./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/diff-3-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-multidimensional/diff-3-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ae698f02be6e3657db0e7ca3e62c4cfb121d43a876624ed4d21d19b033e0c02e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 19:44:18,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 19:44:18,451 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 19:44:18,465 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 19:44:18,466 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 19:44:18,466 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 19:44:18,467 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 19:44:18,468 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 19:44:18,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 19:44:18,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 19:44:18,471 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 19:44:18,471 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 19:44:18,472 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 19:44:18,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 19:44:18,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 19:44:18,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 19:44:18,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 19:44:18,475 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 19:44:18,476 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 19:44:18,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 19:44:18,478 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 19:44:18,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 19:44:18,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 19:44:18,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 19:44:18,488 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 19:44:18,488 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 19:44:18,489 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 19:44:18,489 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 19:44:18,490 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 19:44:18,490 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 19:44:18,490 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 19:44:18,491 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 19:44:18,491 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 19:44:18,492 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 19:44:18,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 19:44:18,493 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 19:44:18,493 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 19:44:18,493 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 19:44:18,493 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 19:44:18,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 19:44:18,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 19:44:18,495 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 19:44:18,509 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 19:44:18,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 19:44:18,509 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 19:44:18,509 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 19:44:18,510 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 19:44:18,510 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 19:44:18,510 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 19:44:18,510 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 19:44:18,511 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 19:44:18,511 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 19:44:18,511 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 19:44:18,511 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 19:44:18,511 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 19:44:18,511 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 19:44:18,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 19:44:18,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 19:44:18,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 19:44:18,512 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 19:44:18,512 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 19:44:18,512 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 19:44:18,512 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 19:44:18,512 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 19:44:18,512 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 19:44:18,512 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 19:44:18,512 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:44:18,513 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 19:44:18,513 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 19:44:18,513 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 19:44:18,513 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 19:44:18,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 19:44:18,513 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 19:44:18,513 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 19:44:18,513 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 19:44:18,513 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 19:44:18,513 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 19:44:18,514 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_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ae698f02be6e3657db0e7ca3e62c4cfb121d43a876624ed4d21d19b033e0c02e [2022-12-13 19:44:18,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 19:44:18,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 19:44:18,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 19:44:18,703 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 19:44:18,703 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 19:44:18,704 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/array-multidimensional/diff-3-n-u.c [2022-12-13 19:44:21,274 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 19:44:21,478 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 19:44:21,478 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/sv-benchmarks/c/array-multidimensional/diff-3-n-u.c [2022-12-13 19:44:21,482 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/data/a04155196/8631194b10b44db992719da4812e5fef/FLAGc3c875d8c [2022-12-13 19:44:21,494 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/data/a04155196/8631194b10b44db992719da4812e5fef [2022-12-13 19:44:21,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 19:44:21,497 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 19:44:21,498 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 19:44:21,498 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 19:44:21,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 19:44:21,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:44:21" (1/1) ... [2022-12-13 19:44:21,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e43e1cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:44:21, skipping insertion in model container [2022-12-13 19:44:21,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 07:44:21" (1/1) ... [2022-12-13 19:44:21,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 19:44:21,526 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 19:44:21,650 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_5b970289-54a9-48cc-8806-b96a916424af/sv-benchmarks/c/array-multidimensional/diff-3-n-u.c[322,335] [2022-12-13 19:44:21,671 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:44:21,679 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 19:44:21,688 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_5b970289-54a9-48cc-8806-b96a916424af/sv-benchmarks/c/array-multidimensional/diff-3-n-u.c[322,335] [2022-12-13 19:44:21,701 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 19:44:21,713 INFO L208 MainTranslator]: Completed translation [2022-12-13 19:44:21,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:44:21 WrapperNode [2022-12-13 19:44:21,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 19:44:21,714 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 19:44:21,714 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 19:44:21,714 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 19:44:21,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:44:21" (1/1) ... [2022-12-13 19:44:21,725 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:44:21" (1/1) ... [2022-12-13 19:44:21,745 INFO L138 Inliner]: procedures = 14, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 118 [2022-12-13 19:44:21,746 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 19:44:21,746 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 19:44:21,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 19:44:21,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 19:44:21,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:44:21" (1/1) ... [2022-12-13 19:44:21,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:44:21" (1/1) ... [2022-12-13 19:44:21,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:44:21" (1/1) ... [2022-12-13 19:44:21,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:44:21" (1/1) ... [2022-12-13 19:44:21,761 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:44:21" (1/1) ... [2022-12-13 19:44:21,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:44:21" (1/1) ... [2022-12-13 19:44:21,767 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:44:21" (1/1) ... [2022-12-13 19:44:21,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:44:21" (1/1) ... [2022-12-13 19:44:21,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 19:44:21,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 19:44:21,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 19:44:21,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 19:44:21,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:44:21" (1/1) ... [2022-12-13 19:44:21,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 19:44:21,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:44:21,798 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 19:44:21,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 19:44:21,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 19:44:21,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 19:44:21,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 