./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum1.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_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/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_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/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_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/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 8d05359bf1cd6e974dc237604ab15e53b702ce490bf8880eb5ddff78fcd04ff1 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 20:31:15,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 20:31:15,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 20:31:15,401 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 20:31:15,402 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 20:31:15,403 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 20:31:15,404 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 20:31:15,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 20:31:15,407 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 20:31:15,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 20:31:15,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 20:31:15,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 20:31:15,410 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 20:31:15,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 20:31:15,412 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 20:31:15,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 20:31:15,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 20:31:15,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 20:31:15,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 20:31:15,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 20:31:15,418 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 20:31:15,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 20:31:15,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 20:31:15,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 20:31:15,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 20:31:15,425 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 20:31:15,425 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 20:31:15,426 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 20:31:15,426 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 20:31:15,427 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 20:31:15,427 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 20:31:15,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 20:31:15,428 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 20:31:15,429 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 20:31:15,430 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 20:31:15,430 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 20:31:15,431 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 20:31:15,431 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 20:31:15,431 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 20:31:15,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 20:31:15,432 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 20:31:15,433 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 20:31:15,446 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 20:31:15,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 20:31:15,447 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 20:31:15,447 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 20:31:15,447 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 20:31:15,447 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 20:31:15,448 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 20:31:15,448 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 20:31:15,448 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 20:31:15,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 20:31:15,448 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 20:31:15,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 20:31:15,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 20:31:15,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 20:31:15,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 20:31:15,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 20:31:15,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 20:31:15,449 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 20:31:15,449 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 20:31:15,450 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 20:31:15,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 20:31:15,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 20:31:15,450 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 20:31:15,450 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 20:31:15,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:31:15,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 20:31:15,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 20:31:15,451 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 20:31:15,451 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 20:31:15,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 20:31:15,451 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 20:31:15,452 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 20:31:15,452 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 20:31:15,452 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 20:31:15,452 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 20:31:15,452 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_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d05359bf1cd6e974dc237604ab15e53b702ce490bf8880eb5ddff78fcd04ff1 [2022-12-13 20:31:15,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 20:31:15,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 20:31:15,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 20:31:15,679 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 20:31:15,679 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 20:31:15,680 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/array-crafted/zero_sum1.c [2022-12-13 20:31:18,253 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 20:31:18,399 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 20:31:18,399 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/sv-benchmarks/c/array-crafted/zero_sum1.c [2022-12-13 20:31:18,405 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/data/26012536c/c9c5d5f117914f7c8b22c59ac8b0c751/FLAG396ebf75b [2022-12-13 20:31:18,415 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/data/26012536c/c9c5d5f117914f7c8b22c59ac8b0c751 [2022-12-13 20:31:18,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 20:31:18,418 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 20:31:18,419 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 20:31:18,419 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 20:31:18,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 20:31:18,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:31:18" (1/1) ... [2022-12-13 20:31:18,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4542f597 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:31:18, skipping insertion in model container [2022-12-13 20:31:18,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 08:31:18" (1/1) ... [2022-12-13 20:31:18,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 20:31:18,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 20:31:18,541 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_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/sv-benchmarks/c/array-crafted/zero_sum1.c[400,413] [2022-12-13 20:31:18,553 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:31:18,559 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 20:31:18,568 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_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/sv-benchmarks/c/array-crafted/zero_sum1.c[400,413] [2022-12-13 20:31:18,572 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 20:31:18,582 INFO L208 MainTranslator]: Completed translation [2022-12-13 20:31:18,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:31:18 WrapperNode [2022-12-13 20:31:18,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 20:31:18,583 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 20:31:18,583 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 20:31:18,583 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 20:31:18,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:31:18" (1/1) ... [2022-12-13 20:31:18,594 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:31:18" (1/1) ... [2022-12-13 20:31:18,606 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2022-12-13 20:31:18,606 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 20:31:18,607 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 20:31:18,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 20:31:18,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 20:31:18,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:31:18" (1/1) ... [2022-12-13 20:31:18,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:31:18" (1/1) ... [2022-12-13 20:31:18,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:31:18" (1/1) ... [2022-12-13 20:31:18,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:31:18" (1/1) ... [2022-12-13 20:31:18,618 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:31:18" (1/1) ... [2022-12-13 20:31:18,621 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:31:18" (1/1) ... [2022-12-13 20:31:18,621 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:31:18" (1/1) ... [2022-12-13 20:31:18,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:31:18" (1/1) ... [2022-12-13 20:31:18,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 20:31:18,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 20:31:18,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 20:31:18,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 20:31:18,624 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:31:18" (1/1) ... [2022-12-13 20:31:18,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 20:31:18,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:31:18,647 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 20:31:18,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 20:31:18,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 20:31:18,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 20:31:18,674 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 20:31:18,674 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 20:31:18,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 20:31:18,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 20:31:18,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 