./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 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_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS --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 52a248b2b2cf395cf0c12ea6447af889ed3691d7fa3d2de2504a7728d19c705b --- 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-4e7fbc6 [2022-11-23 02:58:17,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 02:58:17,497 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 02:58:17,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 02:58:17,525 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 02:58:17,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 02:58:17,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 02:58:17,530 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 02:58:17,532 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 02:58:17,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 02:58:17,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 02:58:17,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 02:58:17,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 02:58:17,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 02:58:17,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 02:58:17,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 02:58:17,543 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 02:58:17,544 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 02:58:17,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 02:58:17,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 02:58:17,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 02:58:17,561 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 02:58:17,563 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 02:58:17,564 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 02:58:17,569 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 02:58:17,577 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 02:58:17,578 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 02:58:17,579 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 02:58:17,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 02:58:17,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 02:58:17,582 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 02:58:17,585 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 02:58:17,586 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 02:58:17,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 02:58:17,591 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 02:58:17,592 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 02:58:17,593 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 02:58:17,594 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 02:58:17,594 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 02:58:17,596 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 02:58:17,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 02:58:17,600 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 02:58:17,642 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 02:58:17,654 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 02:58:17,655 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 02:58:17,655 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 02:58:17,656 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 02:58:17,656 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 02:58:17,657 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 02:58:17,658 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 02:58:17,658 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 02:58:17,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 02:58:17,660 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 02:58:17,660 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 02:58:17,661 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 02:58:17,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 02:58:17,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 02:58:17,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 02:58:17,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 02:58:17,662 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 02:58:17,662 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 02:58:17,662 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 02:58:17,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 02:58:17,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 02:58:17,663 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 02:58:17,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 02:58:17,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:58:17,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 02:58:17,664 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 02:58:17,665 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 02:58:17,665 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 02:58:17,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 02:58:17,666 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 02:58:17,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 02:58:17,666 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 02:58:17,667 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 02:58:17,667 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_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52a248b2b2cf395cf0c12ea6447af889ed3691d7fa3d2de2504a7728d19c705b [2022-11-23 02:58:18,070 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 02:58:18,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 02:58:18,105 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 02:58:18,107 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 02:58:18,108 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 02:58:18,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2022-11-23 02:58:21,441 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 02:58:21,693 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 02:58:21,694 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2022-11-23 02:58:21,703 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/data/429b6eb0e/af7198a92e334b73b5f6056595eece80/FLAGf93140154 [2022-11-23 02:58:21,723 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/data/429b6eb0e/af7198a92e334b73b5f6056595eece80 [2022-11-23 02:58:21,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 02:58:21,728 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 02:58:21,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 02:58:21,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 02:58:21,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 02:58:21,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:58:21" (1/1) ... [2022-11-23 02:58:21,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4abb4ada and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:21, skipping insertion in model container [2022-11-23 02:58:21,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:58:21" (1/1) ... [2022-11-23 02:58:21,748 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 02:58:21,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 02:58:21,971 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_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2022-11-23 02:58:22,001 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:58:22,011 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 02:58:22,024 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_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c[414,427] [2022-11-23 02:58:22,041 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 02:58:22,057 INFO L208 MainTranslator]: Completed translation [2022-11-23 02:58:22,057 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:22 WrapperNode [2022-11-23 02:58:22,057 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 02:58:22,059 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 02:58:22,059 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 02:58:22,059 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 02:58:22,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:22" (1/1) ... [2022-11-23 02:58:22,078 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:22" (1/1) ... [2022-11-23 02:58:22,105 INFO L138 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 132 [2022-11-23 02:58:22,106 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 02:58:22,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 02:58:22,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 02:58:22,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 02:58:22,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:22" (1/1) ... [2022-11-23 02:58:22,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:22" (1/1) ... [2022-11-23 02:58:22,121 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:22" (1/1) ... [2022-11-23 02:58:22,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:22" (1/1) ... [2022-11-23 02:58:22,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:22" (1/1) ... [2022-11-23 02:58:22,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:22" (1/1) ... [2022-11-23 02:58:22,137 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:22" (1/1) ... [2022-11-23 02:58:22,138 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:22" (1/1) ... [2022-11-23 02:58:22,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 02:58:22,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 02:58:22,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 