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159692077] [2022-12-13 15:47:18,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159692077] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:47:18,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:47:18,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 15:47:18,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018828013] [2022-12-13 15:47:18,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:47:18,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 15:47:18,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:47:18,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 15:47:18,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 15:47:18,948 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 15:47:18,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:47:18,958 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-12-13 15:47:18,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 15:47:18,960 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-12-13 15:47:18,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:47:18,966 INFO L225 Difference]: With dead ends: 20 [2022-12-13 15:47:18,966 INFO L226 Difference]: Without dead ends: 8 [2022-12-13 15:47:18,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 15:47:18,973 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:47:18,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:47:18,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-12-13 15:47:18,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-12-13 15:47:18,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 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 15:47:18,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-12-13 15:47:19,000 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2022-12-13 15:47:19,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:47:19,000 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-12-13 15:47:19,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 15:47:19,001 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-12-13 15:47:19,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 15:47:19,001 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:47:19,001 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 15:47:19,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 15:47:19,002 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:47:19,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:19,003 INFO L85 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2022-12-13 15:47:19,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:47:19,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560454229] [2022-12-13 15:47:19,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:19,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:47:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:19,101 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 15:47:19,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:47:19,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560454229] [2022-12-13 15:47:19,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560454229] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 15:47:19,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 15:47:19,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 15:47:19,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651664409] [2022-12-13 15:47:19,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:47:19,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:47:19,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:47:19,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:47:19,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:47:19,105 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 15:47:19,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:47:19,127 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2022-12-13 15:47:19,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:47:19,128 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-12-13 15:47:19,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:47:19,129 INFO L225 Difference]: With dead ends: 14 [2022-12-13 15:47:19,130 INFO L226 Difference]: Without dead ends: 10 [2022-12-13 15:47:19,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 15:47:19,132 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:47:19,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 7 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:47:19,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-12-13 15:47:19,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2022-12-13 15:47:19,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 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 15:47:19,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2022-12-13 15:47:19,137 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2022-12-13 15:47:19,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:47:19,137 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2022-12-13 15:47:19,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 15:47:19,138 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2022-12-13 15:47:19,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-13 15:47:19,138 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:47:19,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 15:47:19,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 15:47:19,139 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:47:19,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:19,140 INFO L85 PathProgramCache]: Analyzing trace with hash 297538966, now seen corresponding path program 1 times [2022-12-13 15:47:19,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:47:19,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152648970] [2022-12-13 15:47:19,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:19,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:47:19,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:19,229 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 15:47:19,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:47:19,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152648970] [2022-12-13 15:47:19,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152648970] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:47:19,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611599423] [2022-12-13 15:47:19,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:19,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:47:19,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:47:19,232 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:47:19,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 15:47:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:19,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 15:47:19,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:47:19,336 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 15:47:19,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:47:19,368 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 15:47:19,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611599423] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:47:19,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:47:19,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-12-13 15:47:19,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93262097] [2022-12-13 15:47:19,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:47:19,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-13 15:47:19,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:47:19,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-13 15:47:19,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-12-13 15:47:19,371 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 10 states, 10 states have (on average 1.7) 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 15:47:19,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:47:19,422 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2022-12-13 15:47:19,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 15:47:19,422 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) 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 8 [2022-12-13 15:47:19,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:47:19,423 INFO L225 Difference]: With dead ends: 19 [2022-12-13 15:47:19,423 INFO L226 Difference]: Without dead ends: 15 [2022-12-13 15:47:19,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-12-13 15:47:19,425 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:47:19,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 9 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:47:19,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-13 15:47:19,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-12-13 15:47:19,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 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 