20:31:18,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 20:31:18,729 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 20:31:18,730 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 20:31:18,825 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 20:31:18,830 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 20:31:18,830 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 20:31:18,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:31:18 BoogieIcfgContainer [2022-12-13 20:31:18,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 20:31:18,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 20:31:18,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 20:31:18,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 20:31:18,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 08:31:18" (1/3) ... [2022-12-13 20:31:18,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@991da73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:31:18, skipping insertion in model container [2022-12-13 20:31:18,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 08:31:18" (2/3) ... [2022-12-13 20:31:18,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@991da73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 08:31:18, skipping insertion in model container [2022-12-13 20:31:18,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 08:31:18" (3/3) ... [2022-12-13 20:31:18,840 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum1.c [2022-12-13 20:31:18,855 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 20:31:18,855 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 20:31:18,890 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 20:31:18,895 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;@b24112a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 20:31:18,896 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 20:31:18,899 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:18,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 20:31:18,904 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:31:18,904 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:31:18,904 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:31:18,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:31:18,909 INFO L85 PathProgramCache]: Analyzing trace with hash -718163050, now seen corresponding path program 1 times [2022-12-13 20:31:18,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:31:18,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503016685] [2022-12-13 20:31:18,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:31:18,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:31:18,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:31:19,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:31:19,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503016685] [2022-12-13 20:31:19,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503016685] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:31:19,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:31:19,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 20:31:19,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756526865] [2022-12-13 20:31:19,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:31:19,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 20:31:19,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:31:19,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 20:31:19,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 20:31:19,056 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 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 20:31:19,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:31:19,068 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2022-12-13 20:31:19,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 20:31:19,070 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 20:31:19,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:31:19,075 INFO L225 Difference]: With dead ends: 35 [2022-12-13 20:31:19,076 INFO L226 Difference]: Without dead ends: 15 [2022-12-13 20:31:19,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 20:31:19,080 INFO L413 NwaCegarLoop]: 23 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, 23 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 20:31:19,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:31:19,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-13 20:31:19,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-12-13 20:31:19,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:19,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-12-13 20:31:19,104 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2022-12-13 20:31:19,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:31:19,105 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-12-13 20:31:19,105 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 20:31:19,105 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-12-13 20:31:19,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-13 20:31:19,106 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:31:19,106 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:31:19,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 20:31:19,106 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:31:19,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:31:19,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1709876828, now seen corresponding path program 1 times [2022-12-13 20:31:19,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:31:19,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767815962] [2022-12-13 20:31:19,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:31:19,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:31:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:19,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:31:19,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:31:19,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767815962] [2022-12-13 20:31:19,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767815962] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:31:19,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:31:19,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 20:31:19,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959397289] [2022-12-13 20:31:19,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:31:19,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 20:31:19,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:31:19,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 20:31:19,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:31:19,185 INFO L87 Difference]: Start difference. First operand 15 states and 17 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 20:31:19,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:31:19,209 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-12-13 20:31:19,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 20:31:19,209 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 20:31:19,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:31:19,210 INFO L225 Difference]: With dead ends: 27 [2022-12-13 20:31:19,210 INFO L226 Difference]: Without dead ends: 17 [2022-12-13 20:31:19,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 20:31:19,212 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:31:19,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:31:19,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-13 20:31:19,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-12-13 20:31:19,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 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 20:31:19,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-12-13 20:31:19,216 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2022-12-13 20:31:19,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:31:19,216 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-12-13 20:31:19,216 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 20:31:19,217 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-12-13 20:31:19,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 20:31:19,217 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:31:19,217 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:31:19,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 20:31:19,218 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:31:19,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:31:19,218 INFO L85 PathProgramCache]: Analyzing trace with hash -2117745282, now seen corresponding path program 1 times [2022-12-13 20:31:19,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:31:19,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298174350] [2022-12-13 20:31:19,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:31:19,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:31:19,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:31:19,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:31:19,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298174350] [2022-12-13 20:31:19,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298174350] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 20:31:19,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 20:31:19,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 20:31:19,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191642803] [2022-12-13 20:31:19,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 20:31:19,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 20:31:19,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:31:19,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 20:31:19,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:31:19,290 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:19,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:31:19,323 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-12-13 20:31:19,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 20:31:19,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-13 20:31:19,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:31:19,324 INFO L225 Difference]: With dead ends: 27 [2022-12-13 20:31:19,324 INFO L226 Difference]: Without dead ends: 20 [2022-12-13 20:31:19,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 20:31:19,326 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:31:19,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 13 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:31:19,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-13 20:31:19,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-12-13 20:31:19,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:19,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-12-13 20:31:19,330 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2022-12-13 