02:58:22,143 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 02:58:22,144 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:22" (1/1) ... [2022-11-23 02:58:22,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 02:58:22,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:58:22,185 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 02:58:22,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 02:58:22,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 02:58:22,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 02:58:22,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 02:58:22,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 02:58:22,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 02:58:22,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 02:58:22,256 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 02:58:22,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 02:58:22,357 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 02:58:22,360 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 02:58:22,685 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 02:58:22,692 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 02:58:22,692 INFO L300 CfgBuilder]: Removed 12 assume(true) statements. [2022-11-23 02:58:22,694 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:58:22 BoogieIcfgContainer [2022-11-23 02:58:22,695 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 02:58:22,697 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 02:58:22,698 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 02:58:22,702 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 02:58:22,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:58:21" (1/3) ... [2022-11-23 02:58:22,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@351839cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:58:22, skipping insertion in model container [2022-11-23 02:58:22,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:58:22" (2/3) ... [2022-11-23 02:58:22,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@351839cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:58:22, skipping insertion in model container [2022-11-23 02:58:22,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:58:22" (3/3) ... [2022-11-23 02:58:22,706 INFO L112 eAbstractionObserver]: Analyzing ICFG copy-partial-3-u.c [2022-11-23 02:58:22,729 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 02:58:22,730 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 02:58:22,791 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 02:58:22,800 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;@62e56623, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 02:58:22,800 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 02:58:22,805 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 34 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:22,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 02:58:22,815 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:58:22,815 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:58:22,816 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:58:22,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:58:22,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1247519481, now seen corresponding path program 1 times [2022-11-23 02:58:22,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:58:22,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860683458] [2022-11-23 02:58:22,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:58:22,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:58:22,981 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:58:22,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1881480876] [2022-11-23 02:58:22,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:58:22,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:22,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:58:22,987 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:58:23,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 02:58:23,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:58:23,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-23 02:58:23,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:58:23,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:58:23,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:58:23,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:58:23,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860683458] [2022-11-23 02:58:23,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:58:23,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881480876] [2022-11-23 02:58:23,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881480876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:58:23,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:58:23,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 02:58:23,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315761830] [2022-11-23 02:58:23,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:58:23,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 02:58:23,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:58:23,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 02:58:23,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 02:58:23,239 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 34 states have internal predecessors, (60), 0 states have call successors, (0), 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 7.5) internal successors, (15), 2 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) [2022-11-23 02:58:23,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:58:23,279 INFO L93 Difference]: Finished difference Result 67 states and 116 transitions. [2022-11-23 02:58:23,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 02:58:23,282 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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) Word has length 15 [2022-11-23 02:58:23,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:58:23,294 INFO L225 Difference]: With dead ends: 67 [2022-11-23 02:58:23,294 INFO L226 Difference]: Without dead ends: 31 [2022-11-23 02:58:23,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 02:58:23,310 INFO L413 NwaCegarLoop]: 46 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, 46 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 [2022-11-23 02:58:23,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 02:58:23,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-23 02:58:23,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-23 02:58:23,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:23,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2022-11-23 02:58:23,379 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 15 [2022-11-23 02:58:23,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:58:23,380 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2022-11-23 02:58:23,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 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) [2022-11-23 02:58:23,381 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2022-11-23 02:58:23,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-23 02:58:23,383 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:58:23,384 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:58:23,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 02:58:23,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-23 02:58:23,590 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:58:23,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:58:23,591 INFO L85 PathProgramCache]: Analyzing trace with hash -5605811, now seen corresponding path program 1 times [2022-11-23 02:58:23,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:58:23,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286706737] [2022-11-23 02:58:23,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:58:23,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:58:23,628 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:58:23,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564033067] [2022-11-23 02:58:23,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:58:23,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:23,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:58:23,635 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:58:23,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 02:58:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:58:23,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 02:58:23,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:58:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:58:23,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:58:23,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:58:23,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286706737] [2022-11-23 02:58:23,891 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:58:23,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564033067] [2022-11-23 02:58:23,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564033067] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:58:23,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:58:23,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 02:58:23,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839980064] [2022-11-23 