15:47:19,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2022-12-13 15:47:19,430 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 8 [2022-12-13 15:47:19,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:47:19,431 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2022-12-13 15:47:19,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) 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 15:47:19,431 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2022-12-13 15:47:19,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-13 15:47:19,431 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:47:19,432 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 15:47:19,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 15:47:19,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:47:19,634 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:47:19,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:19,637 INFO L85 PathProgramCache]: Analyzing trace with hash 742440183, now seen corresponding path program 1 times [2022-12-13 15:47:19,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:47:19,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086016782] [2022-12-13 15:47:19,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:19,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:47:19,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:19,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:47:19,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:47:19,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086016782] [2022-12-13 15:47:19,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086016782] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:47:19,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972062328] [2022-12-13 15:47:19,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:19,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:47:19,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:47:19,754 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:47:19,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 15:47:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:19,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 15:47:19,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:47:19,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:47:19,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:47:19,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:47:19,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972062328] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:47:19,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:47:19,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-12-13 15:47:19,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130018697] [2022-12-13 15:47:19,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:47:19,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 15:47:19,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:47:19,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 15:47:19,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2022-12-13 15:47:19,870 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 15:47:19,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:47:19,936 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2022-12-13 15:47:19,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 15:47:19,936 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 10 [2022-12-13 15:47:19,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:47:19,937 INFO L225 Difference]: With dead ends: 29 [2022-12-13 15:47:19,937 INFO L226 Difference]: Without dead ends: 25 [2022-12-13 15:47:19,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2022-12-13 15:47:19,938 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 34 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:47:19,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 15 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:47:19,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-12-13 15:47:19,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2022-12-13 15:47:19,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 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 15:47:19,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2022-12-13 15:47:19,941 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 10 [2022-12-13 15:47:19,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:47:19,942 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2022-12-13 15:47:19,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 15:47:19,942 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2022-12-13 15:47:19,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-13 15:47:19,942 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:47:19,942 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2022-12-13 15:47:19,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 15:47:20,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:47:20,144 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:47:20,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:20,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1714863729, now seen corresponding path program 2 times [2022-12-13 15:47:20,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:47:20,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443318687] [2022-12-13 15:47:20,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:20,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:47:20,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:20,303 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:47:20,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:47:20,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443318687] [2022-12-13 15:47:20,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443318687] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:47:20,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469487797] [2022-12-13 15:47:20,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:47:20,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:47:20,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:47:20,304 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:47:20,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 15:47:20,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:47:20,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:47:20,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 15:47:20,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:47:20,449 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:47:20,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:47:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:47:20,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469487797] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:47:20,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:47:20,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-12-13 15:47:20,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728159763] [2022-12-13 15:47:20,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:47:20,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 15:47:20,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:47:20,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 15:47:20,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=341, Unknown=0, NotChecked=0, Total=600 [2022-12-13 15:47:20,551 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 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 15:47:20,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:47:20,703 INFO L93 Difference]: Finished difference Result 61 states and 91 transitions. [2022-12-13 15:47:20,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 15:47:20,703 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 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 15:47:20,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:47:20,704 INFO L225 Difference]: With dead ends: 61 [2022-12-13 15:47:20,704 INFO L226 Difference]: Without dead ends: 57 [2022-12-13 15:47:20,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=392, Invalid=600, Unknown=0, NotChecked=0, Total=992 [2022-12-13 15:47:20,705 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 38 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:47:20,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 13 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:47:20,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-12-13 15:47:20,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 35. [2022-12-13 15:47:20,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 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 15:47:20,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2022-12-13 15:47:20,713 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 18 [2022-12-13 15:47:20,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:47:20,713 