20:31:19,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:31:19,330 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-12-13 20:31:19,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:19,331 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-12-13 20:31:19,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-13 20:31:19,331 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:31:19,331 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 20:31:19,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 20:31:19,331 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:31:19,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:31:19,332 INFO L85 PathProgramCache]: Analyzing trace with hash -350467326, now seen corresponding path program 1 times [2022-12-13 20:31:19,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:31:19,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58031252] [2022-12-13 20:31:19,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:31:19,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:31:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:19,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:31:19,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:31:19,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58031252] [2022-12-13 20:31:19,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58031252] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:31:19,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949992896] [2022-12-13 20:31:19,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:31:19,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:31:19,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:31:19,404 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:31:19,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 20:31:19,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:19,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 20:31:19,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:31:19,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:31:19,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:31:19,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 20:31:19,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949992896] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:31:19,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:31:19,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-13 20:31:19,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829114545] [2022-12-13 20:31:19,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:31:19,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 20:31:19,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:31:19,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 20:31:19,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:31:19,571 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:19,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:31:19,600 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-12-13 20:31:19,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 20:31:19,601 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-12-13 20:31:19,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:31:19,601 INFO L225 Difference]: With dead ends: 33 [2022-12-13 20:31:19,601 INFO L226 Difference]: Without dead ends: 21 [2022-12-13 20:31:19,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-12-13 20:31:19,602 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:31:19,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 29 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:31:19,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-13 20:31:19,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-12-13 20:31:19,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:19,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-12-13 20:31:19,607 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2022-12-13 20:31:19,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:31:19,607 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-12-13 20:31:19,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:19,608 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-12-13 20:31:19,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-13 20:31:19,608 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:31:19,608 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:31:19,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 20:31:19,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-13 20:31:19,811 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:31:19,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:31:19,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1584924836, now seen corresponding path program 2 times [2022-12-13 20:31:19,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:31:19,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261168223] [2022-12-13 20:31:19,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:31:19,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:31:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 20:31:20,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:31:20,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261168223] [2022-12-13 20:31:20,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261168223] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:31:20,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621240131] [2022-12-13 20:31:20,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:31:20,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:31:20,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:31:20,011 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:31:20,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 20:31:20,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:31:20,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:31:20,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 20:31:20,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:31:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 20:31:20,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:31:20,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 20:31:20,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621240131] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:31:20,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:31:20,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-12-13 20:31:20,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612216283] [2022-12-13 20:31:20,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:31:20,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 20:31:20,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:31:20,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 20:31:20,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-12-13 20:31:20,134 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:20,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:31:20,177 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-12-13 20:31:20,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 20:31:20,177 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-13 20:31:20,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:31:20,178 INFO L225 Difference]: With dead ends: 34 [2022-12-13 20:31:20,178 INFO L226 Difference]: Without dead ends: 26 [2022-12-13 20:31:20,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-12-13 20:31:20,179 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:31:20,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 13 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:31:20,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-13 20:31:20,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-12-13 20:31:20,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:20,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-12-13 20:31:20,184 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2022-12-13 20:31:20,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:31:20,184 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-12-13 20:31:20,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:20,185 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-12-13 20:31:20,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-13 20:31:20,185 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:31:20,185 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:31:20,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 20:31:20,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:31:20,387 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:31:20,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:31:20,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1965660968, now seen corresponding path program 3 times [2022-12-13 20:31:20,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:31:20,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105878535] [2022-12-13 20:31:20,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:31:20,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:31:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:31:21,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:31:21,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105878535] [2022-12-13 20:31:21,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105878535] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:31:21,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057640673] [2022-12-13 20:31:21,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:31:21,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:31:21,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:31:21,228 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:31:21,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 20:31:21,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 20:31:21,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:31:21,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 20:31:21,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:31:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:31:21,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:31:22,205 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:31:22,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 62 [2022-12-13 20:31:22,359 INFO L321 Elim1Store]: treesize reduction 44, result has 17.0 percent of original size [2022-12-13 20:31:22,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 17 [2022-12-13 20:31:22,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:31:22,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057640673] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:31:22,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:31:22,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 38 [2022-12-13 20:31:22,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869237538] [2022-12-13 