19:44:21,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 19:44:21,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 19:44:21,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 19:44:21,834 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 19:44:21,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 19:44:21,890 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 19:44:21,892 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 19:44:22,029 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 19:44:22,034 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 19:44:22,034 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-12-13 19:44:22,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:44:22 BoogieIcfgContainer [2022-12-13 19:44:22,036 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 19:44:22,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 19:44:22,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 19:44:22,040 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 19:44:22,040 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 07:44:21" (1/3) ... [2022-12-13 19:44:22,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d413f29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:44:22, skipping insertion in model container [2022-12-13 19:44:22,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 07:44:21" (2/3) ... [2022-12-13 19:44:22,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d413f29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 07:44:22, skipping insertion in model container [2022-12-13 19:44:22,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 07:44:22" (3/3) ... [2022-12-13 19:44:22,042 INFO L112 eAbstractionObserver]: Analyzing ICFG diff-3-n-u.c [2022-12-13 19:44:22,056 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 19:44:22,057 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 19:44:22,091 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 19:44:22,096 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;@5f6459c6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 19:44:22,096 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 19:44:22,100 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.8) internal successors, (45), 26 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) [2022-12-13 19:44:22,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 19:44:22,105 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:44:22,105 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:44:22,106 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:44:22,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:44:22,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1568356865, now seen corresponding path program 1 times [2022-12-13 19:44:22,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:44:22,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295704764] [2022-12-13 19:44:22,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:44:22,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:44:22,191 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:44:22,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [222800807] [2022-12-13 19:44:22,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:44:22,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:44:22,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:44:22,194 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:44:22,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 19:44:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:44:22,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 1 conjunts are in the unsatisfiable core [2022-12-13 19:44:22,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:44:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:44:22,301 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:44:22,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:44:22,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295704764] [2022-12-13 19:44:22,302 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:44:22,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222800807] [2022-12-13 19:44:22,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222800807] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:44:22,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:44:22,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 19:44:22,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328293608] [2022-12-13 19:44:22,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:44:22,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 19:44:22,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:44:22,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 19:44:22,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 19:44:22,332 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.8) internal successors, (45), 26 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:44:22,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:44:22,346 INFO L93 Difference]: Finished difference Result 52 states and 88 transitions. [2022-12-13 19:44:22,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 19:44:22,347 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-12-13 19:44:22,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:44:22,354 INFO L225 Difference]: With dead ends: 52 [2022-12-13 19:44:22,354 INFO L226 Difference]: Without dead ends: 23 [2022-12-13 19:44:22,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 19:44:22,359 INFO L413 NwaCegarLoop]: 35 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, 35 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:44:22,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:44:22,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-12-13 19:44:22,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-12-13 19:44:22,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:44:22,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2022-12-13 19:44:22,384 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 11 [2022-12-13 19:44:22,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:44:22,384 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2022-12-13 19:44:22,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:44:22,384 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2022-12-13 19:44:22,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 19:44:22,385 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:44:22,385 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:44:22,391 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 19:44:22,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-12-13 19:44:22,586 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:44:22,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:44:22,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1115669473, now seen corresponding path program 1 times [2022-12-13 19:44:22,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:44:22,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080076205] [2022-12-13 19:44:22,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:44:22,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:44:22,603 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:44:22,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1249948549] [2022-12-13 19:44:22,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:44:22,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:44:22,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:44:22,605 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:44:22,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 19:44:22,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:44:22,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 19:44:22,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:44:22,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:44:22,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:44:22,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:44:22,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080076205] [2022-12-13 19:44:22,707 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:44:22,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249948549] [2022-12-13 19:44:22,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249948549] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:44:22,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:44:22,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 19:44:22,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616259567] [2022-12-13 19:44:22,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:44:22,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 19:44:22,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:44:22,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 19:44:22,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:44:22,711 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:44:22,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:44:22,739 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2022-12-13 19:44:22,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 19:44:22,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2022-12-13 19:44:22,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:44:22,741 INFO L225 Difference]: With dead ends: 44 [2022-12-13 19:44:22,741 INFO L226 Difference]: Without dead ends: 28 [2022-12-13 19:44:22,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 19:44:22,743 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:44:22,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 45 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:44:22,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-13 19:44:22,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2022-12-13 19:44:22,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:44:22,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2022-12-13 19:44:22,749 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 11 [2022-12-13 19:44:22,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:44:22,750 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2022-12-13 19:44:22,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:44:22,750 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2022-12-13 19:44:22,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 19:44:22,751 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:44:22,751 