02:58:23,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:58:23,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:58:23,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:58:23,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:58:23,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:58:23,907 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2022-11-23 02:58:24,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:58:24,057 INFO L93 Difference]: Finished difference Result 73 states and 100 transitions. [2022-11-23 02:58:24,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:58:24,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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) Word has length 15 [2022-11-23 02:58:24,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:58:24,059 INFO L225 Difference]: With dead ends: 73 [2022-11-23 02:58:24,059 INFO L226 Difference]: Without dead ends: 51 [2022-11-23 02:58:24,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:58:24,061 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 64 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 02:58:24,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 33 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 02:58:24,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-23 02:58:24,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2022-11-23 02:58:24,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:24,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2022-11-23 02:58:24,072 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 15 [2022-11-23 02:58:24,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:58:24,073 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2022-11-23 02:58:24,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2022-11-23 02:58:24,073 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2022-11-23 02:58:24,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-23 02:58:24,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:58:24,074 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:58:24,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 02:58:24,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-23 02:58:24,282 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:58:24,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:58:24,283 INFO L85 PathProgramCache]: Analyzing trace with hash -785961326, now seen corresponding path program 1 times [2022-11-23 02:58:24,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:58:24,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827026854] [2022-11-23 02:58:24,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:58:24,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:58:24,300 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:58:24,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1513663445] [2022-11-23 02:58:24,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:58:24,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:24,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:58:24,314 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:58:24,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 02:58:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:58:24,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 02:58:24,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:58:24,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:58:24,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:58:24,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:58:24,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827026854] [2022-11-23 02:58:24,500 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:58:24,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513663445] [2022-11-23 02:58:24,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513663445] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:58:24,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:58:24,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 02:58:24,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408361279] [2022-11-23 02:58:24,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:58:24,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:58:24,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:58:24,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:58:24,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:58:24,503 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:24,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:58:24,636 INFO L93 Difference]: Finished difference Result 78 states and 108 transitions. [2022-11-23 02:58:24,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:58:24,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 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 [2022-11-23 02:58:24,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:58:24,638 INFO L225 Difference]: With dead ends: 78 [2022-11-23 02:58:24,638 INFO L226 Difference]: Without dead ends: 51 [2022-11-23 02:58:24,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:58:24,640 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 57 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 02:58:24,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 33 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 02:58:24,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-23 02:58:24,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2022-11-23 02:58:24,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:24,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2022-11-23 02:58:24,652 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 18 [2022-11-23 02:58:24,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:58:24,653 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2022-11-23 02:58:24,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:24,653 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2022-11-23 02:58:24,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-23 02:58:24,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:58:24,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:58:24,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 02:58:24,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:24,861 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:58:24,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:58:24,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1148207861, now seen corresponding path program 1 times [2022-11-23 02:58:24,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:58:24,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631195242] [2022-11-23 02:58:24,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:58:24,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:58:24,880 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:58:24,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346186214] [2022-11-23 02:58:24,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:58:24,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:24,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:58:24,889 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:58:24,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 02:58:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:58:24,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 02:58:24,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:58:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:58:25,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:58:25,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:58:25,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631195242] [2022-11-23 02:58:25,035 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:58:25,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346186214] [2022-11-23 02:58:25,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346186214] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:58:25,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:58:25,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 02:58:25,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694453867] [2022-11-23 02:58:25,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:58:25,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:58:25,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:58:25,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:58:25,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:58:25,040 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:25,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:58:25,189 INFO L93 Difference]: Finished difference Result 80 states and 109 transitions. [2022-11-23 02:58:25,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:58:25,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-23 02:58:25,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:58:25,196 INFO L225 Difference]: With dead ends: 80 [2022-11-23 02:58:25,196 INFO L226 Difference]: Without dead ends: 51 [2022-11-23 02:58:25,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:58:25,207 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 75 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 02:58:25,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 38 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 02:58:25,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-23 02:58:25,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2022-11-23 02:58:25,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 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) [2022-11-23 