20:31:22,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:31:22,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-13 20:31:22,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:31:22,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-13 20:31:22,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1243, Unknown=0, NotChecked=0, Total=1406 [2022-12-13 20:31:22,642 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 38 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:23,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:31:23,514 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2022-12-13 20:31:23,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 20:31:23,514 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-13 20:31:23,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:31:23,515 INFO L225 Difference]: With dead ends: 49 [2022-12-13 20:31:23,515 INFO L226 Difference]: Without dead ends: 45 [2022-12-13 20:31:23,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=338, Invalid=2632, Unknown=0, NotChecked=0, Total=2970 [2022-12-13 20:31:23,516 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 20:31:23,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 58 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 20:31:23,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-12-13 20:31:23,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 29. [2022-12-13 20:31:23,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 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 20:31:23,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-12-13 20:31:23,521 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 23 [2022-12-13 20:31:23,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:31:23,521 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-12-13 20:31:23,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:23,521 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-12-13 20:31:23,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 20:31:23,522 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:31:23,522 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:31:23,526 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 20:31:23,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 20:31:23,724 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:31:23,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:31:23,726 INFO L85 PathProgramCache]: Analyzing trace with hash -732186678, now seen corresponding path program 4 times [2022-12-13 20:31:23,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:31:23,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756201407] [2022-12-13 20:31:23,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:31:23,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:31:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:23,846 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 20:31:23,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:31:23,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756201407] [2022-12-13 20:31:23,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756201407] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:31:23,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430771902] [2022-12-13 20:31:23,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 20:31:23,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:31:23,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:31:23,848 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:31:23,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 20:31:23,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 20:31:23,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:31:23,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 20:31:23,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:31:23,945 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 20:31:23,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:31:23,994 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 20:31:23,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430771902] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:31:23,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:31:23,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-12-13 20:31:23,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797053201] [2022-12-13 20:31:23,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:31:23,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 20:31:23,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:31:23,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 20:31:23,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-12-13 20:31:23,996 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:24,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:31:24,126 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2022-12-13 20:31:24,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 20:31:24,126 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-13 20:31:24,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:31:24,127 INFO L225 Difference]: With dead ends: 67 [2022-12-13 20:31:24,127 INFO L226 Difference]: Without dead ends: 37 [2022-12-13 20:31:24,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2022-12-13 20:31:24,128 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 58 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:31:24,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 44 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:31:24,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-13 20:31:24,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2022-12-13 20:31:24,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:24,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-12-13 20:31:24,133 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2022-12-13 20:31:24,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:31:24,133 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-12-13 20:31:24,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:24,133 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-12-13 20:31:24,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-13 20:31:24,134 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:31:24,134 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:31:24,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 20:31:24,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 20:31:24,335 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:31:24,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:31:24,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1031419092, now seen corresponding path program 5 times [2022-12-13 20:31:24,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:31:24,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798388533] [2022-12-13 20:31:24,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:31:24,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:31:24,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:24,521 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 20:31:24,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:31:24,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798388533] [2022-12-13 20:31:24,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798388533] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:31:24,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783586489] [2022-12-13 20:31:24,522 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 20:31:24,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:31:24,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:31:24,523 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:31:24,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 20:31:24,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 20:31:24,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:31:24,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 20:31:24,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:31:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 20:31:24,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:31:24,681 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 20:31:24,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783586489] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:31:24,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:31:24,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-12-13 20:31:24,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593745643] [2022-12-13 20:31:24,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:31:24,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 20:31:24,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:31:24,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 20:31:24,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-12-13 20:31:24,683 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 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 20:31:24,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:31:24,757 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2022-12-13 20:31:24,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 20:31:24,758 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 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) Word has length 27 [2022-12-13 20:31:24,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:31:24,758 INFO L225 Difference]: With dead ends: 36 [2022-12-13 20:31:24,758 INFO L226 Difference]: Without dead ends: 32 [2022-12-13 20:31:24,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-12-13 20:31:24,759 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 65 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:31:24,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 21 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 20:31:24,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-13 20:31:24,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-12-13 20:31:24,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 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 20:31:24,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-12-13 20:31:24,764 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2022-12-13 20:31:24,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:31:24,764 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-12-13 20:31:24,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 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 20:31:24,764 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-12-13 20:31:24,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 20:31:24,765 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:31:24,765 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:31:24,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 