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:44:22,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-13 19:44:22,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-13 19:44:22,953 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:44:22,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:44:22,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1536116311, now seen corresponding path program 1 times [2022-12-13 19:44:22,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:44:22,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633412538] [2022-12-13 19:44:22,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:44:22,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:44:23,002 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:44:23,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1703051155] [2022-12-13 19:44:23,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:44:23,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:44:23,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:44:23,005 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:44:23,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 19:44:23,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:44:23,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 19:44:23,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:44:23,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:44:23,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:44:23,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:44:23,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633412538] [2022-12-13 19:44:23,084 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:44:23,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703051155] [2022-12-13 19:44:23,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703051155] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:44:23,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:44:23,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:44:23,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582211636] [2022-12-13 19:44:23,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:44:23,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:44:23,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:44:23,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:44:23,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:44:23,086 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:44:23,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:44:23,136 INFO L93 Difference]: Finished difference Result 61 states and 84 transitions. [2022-12-13 19:44:23,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:44:23,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-13 19:44:23,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:44:23,137 INFO L225 Difference]: With dead ends: 61 [2022-12-13 19:44:23,138 INFO L226 Difference]: Without dead ends: 40 [2022-12-13 19:44:23,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:44:23,139 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 62 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:44:23,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 32 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:44:23,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-12-13 19:44:23,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2022-12-13 19:44:23,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:44:23,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2022-12-13 19:44:23,143 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 14 [2022-12-13 19:44:23,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:44:23,143 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2022-12-13 19:44:23,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:44:23,143 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2022-12-13 19:44:23,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 19:44:23,144 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:44:23,144 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:44:23,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 19:44:23,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:44:23,346 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:44:23,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:44:23,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1209800511, now seen corresponding path program 1 times [2022-12-13 19:44:23,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:44:23,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809847133] [2022-12-13 19:44:23,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:44:23,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:44:23,382 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:44:23,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [987477107] [2022-12-13 19:44:23,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:44:23,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:44:23,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:44:23,387 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:44:23,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 19:44:23,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:44:23,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 19:44:23,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:44:23,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:44:23,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:44:23,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:44:23,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809847133] [2022-12-13 19:44:23,529 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:44:23,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987477107] [2022-12-13 19:44:23,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987477107] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:44:23,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:44:23,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:44:23,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732538506] [2022-12-13 19:44:23,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:44:23,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:44:23,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:44:23,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:44:23,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:44:23,531 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:44:23,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:44:23,571 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2022-12-13 19:44:23,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:44:23,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-13 19:44:23,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:44:23,572 INFO L225 Difference]: With dead ends: 61 [2022-12-13 19:44:23,572 INFO L226 Difference]: Without dead ends: 37 [2022-12-13 19:44:23,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:44:23,574 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:44:23,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 40 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:44:23,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-13 19:44:23,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-12-13 19:44:23,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 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) [2022-12-13 19:44:23,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-12-13 19:44:23,581 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2022-12-13 19:44:23,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:44:23,581 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-12-13 19:44:23,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:44:23,582 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-12-13 19:44:23,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-13 19:44:23,582 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:44:23,583 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:44:23,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 19:44:23,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:44:23,784 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:44:23,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:44:23,785 INFO L85 PathProgramCache]: Analyzing trace with hash -97783142, now seen corresponding path program 1 times [2022-12-13 19:44:23,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:44:23,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818106466] [2022-12-13 19:44:23,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:44:23,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:44:23,812 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:44:23,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1159621042] [2022-12-13 19:44:23,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:44:23,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:44:23,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:44:23,814 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:44:23,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 19:44:23,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:44:23,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 19:44:23,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:44:23,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:44:23,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:44:23,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 19:44:23,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:44:23,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818106466] [2022-12-13 19:44:23,922 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:44:23,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159621042] [2022-12-13 19:44:23,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159621042] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:44:23,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:44:23,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-12-13 19:44:23,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188440392] [2022-12-13 19:44:23,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:44:23,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 19:44:23,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:44:23,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 19:44:23,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:44:23,924 