02:58:25,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2022-11-23 02:58:25,263 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 21 [2022-11-23 02:58:25,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:58:25,269 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2022-11-23 02:58:25,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:25,269 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2022-11-23 02:58:25,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-23 02:58:25,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:58:25,270 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:58:25,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-23 02:58:25,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:25,471 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:58:25,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:58:25,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1730545667, now seen corresponding path program 1 times [2022-11-23 02:58:25,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:58:25,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358036153] [2022-11-23 02:58:25,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:58:25,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:58:25,493 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:58:25,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1948352319] [2022-11-23 02:58:25,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:58:25,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:25,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:58:25,503 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:58:25,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 02:58:25,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:58:25,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 02:58:25,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:58:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:58:25,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:58:25,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 02:58:25,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:58:25,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358036153] [2022-11-23 02:58:25,722 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:58:25,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948352319] [2022-11-23 02:58:25,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948352319] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:58:25,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:58:25,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-23 02:58:25,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925162481] [2022-11-23 02:58:25,723 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:58:25,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 02:58:25,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:58:25,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 02:58:25,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-11-23 02:58:25,725 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:25,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:58:25,941 INFO L93 Difference]: Finished difference Result 126 states and 174 transitions. [2022-11-23 02:58:25,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 02:58:25,942 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-23 02:58:25,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:58:25,946 INFO L225 Difference]: With dead ends: 126 [2022-11-23 02:58:25,946 INFO L226 Difference]: Without dead ends: 95 [2022-11-23 02:58:25,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-11-23 02:58:25,948 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 127 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 02:58:25,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 80 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 02:58:25,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-23 02:58:25,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 48. [2022-11-23 02:58:25,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 47 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:25,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2022-11-23 02:58:25,965 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 22 [2022-11-23 02:58:25,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:58:25,965 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2022-11-23 02:58:25,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:25,966 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2022-11-23 02:58:25,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 02:58:25,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:58:25,967 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:58:25,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-23 02:58:26,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:26,173 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:58:26,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:58:26,174 INFO L85 PathProgramCache]: Analyzing trace with hash 340179723, now seen corresponding path program 2 times [2022-11-23 02:58:26,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:58:26,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34036613] [2022-11-23 02:58:26,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:58:26,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:58:26,193 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:58:26,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2115047576] [2022-11-23 02:58:26,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:58:26,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:26,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:58:26,195 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:58:26,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 02:58:26,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-23 02:58:26,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:58:26,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 02:58:26,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:58:26,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 02:58:26,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:58:26,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:58:26,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34036613] [2022-11-23 02:58:26,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:58:26,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115047576] [2022-11-23 02:58:26,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115047576] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:58:26,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:58:26,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 02:58:26,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5204386] [2022-11-23 02:58:26,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:58:26,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:58:26,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:58:26,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:58:26,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:58:26,344 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:26,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:58:26,425 INFO L93 Difference]: Finished difference Result 109 states and 141 transitions. [2022-11-23 02:58:26,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:58:26,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-23 02:58:26,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:58:26,427 INFO L225 Difference]: With dead ends: 109 [2022-11-23 02:58:26,427 INFO L226 Difference]: Without dead ends: 82 [2022-11-23 02:58:26,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:58:26,429 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 53 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 02:58:26,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 45 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 02:58:26,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-23 02:58:26,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 49. [2022-11-23 02:58:26,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.3125) internal successors, (63), 48 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:26,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2022-11-23 02:58:26,445 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 25 [2022-11-23 02:58:26,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:58:26,445 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2022-11-23 02:58:26,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:26,446 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2022-11-23 02:58:26,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 02:58:26,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:58:26,447 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:58:26,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 02:58:26,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 02:58:26,653 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:58:26,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:58:26,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1522127699, now seen corresponding path program 1 times [2022-11-23 02:58:26,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:58:26,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560145399] [2022-11-23 