20:31:24,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-13 20:31:24,967 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:31:24,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:31:24,968 INFO L85 PathProgramCache]: Analyzing trace with hash 996931278, now seen corresponding path program 6 times [2022-12-13 20:31:24,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:31:24,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311192565] [2022-12-13 20:31:24,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:31:24,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:31:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:25,832 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:31:25,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:31:25,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311192565] [2022-12-13 20:31:25,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311192565] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:31:25,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018095605] [2022-12-13 20:31:25,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 20:31:25,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:31:25,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:31:25,833 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:31:25,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 20:31:25,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 20:31:25,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:31:25,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-13 20:31:25,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:31:25,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 20:31:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:31:26,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:31:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 20:31:26,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018095605] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:31:26,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:31:26,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 15] total 43 [2022-12-13 20:31:26,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63469287] [2022-12-13 20:31:26,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:31:26,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-12-13 20:31:26,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:31:26,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-12-13 20:31:26,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1657, Unknown=0, NotChecked=0, Total=1806 [2022-12-13 20:31:26,687 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 43 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 43 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:27,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:31:27,233 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2022-12-13 20:31:27,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-13 20:31:27,233 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 43 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-12-13 20:31:27,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:31:27,234 INFO L225 Difference]: With dead ends: 47 [2022-12-13 20:31:27,234 INFO L226 Difference]: Without dead ends: 43 [2022-12-13 20:31:27,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=210, Invalid=2340, Unknown=0, NotChecked=0, Total=2550 [2022-12-13 20:31:27,235 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 20:31:27,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 104 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 20:31:27,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-12-13 20:31:27,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2022-12-13 20:31:27,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 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 20:31:27,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-12-13 20:31:27,239 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 29 [2022-12-13 20:31:27,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:31:27,239 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-12-13 20:31:27,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 43 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:27,239 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-12-13 20:31:27,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-13 20:31:27,240 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:31:27,240 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:31:27,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 20:31:27,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:31:27,442 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:31:27,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:31:27,443 INFO L85 PathProgramCache]: Analyzing trace with hash 326484464, now seen corresponding path program 7 times [2022-12-13 20:31:27,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:31:27,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698144076] [2022-12-13 20:31:27,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:31:27,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:31:27,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:27,554 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 20:31:27,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:31:27,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698144076] [2022-12-13 20:31:27,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698144076] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:31:27,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021079536] [2022-12-13 20:31:27,554 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 20:31:27,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:31:27,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:31:27,555 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:31:27,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 20:31:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:27,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 20:31:27,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:31:27,677 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 20:31:27,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:31:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 20:31:27,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021079536] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:31:27,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:31:27,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-12-13 20:31:27,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415253103] [2022-12-13 20:31:27,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:31:27,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 20:31:27,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:31:27,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 20:31:27,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-12-13 20:31:27,745 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:27,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:31:27,866 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2022-12-13 20:31:27,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 20:31:27,867 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-12-13 20:31:27,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:31:27,867 INFO L225 Difference]: With dead ends: 68 [2022-12-13 20:31:27,867 INFO L226 Difference]: Without dead ends: 38 [2022-12-13 20:31:27,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 48 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2022-12-13 20:31:27,868 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:31:27,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 52 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:31:27,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-13 20:31:27,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-12-13 20:31:27,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:27,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2022-12-13 20:31:27,875 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 31 [2022-12-13 20:31:27,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:31:27,875 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2022-12-13 20:31:27,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:27,876 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2022-12-13 20:31:27,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-12-13 20:31:27,876 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:31:27,876 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:31:27,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 20:31:28,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:31:28,077 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:31:28,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:31:28,077 INFO L85 PathProgramCache]: Analyzing trace with hash -438567918, now seen corresponding path program 8 times [2022-12-13 20:31:28,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:31:28,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692477522] [2022-12-13 20:31:28,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:31:28,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:31:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:28,175 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:31:28,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:31:28,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692477522] [2022-12-13 20:31:28,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692477522] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:31:28,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735888006] [2022-12-13 20:31:28,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:31:28,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:31:28,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:31:28,177 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:31:28,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 20:31:28,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:31:28,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:31:28,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 20:31:28,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:31:28,297 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:31:28,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:31:28,356 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:31:28,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735888006] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:31:28,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:31:28,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-12-13 20:31:28,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783831965] [2022-12-13 