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:44:24,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:44:24,010 INFO L93 Difference]: Finished difference Result 81 states and 107 transitions. [2022-12-13 19:44:24,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 19:44:24,011 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-13 19:44:24,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:44:24,011 INFO L225 Difference]: With dead ends: 81 [2022-12-13 19:44:24,011 INFO L226 Difference]: Without dead ends: 54 [2022-12-13 19:44:24,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:44:24,012 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 77 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:44:24,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 69 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:44:24,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-12-13 19:44:24,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 45. [2022-12-13 19:44:24,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 44 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:44:24,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2022-12-13 19:44:24,018 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 18 [2022-12-13 19:44:24,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:44:24,019 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2022-12-13 19:44:24,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:44:24,019 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2022-12-13 19:44:24,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 19:44:24,020 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:44:24,020 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:44:24,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 19:44:24,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:44:24,221 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:44:24,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:44:24,223 INFO L85 PathProgramCache]: Analyzing trace with hash 988124671, now seen corresponding path program 2 times [2022-12-13 19:44:24,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:44:24,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366697921] [2022-12-13 19:44:24,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:44:24,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:44:24,268 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:44:24,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2006399487] [2022-12-13 19:44:24,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:44:24,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:44:24,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:44:24,272 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:44:24,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 19:44:24,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 19:44:24,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:44:24,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 19:44:24,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:44:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 19:44:24,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 19:44:24,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:44:24,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366697921] [2022-12-13 19:44:24,459 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:44:24,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006399487] [2022-12-13 19:44:24,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006399487] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 19:44:24,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 19:44:24,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 19:44:24,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293846849] [2022-12-13 19:44:24,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 19:44:24,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 19:44:24,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:44:24,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 19:44:24,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 19:44:24,460 INFO L87 Difference]: Start difference. First operand 45 states and 56 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) [2022-12-13 19:44:24,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:44:24,499 INFO L93 Difference]: Finished difference Result 105 states and 131 transitions. [2022-12-13 19:44:24,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 19:44:24,500 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 21 [2022-12-13 19:44:24,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:44:24,501 INFO L225 Difference]: With dead ends: 105 [2022-12-13 19:44:24,501 INFO L226 Difference]: Without dead ends: 84 [2022-12-13 19:44:24,501 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 [2022-12-13 19:44:24,502 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 43 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 19:44:24,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 38 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 19:44:24,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-13 19:44:24,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 46. [2022-12-13 19:44:24,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 45 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:44:24,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2022-12-13 19:44:24,509 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 21 [2022-12-13 19:44:24,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:44:24,510 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2022-12-13 19:44:24,510 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) [2022-12-13 19:44:24,510 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2022-12-13 19:44:24,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-13 19:44:24,510 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:44:24,510 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:44:24,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 19:44:24,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:44:24,712 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:44:24,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:44:24,714 INFO L85 PathProgramCache]: Analyzing trace with hash 53106109, now seen corresponding path program 1 times [2022-12-13 19:44:24,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:44:24,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061313014] [2022-12-13 19:44:24,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:44:24,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:44:24,781 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:44:24,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [93490160] [2022-12-13 19:44:24,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:44:24,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:44:24,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:44:24,786 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:44:24,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 19:44:24,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 19:44:24,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 19:44:24,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:44:24,988 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 19:44:24,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:44:25,042 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 19:44:25,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:44:25,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061313014] [2022-12-13 19:44:25,042 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:44:25,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93490160] [2022-12-13 19:44:25,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93490160] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:44:25,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:44:25,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-12-13 19:44:25,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400448947] [2022-12-13 19:44:25,043 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:44:25,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 19:44:25,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:44:25,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 19:44:25,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-12-13 19:44:25,044 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:44:25,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:44:25,221 INFO L93 Difference]: Finished difference Result 138 states and 175 transitions. [2022-12-13 19:44:25,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 19:44:25,221 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 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 31 [2022-12-13 19:44:25,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:44:25,222 INFO L225 Difference]: With dead ends: 138 [2022-12-13 19:44:25,222 INFO L226 Difference]: Without dead ends: 95 [2022-12-13 19:44:25,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-12-13 19:44:25,223 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 167 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:44:25,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 65 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:44:25,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-12-13 19:44:25,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2022-12-13 19:44:25,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.24) internal successors, (93), 75 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) [2022-12-13 19:44:25,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2022-12-13 19:44:25,239 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 31 [2022-12-13 19:44:25,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:44:25,239 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2022-12-13 19:44:25,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:44:25,240 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2022-12-13 19:44:25,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 19:44:25,240 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:44:25,240 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:44:25,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 19:44:25,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:44:25,441 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:44:25,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:44:25,441 INFO L85 PathProgramCache]: Analyzing trace with hash 2141491421, now seen corresponding path program 2 times [2022-12-13 19:44:25,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:44:25,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279751055] [2022-12-13 19:44:25,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:44:25,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:44:25,463 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:44:25,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218153681] [2022-12-13 19:44:25,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 19:44:25,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:44:25,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:44:25,464 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:44:25,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 19:44:25,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 19:44:25,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:44:25,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 19:44:25,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:44:25,692 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-13 19:44:25,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:44:25,804 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 2 proven. 