02:58:26,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:58:26,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:58:26,680 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:58:26,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [477639541] [2022-11-23 02:58:26,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:58:26,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:26,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:58:26,694 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:58:26,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 02:58:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:58:26,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 02:58:26,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:58:26,886 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:58:26,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:58:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 02:58:26,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:58:26,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560145399] [2022-11-23 02:58:26,974 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:58:26,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477639541] [2022-11-23 02:58:26,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477639541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:58:26,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:58:26,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-11-23 02:58:26,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336508903] [2022-11-23 02:58:26,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:58:26,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 02:58:26,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:58:26,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 02:58:26,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-11-23 02:58:26,977 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:27,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:58:27,450 INFO L93 Difference]: Finished difference Result 236 states and 323 transitions. [2022-11-23 02:58:27,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 02:58:27,451 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-23 02:58:27,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:58:27,452 INFO L225 Difference]: With dead ends: 236 [2022-11-23 02:58:27,453 INFO L226 Difference]: Without dead ends: 192 [2022-11-23 02:58:27,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-11-23 02:58:27,454 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 562 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 02:58:27,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 125 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 02:58:27,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-23 02:58:27,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 73. [2022-11-23 02:58:27,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.2916666666666667) internal successors, (93), 72 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:27,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2022-11-23 02:58:27,489 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 28 [2022-11-23 02:58:27,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:58:27,490 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2022-11-23 02:58:27,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:27,490 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2022-11-23 02:58:27,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-23 02:58:27,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:58:27,492 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:58:27,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 02:58:27,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:27,705 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:58:27,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:58:27,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1337282643, now seen corresponding path program 2 times [2022-11-23 02:58:27,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:58:27,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653013076] [2022-11-23 02:58:27,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:58:27,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:58:27,740 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:58:27,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1956874143] [2022-11-23 02:58:27,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:58:27,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:27,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:58:27,743 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:58:27,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 02:58:27,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-23 02:58:27,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:58:27,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 02:58:27,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:58:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-23 02:58:28,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 02:58:28,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:58:28,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653013076] [2022-11-23 02:58:28,010 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:58:28,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956874143] [2022-11-23 02:58:28,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956874143] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 02:58:28,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 02:58:28,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 02:58:28,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006566995] [2022-11-23 02:58:28,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 02:58:28,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 02:58:28,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:58:28,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 02:58:28,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 02:58:28,013 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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) [2022-11-23 02:58:28,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:58:28,142 INFO L93 Difference]: Finished difference Result 170 states and 217 transitions. [2022-11-23 02:58:28,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 02:58:28,143 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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) Word has length 34 [2022-11-23 02:58:28,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:58:28,144 INFO L225 Difference]: With dead ends: 170 [2022-11-23 02:58:28,144 INFO L226 Difference]: Without dead ends: 131 [2022-11-23 02:58:28,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 02:58:28,148 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 71 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 02:58:28,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 24 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 02:58:28,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-23 02:58:28,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 74. [2022-11-23 02:58:28,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.2876712328767124) internal successors, (94), 73 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:28,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2022-11-23 02:58:28,180 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 34 [2022-11-23 02:58:28,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:58:28,182 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2022-11-23 02:58:28,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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) [2022-11-23 02:58:28,182 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2022-11-23 02:58:28,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-23 02:58:28,185 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:58:28,186 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:58:28,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 02:58:28,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-23 02:58:28,404 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:58:28,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:58:28,404 INFO L85 PathProgramCache]: Analyzing trace with hash 253285028, now seen corresponding path program 1 times [2022-11-23 02:58:28,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:58:28,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630273244] [2022-11-23 02:58:28,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:58:28,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:58:28,431 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:58:28,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [847948664] [2022-11-23 02:58:28,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:58:28,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:28,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:58:28,452 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:58:28,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 02:58:28,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 02:58:28,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 02:58:28,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:58:28,847 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:58:28,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:58:29,157 