20:31:28,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:31:28,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 20:31:28,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:31:28,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 20:31:28,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-12-13 20:31:28,358 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:28,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:31:28,460 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2022-12-13 20:31:28,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 20:31:28,460 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-12-13 20:31:28,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:31:28,460 INFO L225 Difference]: With dead ends: 52 [2022-12-13 20:31:28,460 INFO L226 Difference]: Without dead ends: 38 [2022-12-13 20:31:28,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2022-12-13 20:31:28,461 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 54 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:31:28,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 21 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:31:28,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-12-13 20:31:28,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-12-13 20:31:28,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 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 20:31:28,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-12-13 20:31:28,465 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2022-12-13 20:31:28,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:31:28,465 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-12-13 20:31:28,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:28,466 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-12-13 20:31:28,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 20:31:28,467 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:31:28,467 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:31:28,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 20:31:28,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 20:31:28,668 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:31:28,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:31:28,669 INFO L85 PathProgramCache]: Analyzing trace with hash -827015692, now seen corresponding path program 9 times [2022-12-13 20:31:28,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:31:28,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999338695] [2022-12-13 20:31:28,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:31:28,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:31:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:29,928 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:31:29,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:31:29,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999338695] [2022-12-13 20:31:29,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999338695] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:31:29,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532413517] [2022-12-13 20:31:29,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:31:29,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:31:29,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:31:29,930 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:31:29,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 20:31:29,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-13 20:31:29,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:31:29,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-13 20:31:29,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:31:30,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:31:30,757 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:31:30,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 39 [2022-12-13 20:31:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 20:31:30,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:31:33,532 INFO L321 Elim1Store]: treesize reduction 144, result has 40.2 percent of original size [2022-12-13 20:31:33,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 75 treesize of output 110 [2022-12-13 20:31:33,613 INFO L321 Elim1Store]: treesize reduction 224, result has 7.1 percent of original size [2022-12-13 20:31:33,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 74 treesize of output 29 [2022-12-13 20:31:33,836 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 20:31:33,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532413517] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:31:33,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:31:33,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 70 [2022-12-13 20:31:33,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200896108] [2022-12-13 20:31:33,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:31:33,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-12-13 20:31:33,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:31:33,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-12-13 20:31:33,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=4404, Unknown=0, NotChecked=0, Total=4830 [2022-12-13 20:31:33,840 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 70 states, 70 states have (on average 1.2714285714285714) internal successors, (89), 70 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:41,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:31:41,226 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2022-12-13 20:31:41,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-13 20:31:41,227 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.2714285714285714) internal successors, (89), 70 states have internal predecessors, (89), 0 states have call successors, (0), 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 35 [2022-12-13 20:31:41,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:31:41,227 INFO L225 Difference]: With dead ends: 55 [2022-12-13 20:31:41,227 INFO L226 Difference]: Without dead ends: 51 [2022-12-13 20:31:41,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2417 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=883, Invalid=8623, Unknown=0, NotChecked=0, Total=9506 [2022-12-13 20:31:41,230 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 53 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-13 20:31:41,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 85 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-13 20:31:41,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-13 20:31:41,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2022-12-13 20:31:41,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:41,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-12-13 20:31:41,239 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 35 [2022-12-13 20:31:41,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:31:41,239 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-12-13 20:31:41,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.2714285714285714) internal successors, (89), 70 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:41,239 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-12-13 20:31:41,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-13 20:31:41,239 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:31:41,239 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:31:41,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 20:31:41,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:31:41,442 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:31:41,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:31:41,443 INFO L85 PathProgramCache]: Analyzing trace with hash -139896938, now seen corresponding path program 10 times [2022-12-13 20:31:41,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:31:41,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889598518] [2022-12-13 20:31:41,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:31:41,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:31:41,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:41,586 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:31:41,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:31:41,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889598518] [2022-12-13 20:31:41,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889598518] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:31:41,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697298365] [2022-12-13 20:31:41,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 20:31:41,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:31:41,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:31:41,588 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:31:41,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 20:31:41,633 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 20:31:41,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:31:41,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 20:31:41,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:31:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:31:41,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:31:41,813 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:31:41,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697298365] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:31:41,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:31:41,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2022-12-13 20:31:41,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841983517] [2022-12-13 20:31:41,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:31:41,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 20:31:41,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:31:41,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 20:31:41,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2022-12-13 20:31:41,815 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:42,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:31:42,022 INFO L93 Difference]: Finished difference Result 95 states and 101 transitions. [2022-12-13 20:31:42,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-13 20:31:42,022 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-12-13 20:31:42,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:31:42,023 INFO L225 Difference]: With dead ends: 95 [2022-12-13 20:31:42,023 INFO L226 Difference]: Without dead ends: 49 [2022-12-13 20:31:42,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 53 SyntacticMatches, 10 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=937, Unknown=0, NotChecked=0, Total=1190 [2022-12-13 20:31:42,024 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 75 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:31:42,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 