55 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-13 19:44:25,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:44:25,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279751055] [2022-12-13 19:44:25,805 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:44:25,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218153681] [2022-12-13 19:44:25,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218153681] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:44:25,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:44:25,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-12-13 19:44:25,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211529020] [2022-12-13 19:44:25,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:44:25,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-13 19:44:25,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:44:25,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-13 19:44:25,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-12-13 19:44:25,807 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:44:26,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:44:26,220 INFO L93 Difference]: Finished difference Result 252 states and 313 transitions. [2022-12-13 19:44:26,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 19:44:26,220 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-12-13 19:44:26,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:44:26,221 INFO L225 Difference]: With dead ends: 252 [2022-12-13 19:44:26,221 INFO L226 Difference]: Without dead ends: 179 [2022-12-13 19:44:26,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-12-13 19:44:26,222 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 502 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 19:44:26,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [502 Valid, 112 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 19:44:26,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-12-13 19:44:26,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 136. [2022-12-13 19:44:26,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.2222222222222223) internal successors, (165), 135 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:44:26,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 165 transitions. [2022-12-13 19:44:26,240 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 165 transitions. Word has length 43 [2022-12-13 19:44:26,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:44:26,240 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 165 transitions. [2022-12-13 19:44:26,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:44:26,241 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 165 transitions. [2022-12-13 19:44:26,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-12-13 19:44:26,241 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:44:26,241 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:44:26,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 19:44:26,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:44:26,442 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:44:26,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:44:26,443 INFO L85 PathProgramCache]: Analyzing trace with hash 587853597, now seen corresponding path program 3 times [2022-12-13 19:44:26,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:44:26,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834058797] [2022-12-13 19:44:26,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:44:26,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:44:26,495 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:44:26,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1919395920] [2022-12-13 19:44:26,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 19:44:26,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:44:26,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:44:26,499 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:44:26,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 19:44:26,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-13 19:44:26,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 19:44:26,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 19:44:26,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 19:44:26,782 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2022-12-13 19:44:26,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 19:44:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2022-12-13 19:44:26,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 19:44:26,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834058797] [2022-12-13 19:44:26,845 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 19:44:26,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919395920] [2022-12-13 19:44:26,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919395920] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 19:44:26,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 19:44:26,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-12-13 19:44:26,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058928621] [2022-12-13 19:44:26,846 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 19:44:26,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 19:44:26,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 19:44:26,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 19:44:26,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-12-13 19:44:26,847 INFO L87 Difference]: Start difference. First operand 136 states and 165 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 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) [2022-12-13 19:44:26,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 19:44:26,952 INFO L93 Difference]: Finished difference Result 632 states and 774 transitions. [2022-12-13 19:44:26,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 19:44:26,952 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 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) Word has length 67 [2022-12-13 19:44:26,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 19:44:26,954 INFO L225 Difference]: With dead ends: 632 [2022-12-13 19:44:26,954 INFO L226 Difference]: Without dead ends: 527 [2022-12-13 19:44:26,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-12-13 19:44:26,955 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 190 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 19:44:26,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 71 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 19:44:26,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-12-13 19:44:26,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 304. [2022-12-13 19:44:26,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.1386138613861385) internal successors, (345), 303 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 19:44:26,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 345 transitions. [2022-12-13 19:44:26,991 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 345 transitions. Word has length 67 [2022-12-13 19:44:26,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 19:44:26,992 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 345 transitions. [2022-12-13 19:44:26,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 8 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) [2022-12-13 19:44:26,992 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 345 transitions. [2022-12-13 19:44:26,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-12-13 19:44:26,994 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 19:44:26,994 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 19:44:26,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 19:44:27,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:44:27,196 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 19:44:27,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 19:44:27,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1854973743, now seen corresponding path program 4 times [2022-12-13 19:44:27,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 19:44:27,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115983886] [2022-12-13 19:44:27,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 19:44:27,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 19:44:27,336 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 19:44:27,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596295828] [2022-12-13 19:44:27,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 19:44:27,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 19:44:27,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 19:44:27,337 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 19:44:27,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b970289-54a9-48cc-8806-b96a916424af/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process