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:58:29,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:58:29,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630273244] [2022-11-23 02:58:29,158 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:58:29,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847948664] [2022-11-23 02:58:29,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847948664] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:58:29,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:58:29,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-11-23 02:58:29,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307993753] [2022-11-23 02:58:29,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:58:29,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 02:58:29,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:58:29,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 02:58:29,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-11-23 02:58:29,161 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:30,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:58:30,390 INFO L93 Difference]: Finished difference Result 476 states and 641 transitions. [2022-11-23 02:58:30,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-23 02:58:30,391 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-11-23 02:58:30,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:58:30,393 INFO L225 Difference]: With dead ends: 476 [2022-11-23 02:58:30,393 INFO L226 Difference]: Without dead ends: 407 [2022-11-23 02:58:30,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-11-23 02:58:30,395 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1009 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1009 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 02:58:30,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1009 Valid, 250 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 02:58:30,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-11-23 02:58:30,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 122. [2022-11-23 02:58:30,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.2727272727272727) internal successors, (154), 121 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:30,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 154 transitions. [2022-11-23 02:58:30,443 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 154 transitions. Word has length 37 [2022-11-23 02:58:30,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:58:30,443 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 154 transitions. [2022-11-23 02:58:30,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:30,444 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 154 transitions. [2022-11-23 02:58:30,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-23 02:58:30,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:58:30,445 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:58:30,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 02:58:30,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:30,651 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:58:30,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:58:30,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1853672612, now seen corresponding path program 2 times [2022-11-23 02:58:30,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:58:30,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993317412] [2022-11-23 02:58:30,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:58:30,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:58:30,691 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:58:30,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [787881664] [2022-11-23 02:58:30,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 02:58:30,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:30,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:58:30,693 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:58:30,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 02:58:30,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 02:58:30,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:58:30,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 02:58:30,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:58:31,471 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 2 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:58:31,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:58:32,332 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 2 proven. 253 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 02:58:32,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:58:32,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993317412] [2022-11-23 02:58:32,332 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:58:32,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787881664] [2022-11-23 02:58:32,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787881664] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:58:32,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:58:32,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-11-23 02:58:32,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713767240] [2022-11-23 02:58:32,333 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:58:32,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-23 02:58:32,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:58:32,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-23 02:58:32,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-11-23 02:58:32,336 INFO L87 Difference]: Start difference. First operand 122 states and 154 transitions. Second operand has 50 states, 50 states have (on average 1.54) internal successors, (77), 50 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:35,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:58:35,988 INFO L93 Difference]: Finished difference Result 932 states and 1253 transitions. [2022-11-23 02:58:35,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-23 02:58:35,989 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.54) internal successors, (77), 50 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-23 02:58:35,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:58:35,992 INFO L225 Difference]: With dead ends: 932 [2022-11-23 02:58:35,993 INFO L226 Difference]: Without dead ends: 815 [2022-11-23 02:58:35,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2022-11-23 02:58:35,996 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2819 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 606 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2819 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 606 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 02:58:35,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2819 Valid, 474 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [606 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 02:58:35,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-11-23 02:58:36,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 218. [2022-11-23 02:58:36,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 1.262672811059908) internal successors, (274), 217 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:36,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 274 transitions. [2022-11-23 02:58:36,049 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 274 transitions. Word has length 49 [2022-11-23 02:58:36,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:58:36,049 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 274 transitions. [2022-11-23 02:58:36,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.54) internal successors, (77), 50 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:36,050 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 274 transitions. [2022-11-23 02:58:36,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-23 02:58:36,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:58:36,051 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:58:36,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 02:58:36,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 02:58:36,257 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:58:36,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:58:36,258 INFO L85 PathProgramCache]: Analyzing trace with hash 391102628, now seen corresponding path program 3 times [2022-11-23 02:58:36,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:58:36,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897865712] [2022-11-23 02:58:36,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:58:36,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:58:36,320 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:58:36,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1651479372] [2022-11-23 02:58:36,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 02:58:36,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:36,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:58:36,323 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:58:36,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 02:58:36,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 02:58:36,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:58:36,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 02:58:36,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:58:36,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1084 trivial. 