53 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:31:42,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-12-13 20:31:42,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2022-12-13 20:31:42,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:42,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-12-13 20:31:42,032 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2022-12-13 20:31:42,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:31:42,032 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-12-13 20:31:42,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:42,032 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-12-13 20:31:42,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 20:31:42,032 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:31:42,032 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:31:42,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 20:31:42,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 20:31:42,234 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:31:42,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:31:42,235 INFO L85 PathProgramCache]: Analyzing trace with hash 38479864, now seen corresponding path program 11 times [2022-12-13 20:31:42,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:31:42,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547211592] [2022-12-13 20:31:42,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:31:42,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:31:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 20:31:42,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:31:42,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547211592] [2022-12-13 20:31:42,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547211592] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:31:42,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741037724] [2022-12-13 20:31:42,370 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 20:31:42,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:31:42,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:31:42,371 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:31:42,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 20:31:42,462 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-13 20:31:42,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:31:42,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 20:31:42,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:31:42,573 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 20:31:42,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:31:42,653 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 20:31:42,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741037724] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:31:42,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:31:42,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2022-12-13 20:31:42,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336742874] [2022-12-13 20:31:42,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:31:42,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-13 20:31:42,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:31:42,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-13 20:31:42,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2022-12-13 20:31:42,655 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:42,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:31:42,791 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2022-12-13 20:31:42,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 20:31:42,792 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-12-13 20:31:42,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:31:42,792 INFO L225 Difference]: With dead ends: 48 [2022-12-13 20:31:42,792 INFO L226 Difference]: Without dead ends: 44 [2022-12-13 20:31:42,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 57 SyntacticMatches, 10 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=756, Unknown=0, NotChecked=0, Total=992 [2022-12-13 20:31:42,793 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 129 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:31:42,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 28 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:31:42,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-12-13 20:31:42,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-12-13 20:31:42,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:42,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2022-12-13 20:31:42,800 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2022-12-13 20:31:42,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:31:42,800 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2022-12-13 20:31:42,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:42,801 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2022-12-13 20:31:42,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 20:31:42,801 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:31:42,801 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:31:42,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 20:31:43,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 20:31:43,002 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:31:43,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:31:43,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1622323046, now seen corresponding path program 12 times [2022-12-13 20:31:43,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:31:43,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178981750] [2022-12-13 20:31:43,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:31:43,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:31:43,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:44,640 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:31:44,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:31:44,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178981750] [2022-12-13 20:31:44,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178981750] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:31:44,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090971671] [2022-12-13 20:31:44,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 20:31:44,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:31:44,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:31:44,641 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:31:44,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 20:31:44,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-12-13 20:31:44,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:31:44,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 65 conjunts are in the unsatisfiable core [2022-12-13 20:31:44,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:31:44,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 20:31:46,041 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:31:46,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2022-12-13 20:31:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 3 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 20:31:46,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:31:52,143 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 20:31:52,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090971671] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:31:52,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:31:52,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 27] total 80 [2022-12-13 20:31:52,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457012933] [2022-12-13 20:31:52,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:31:52,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-12-13 20:31:52,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:31:52,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-12-13 20:31:52,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=5949, Unknown=0, NotChecked=0, Total=6320 [2022-12-13 20:31:52,148 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 80 states, 80 states have (on average 1.2875) internal successors, (103), 80 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:57,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:31:57,820 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2022-12-13 20:31:57,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-12-13 20:31:57,820 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.2875) internal successors, (103), 80 states have internal predecessors, (103), 0 states have call successors, (0), 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 41 [2022-12-13 20:31:57,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:31:57,821 INFO L225 Difference]: With dead ends: 63 [2022-12-13 20:31:57,821 INFO L226 Difference]: Without dead ends: 59 [2022-12-13 20:31:57,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2846 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=831, Invalid=12509, Unknown=0, NotChecked=0, Total=13340 [2022-12-13 20:31:57,827 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 13 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 1817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-12-13 20:31:57,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 117 Invalid, 1817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1791 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-12-13 20:31:57,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-12-13 20:31:57,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2022-12-13 20:31:57,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:57,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-12-13 20:31:57,841 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 41 [2022-12-13 20:31:57,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:31:57,842 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-12-13 20:31:57,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.2875) internal successors, (103), 80 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:57,842 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-12-13 20:31:57,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 20:31:57,843 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:31:57,843 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:31:57,847 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 20:31:58,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 20:31:58,044 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:31:58,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:31:58,045 INFO L85 PathProgramCache]: Analyzing trace with hash 73914556, now seen corresponding path program 13 times [2022-12-13 