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2022-12-13 15:47:20,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 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 15:47:20,714 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2022-12-13 15:47:20,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-13 15:47:20,714 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:47:20,714 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2022-12-13 15:47:20,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 15:47:20,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:47:20,915 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:47:20,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:20,916 INFO L85 PathProgramCache]: Analyzing trace with hash 355037325, now seen corresponding path program 1 times [2022-12-13 15:47:20,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:47:20,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853158929] [2022-12-13 15:47:20,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:20,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:47:20,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:21,137 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:47:21,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:47:21,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853158929] [2022-12-13 15:47:21,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853158929] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:47:21,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224701776] [2022-12-13 15:47:21,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:21,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:47:21,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:47:21,139 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:47:21,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 15:47:21,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:21,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 15:47:21,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:47:21,308 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:47:21,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:47:21,444 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:47:21,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224701776] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:47:21,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:47:21,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2022-12-13 15:47:21,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183877853] [2022-12-13 15:47:21,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:47:21,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-13 15:47:21,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:47:21,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-13 15:47:21,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=527, Unknown=0, NotChecked=0, Total=930 [2022-12-13 15:47:21,448 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:47:21,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:47:21,674 INFO L93 Difference]: Finished difference Result 119 states and 179 transitions. [2022-12-13 15:47:21,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 15:47:21,674 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-13 15:47:21,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:47:21,675 INFO L225 Difference]: With dead ends: 119 [2022-12-13 15:47:21,675 INFO L226 Difference]: Without dead ends: 115 [2022-12-13 15:47:21,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=610, Invalid=950, Unknown=0, NotChecked=0, Total=1560 [2022-12-13 15:47:21,677 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 37 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:47:21,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 15 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:47:21,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-12-13 15:47:21,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 43. [2022-12-13 15:47:21,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 0 states have call successors, (0), 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 15:47:21,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2022-12-13 15:47:21,689 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 22 [2022-12-13 15:47:21,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:47:21,689 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2022-12-13 15:47:21,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:47:21,690 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2022-12-13 15:47:21,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-13 15:47:21,690 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:47:21,690 INFO L195 NwaCegarLoop]: trace histogram [14, 10, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 15:47:21,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 15:47:21,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:47:21,892 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:47:21,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:21,892 INFO L85 PathProgramCache]: Analyzing trace with hash -294996049, now seen corresponding path program 2 times [2022-12-13 15:47:21,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:47:21,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609317559] [2022-12-13 15:47:21,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:21,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:47:21,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:22,190 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:47:22,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:47:22,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609317559] [2022-12-13 15:47:22,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609317559] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:47:22,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592038388] [2022-12-13 15:47:22,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 15:47:22,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:47:22,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:47:22,192 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:47:22,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 15:47:22,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 15:47:22,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:47:22,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 15:47:22,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:47:22,466 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:47:22,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:47:22,777 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:47:22,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592038388] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:47:22,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:47:22,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 48 [2022-12-13 15:47:22,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792071703] [2022-12-13 15:47:22,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:47:22,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-13 15:47:22,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:47:22,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-13 15:47:22,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=1325, Unknown=0, NotChecked=0, Total=2352 [2022-12-13 15:47:22,780 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand has 49 states, 49 states have (on average 1.9387755102040816) internal successors, (95), 48 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 15:47:23,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:47:23,173 INFO L93 Difference]: Finished difference Result 265 states and 401 transitions. [2022-12-13 15:47:23,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-13 15:47:23,173 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9387755102040816) internal successors, (95), 48 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) Word has length 34 [2022-12-13 15:47:23,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:47:23,175 INFO L225 Difference]: With dead ends: 265 [2022-12-13 15:47:23,175 INFO L226 Difference]: Without dead ends: 261 [2022-12-13 15:47:23,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1552, Invalid=2480, Unknown=0, NotChecked=0, Total=4032 [2022-12-13 15:47:23,176 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 109 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:47:23,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 11 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:47:23,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-12-13 15:47:23,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 67. [2022-12-13 15:47:23,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.4696969696969697) internal successors, (97), 66 states have internal predecessors, (97), 0 states have call successors, (0), 