0 not checked. [2022-11-23 02:58:36,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:58:36,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1084 trivial. 0 not checked. [2022-11-23 02:58:36,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:58:36,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897865712] [2022-11-23 02:58:36,919 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:58:36,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651479372] [2022-11-23 02:58:36,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651479372] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:58:36,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:58:36,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-23 02:58:36,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513378188] [2022-11-23 02:58:36,919 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:58:36,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 02:58:36,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:58:36,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 02:58:36,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-23 02:58:36,921 INFO L87 Difference]: Start difference. First operand 218 states and 274 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 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) [2022-11-23 02:58:37,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:58:37,318 INFO L93 Difference]: Finished difference Result 989 states and 1257 transitions. [2022-11-23 02:58:37,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 02:58:37,318 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 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) Word has length 73 [2022-11-23 02:58:37,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:58:37,323 INFO L225 Difference]: With dead ends: 989 [2022-11-23 02:58:37,323 INFO L226 Difference]: Without dead ends: 828 [2022-11-23 02:58:37,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-11-23 02:58:37,325 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 332 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 02:58:37,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 40 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 02:58:37,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-11-23 02:58:37,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 389. [2022-11-23 02:58:37,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.1778350515463918) internal successors, (457), 388 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:37,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 457 transitions. [2022-11-23 02:58:37,444 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 457 transitions. Word has length 73 [2022-11-23 02:58:37,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:58:37,445 INFO L495 AbstractCegarLoop]: Abstraction has 389 states and 457 transitions. [2022-11-23 02:58:37,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 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) [2022-11-23 02:58:37,445 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 457 transitions. [2022-11-23 02:58:37,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-11-23 02:58:37,448 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:58:37,448 INFO L195 NwaCegarLoop]: trace histogram [184, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:58:37,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 02:58:37,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:37,655 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:58:37,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:58:37,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1903403635, now seen corresponding path program 4 times [2022-11-23 02:58:37,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:58:37,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950948015] [2022-11-23 02:58:37,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:58:37,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:58:37,767 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:58:37,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [629548994] [2022-11-23 02:58:37,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 02:58:37,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:37,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:58:37,769 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:58:37,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 02:58:38,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 02:58:38,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 02:58:38,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 02:58:38,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 02:58:38,515 INFO L134 CoverageAnalysis]: Checked inductivity of 17651 backedges. 8867 proven. 4432 refuted. 0 times theorem prover too weak. 4352 trivial. 0 not checked. [2022-11-23 02:58:38,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 02:58:38,861 INFO L134 CoverageAnalysis]: Checked inductivity of 17651 backedges. 6653 proven. 6646 refuted. 0 times theorem prover too weak. 4352 trivial. 0 not checked. [2022-11-23 02:58:38,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 02:58:38,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950948015] [2022-11-23 02:58:38,862 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 02:58:38,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629548994] [2022-11-23 02:58:38,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629548994] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 02:58:38,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 02:58:38,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-11-23 02:58:38,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688926705] [2022-11-23 02:58:38,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 02:58:38,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 02:58:38,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 02:58:38,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 02:58:38,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-23 02:58:38,865 INFO L87 Difference]: Start difference. First operand 389 states and 457 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:39,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 02:58:39,649 INFO L93 Difference]: Finished difference Result 1853 states and 2244 transitions. [2022-11-23 02:58:39,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 02:58:39,650 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2022-11-23 02:58:39,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 02:58:39,657 INFO L225 Difference]: With dead ends: 1853 [2022-11-23 02:58:39,657 INFO L226 Difference]: Without dead ends: 1519 [2022-11-23 02:58:39,658 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 464 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2022-11-23 02:58:39,659 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 253 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 02:58:39,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 59 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 02:58:39,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2022-11-23 02:58:39,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 726. [2022-11-23 02:58:39,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 1.1655172413793105) internal successors, (845), 725 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:39,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 845 transitions. [2022-11-23 02:58:39,894 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 845 transitions. Word has length 238 [2022-11-23 02:58:39,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 02:58:39,894 INFO L495 AbstractCegarLoop]: Abstraction has 726 states and 845 transitions. [2022-11-23 02:58:39,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 02:58:39,895 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 845 transitions. [2022-11-23 02:58:39,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2022-11-23 02:58:39,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 02:58:39,903 INFO L195 NwaCegarLoop]: trace histogram [368, 8, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 02:58:39,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 02:58:40,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 02:58:40,109 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 02:58:40,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 02:58:40,110 INFO L85 PathProgramCache]: Analyzing trace with hash 150263851, now seen corresponding path program 5 times [2022-11-23 02:58:40,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 02:58:40,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312390479] [2022-11-23 02:58:40,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 02:58:40,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 02:58:40,312 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 02:58:40,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [634931631] [2022-11-23 02:58:40,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-23 02:58:40,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 02:58:40,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 02:58:40,314 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 02:58:40,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7d1b4eea-cc17-4c26-87ec-4432e9bee3d7/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process