20:31:58,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:31:58,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849397790] [2022-12-13 20:31:58,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:31:58,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:31:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:58,155 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 20:31:58,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:31:58,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849397790] [2022-12-13 20:31:58,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849397790] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:31:58,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646274949] [2022-12-13 20:31:58,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 20:31:58,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:31:58,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:31:58,156 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:31:58,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 20:31:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:58,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 20:31:58,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:31:58,339 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 20:31:58,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:31:58,433 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 20:31:58,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646274949] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:31:58,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:31:58,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-12-13 20:31:58,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442640847] [2022-12-13 20:31:58,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:31:58,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 20:31:58,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:31:58,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 20:31:58,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2022-12-13 20:31:58,435 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:58,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:31:58,607 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2022-12-13 20:31:58,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-13 20:31:58,607 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-12-13 20:31:58,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:31:58,607 INFO L225 Difference]: With dead ends: 92 [2022-12-13 20:31:58,607 INFO L226 Difference]: Without dead ends: 50 [2022-12-13 20:31:58,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 66 SyntacticMatches, 12 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2022-12-13 20:31:58,608 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:31:58,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 50 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:31:58,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-13 20:31:58,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-12-13 20:31:58,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:58,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-12-13 20:31:58,616 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 43 [2022-12-13 20:31:58,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:31:58,616 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-12-13 20:31:58,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:58,616 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-12-13 20:31:58,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 20:31:58,617 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:31:58,617 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:31:58,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-13 20:31:58,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 20:31:58,818 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:31:58,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:31:58,819 INFO L85 PathProgramCache]: Analyzing trace with hash -894570530, now seen corresponding path program 14 times [2022-12-13 20:31:58,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:31:58,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903884430] [2022-12-13 20:31:58,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:31:58,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:31:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:31:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-13 20:31:58,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:31:58,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903884430] [2022-12-13 20:31:58,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903884430] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:31:58,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562750287] [2022-12-13 20:31:58,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 20:31:58,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:31:58,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:31:58,953 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:31:58,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 20:31:59,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 20:31:59,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:31:59,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 20:31:59,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:31:59,115 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-13 20:31:59,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:31:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-13 20:31:59,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562750287] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 20:31:59,208 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 20:31:59,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-12-13 20:31:59,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799435181] [2022-12-13 20:31:59,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 20:31:59,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 20:31:59,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 20:31:59,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 20:31:59,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-12-13 20:31:59,210 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:59,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 20:31:59,349 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2022-12-13 20:31:59,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 20:31:59,350 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-12-13 20:31:59,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 20:31:59,350 INFO L225 Difference]: With dead ends: 68 [2022-12-13 20:31:59,350 INFO L226 Difference]: Without dead ends: 50 [2022-12-13 20:31:59,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 70 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2022-12-13 20:31:59,351 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 65 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 20:31:59,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 24 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 20:31:59,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-13 20:31:59,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-12-13 20:31:59,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:59,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-12-13 20:31:59,358 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2022-12-13 20:31:59,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 20:31:59,358 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-12-13 20:31:59,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 20:31:59,359 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-12-13 20:31:59,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-13 20:31:59,359 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 20:31:59,359 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 20:31:59,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-13 20:31:59,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 20:31:59,560 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 20:31:59,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 20:31:59,561 INFO L85 PathProgramCache]: Analyzing trace with hash 49745600, now seen corresponding path program 15 times [2022-12-13 20:31:59,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 20:31:59,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386927016] [2022-12-13 20:31:59,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 20:31:59,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 20:31:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 20:32:01,561 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 20:32:01,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 20:32:01,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386927016] [2022-12-13 20:32:01,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386927016] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 20:32:01,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110345023] [2022-12-13 20:32:01,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 20:32:01,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 20:32:01,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 20:32:01,563 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 20:32:01,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4a6fb147-ed2b-4e5d-ad7a-33b3c711d2df/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 20:32:01,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-12-13 20:32:01,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 20:32:01,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 72 conjunts are in the unsatisfiable core [2022-12-13 20:32:01,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 20:32:01,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 20:32:03,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:32:03,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:32:03,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:32:03,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:32:03,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 20:32:03,821 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 20:32:03,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 50 treesize of output 87 [2022-12-13 20:32:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 11 proven. 72 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 20:32:04,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 20:32:09,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 194 [2022-12-13 20:32:09,896 INFO L321 Elim1Store]: treesize reduction 144, result has 52.2 percent of original size [2022-12-13 20:32:09,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 5332 treesize of output 3441