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 15:47:23,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 97 transitions. [2022-12-13 15:47:23,193 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 97 transitions. Word has length 34 [2022-12-13 15:47:23,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:47:23,193 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 97 transitions. [2022-12-13 15:47:23,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.9387755102040816) internal successors, (95), 48 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 15:47:23,194 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 97 transitions. [2022-12-13 15:47:23,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-13 15:47:23,194 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:47:23,195 INFO L195 NwaCegarLoop]: trace histogram [18, 12, 6, 1, 1, 1, 1, 1, 1] [2022-12-13 15:47:23,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 15:47:23,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 15:47:23,395 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:47:23,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:23,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1645760435, now seen corresponding path program 3 times [2022-12-13 15:47:23,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:47:23,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85004870] [2022-12-13 15:47:23,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:23,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:47:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:23,692 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:47:23,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:47:23,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85004870] [2022-12-13 15:47:23,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85004870] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:47:23,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562638852] [2022-12-13 15:47:23,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 15:47:23,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:47:23,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:47:23,693 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:47:23,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 15:47:23,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-12-13 15:47:23,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:47:23,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-13 15:47:23,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:47:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:47:24,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:47:24,370 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:47:24,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562638852] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 15:47:24,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 15:47:24,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 60 [2022-12-13 15:47:24,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661180939] [2022-12-13 15:47:24,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 15:47:24,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-12-13 15:47:24,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:47:24,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-12-13 15:47:24,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1603, Invalid=2057, Unknown=0, NotChecked=0, Total=3660 [2022-12-13 15:47:24,373 INFO L87 Difference]: Start difference. First operand 67 states and 97 transitions. Second operand has 61 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 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 15:47:24,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:47:24,891 INFO L93 Difference]: Finished difference Result 509 states and 769 transitions. [2022-12-13 15:47:24,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-13 15:47:24,892 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 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 42 [2022-12-13 15:47:24,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:47:24,894 INFO L225 Difference]: With dead ends: 509 [2022-12-13 15:47:24,894 INFO L226 Difference]: Without dead ends: 505 [2022-12-13 15:47:24,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2201 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2420, Invalid=3900, Unknown=0, NotChecked=0, Total=6320 [2022-12-13 15:47:24,897 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 135 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 15:47:24,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 13 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 15:47:24,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-12-13 15:47:24,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 83. [2022-12-13 15:47:24,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.475609756097561) internal successors, (121), 82 states have internal predecessors, (121), 0 states have call successors, (0), 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 15:47:24,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 121 transitions. [2022-12-13 15:47:24,936 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 121 transitions. Word has length 42 [2022-12-13 15:47:24,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:47:24,937 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 121 transitions. [2022-12-13 15:47:24,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 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 15:47:24,937 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 121 transitions. [2022-12-13 15:47:24,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-12-13 15:47:24,938 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 15:47:24,938 INFO L195 NwaCegarLoop]: trace histogram [30, 22, 8, 1, 1, 1, 1, 1, 1] [2022-12-13 15:47:24,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 15:47:25,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 15:47:25,140 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 15:47:25,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 15:47:25,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1585988105, now seen corresponding path program 4 times [2022-12-13 15:47:25,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 15:47:25,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884293460] [2022-12-13 15:47:25,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 15:47:25,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 15:47:25,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 15:47:25,780 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:47:25,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 15:47:25,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884293460] [2022-12-13 15:47:25,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884293460] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 15:47:25,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146463582] [2022-12-13 15:47:25,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 15:47:25,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:47:25,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 15:47:25,782 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 15:47:25,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 15:47:25,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 15:47:25,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 15:47:25,824 WARN L261 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 70 conjunts are in the unsatisfiable core [2022-12-13 15:47:25,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 15:47:26,490 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 15:47:26,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 15:47:26,716 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2022-12-13 15:47:26,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146463582] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-13 15:47:26,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-13 15:47:26,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [33, 34] total 68 [2022-12-13 15:47:26,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525222495] [2022-12-13 15:47:26,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 15:47:26,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 15:47:26,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 15:47:26,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 15:47:26,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=633, Invalid=3923, Unknown=0, NotChecked=0, Total=4556 [2022-12-13 15:47:26,720 INFO L87 Difference]: Start difference. First operand 83 states and 121 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 15:47:26,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 15:47:26,793 INFO L93 Difference]: Finished difference Result 83 states and 121 transitions. [2022-12-13 15:47:26,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 15:47:26,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 66 [2022-12-13 15:47:26,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 15:47:26,793 INFO L225 Difference]: With dead ends: 83 [2022-12-13 15:47:26,793 INFO L226 Difference]: Without dead ends: 0 [2022-12-13 15:47:26,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=637, Invalid=4055, Unknown=0, NotChecked=0, Total=4692 [2022-12-13 15:47:26,797 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 15:47:26,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 5 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 15:47:26,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-13 15:47:26,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-13 15:47:26,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 15:47:26,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-13 15:47:26,798 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 66 [2022-12-13 15:47:26,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 15:47:26,798 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-13 15:47:26,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 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 15:47:26,799 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-13 15:47:26,799 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-13 15:47:26,801 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-13 15:47:26,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 15:47:27,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 15:47:27,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-12-13 15:47:29,503 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-12-13 15:47:29,503 INFO L899 garLoopResultBuilder]: For program point L25(lines 25 28) no Hoare annotation was computed. [2022-12-13 15:47:29,503 INFO L895 garLoopResultBuilder]: At program point L25-2(lines 23 30) the Hoare annotation is: (and (= (* (div |ULTIMATE.start_main_~i~0#1| 4) 4) |ULTIMATE.start_main_~i~0#1|) (<= 50000001 ~SIZE~0)) [2022-12-13 15:47:29,503 INFO L899 garLoopResultBuilder]: For program point L23-2(lines 23 30) no Hoare annotation was computed. [2022-12-13 15:47:29,503 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 15) no Hoare annotation was computed. [2022-12-13 15:47:29,503 INFO L902 garLoopResultBuilder]: At program point L13-2(lines 12 17) the Hoare annotation is: true [2022-12-13 15:47:29,503 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2022-12-13 15:47:29,504 INFO L902 garLoopResultBuilder]: At program point main_returnLabel#1(lines 20 34) the Hoare annotation is: true [2022-12-13 15:47:29,504 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-12-13 15:47:29,504 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-12-13 15:47:29,504 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2022-12-13 15:47:29,504 INFO L899 garLoopResultBuilder]: For program point L14(line 14) no Hoare annotation was computed. [2022-12-13 15:47:29,506 INFO L445 BasicCegarLoop]: Path program histogram: [4, 2, 1, 1, 1] [2022-12-13 15:47:29,507 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 15:47:29,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 03:47:29 BoogieIcfgContainer [2022-12-13 15:47:29,516 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 15:47:29,516 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 15:47:29,516 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 15:47:29,516 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 15:47:29,517 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 03:47:18" (3/4) ... [2022-12-13 15:47:29,519 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-13 15:47:29,525 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2022-12-13 15:47:29,525 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2022-12-13 15:47:29,525 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-12-13 15:47:29,525 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-13 15:47:29,543 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/witness.graphml [2022-12-13 15:47:29,543 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 15:47:29,544 INFO L158 Benchmark]: Toolchain (without parser) took 11266.76ms. Allocated memory was 186.6MB in the beginning and 224.4MB in the end (delta: 37.7MB). Free memory was 155.4MB in the beginning and 69.4MB in the end (delta: 86.0MB). Peak memory consumption was 123.4MB. Max. memory is 16.1GB. [2022-12-13 15:47:29,544 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 117.4MB. Free memory was 91.6MB in the beginning and 91.5MB in the end (delta: 111.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 15:47:29,544 INFO L158 Benchmark]: CACSL2BoogieTranslator took 154.05ms. Allocated memory is still 186.6MB. Free memory was 155.4MB in the beginning and 145.3MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 15:47:29,544 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.19ms. Allocated memory is still 186.6MB. Free memory was 145.3MB in the beginning and 143.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 15:47:29,545 INFO L158 Benchmark]: Boogie Preprocessor took 13.31ms. Allocated memory is still 186.6MB. Free memory was 143.9MB in the beginning and 143.2MB in the end (delta: 691.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 15:47:29,545 INFO L158 Benchmark]: RCFGBuilder took 206.30ms. Allocated memory is still 186.6MB. Free memory was 143.2MB in the beginning and 155.9MB in the end (delta: -12.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 15:47:29,545 INFO L158 Benchmark]: TraceAbstraction took 10838.69ms. Allocated memory was 186.6MB in the beginning and 224.4MB in the end (delta: 37.7MB). Free memory was 155.4MB in the beginning and 71.5MB in the end (delta: 83.9MB). Peak memory consumption was 138.5MB. Max. memory is 16.1GB. [2022-12-13 15:47:29,545 INFO L158 Benchmark]: Witness Printer took 27.16ms. Allocated memory is still 224.4MB. Free memory was 71.5MB in the beginning and 69.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 15:47:29,547 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 117.4MB. Free memory was 91.6MB in the beginning and 91.5MB in the end (delta: 111.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 154.05ms. Allocated memory is still 186.6MB. Free memory was 155.4MB in the beginning and 145.3MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.19ms. Allocated memory is still 186.6MB. Free memory was 145.3MB in the beginning and 143.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 13.31ms. Allocated memory is still 186.6MB. Free memory was 143.9MB in the beginning and 143.2MB in the end (delta: 691.9kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 206.30ms. Allocated memory is still 186.6MB. Free memory was 143.2MB in the beginning and 155.9MB in the end (delta: -12.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 10838.69ms. Allocated memory was 186.6MB in the beginning and 224.4MB in the end (delta: 37.7MB). Free memory was 155.4MB in the beginning and 71.5MB in the end (delta: 83.9MB). Peak memory consumption was 138.5MB. Max. memory is 16.1GB. * Witness Printer took 27.16ms. Allocated memory is still 224.4MB. Free memory was 71.5MB in the beginning and 69.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10.8s, OverallIterations: 9, TraceHistogramMax: 30, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 383 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 383 mSDsluCounter, 101 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 51 mSDsCounter, 154 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 495 IncrementalHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 154 mSolverCounterUnsat, 50 mSDtfsCounter, 495 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 548 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5582 ImplicationChecksByTransitivity, 3.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=8, InterpolantAutomatonStates: 138, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 717 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 43 NumberOfFragments, 13 HoareAnnotationTreeSize, 3 FomulaSimplifications, 24375 FormulaSimplificationTreeSizeReduction, 1.9s HoareSimplificationTime, 3 FomulaSimplificationsInter, 17697 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 412 NumberOfCodeBlocks, 381 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 589 ConstructedInterpolants, 0 QuantifiedInterpolants, 2852 SizeOfPredicates, 15 NumberOfNonLiveVariables, 693 ConjunctsInSsa, 137 ConjunctsInUnsatCore, 23 InterpolantComputations, 3 PerfectInterpolantSequences, 900/4575 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: i / 4 * 4 == i && 50000001 <= SIZE - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-12-13 15:47:29,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7fbb340-4f1e-4e84-8d2e-ea632be4535e/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE