./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --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 9040b900faf23bbe274a78992b583d0e69cb8306e352833058a15642ef75b25a --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 02:25:36,896 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 02:25:37,016 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 02:25:37,026 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 02:25:37,026 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 02:25:37,060 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 02:25:37,061 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 02:25:37,061 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 02:25:37,062 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 02:25:37,063 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 02:25:37,064 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 02:25:37,064 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 02:25:37,065 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 02:25:37,065 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 02:25:37,065 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 02:25:37,065 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 02:25:37,066 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 02:25:37,066 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 02:25:37,066 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 02:25:37,066 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 02:25:37,066 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 02:25:37,066 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 02:25:37,066 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 02:25:37,066 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 02:25:37,066 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 02:25:37,067 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 02:25:37,067 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 02:25:37,067 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 02:25:37,067 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 02:25:37,067 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:25:37,069 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:25:37,069 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:25:37,069 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:25:37,069 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 02:25:37,070 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 02:25:37,070 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 02:25:37,070 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 02:25:37,070 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:25:37,070 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 02:25:37,071 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 02:25:37,071 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 02:25:37,071 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 02:25:37,071 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 02:25:37,071 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 02:25:37,072 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 02:25:37,072 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 02:25:37,072 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 02:25:37,072 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 02:25:37,072 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness 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 -> 9040b900faf23bbe274a78992b583d0e69cb8306e352833058a15642ef75b25a [2024-11-28 02:25:37,462 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 02:25:37,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 02:25:37,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 02:25:37,479 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 02:25:37,480 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 02:25:37,481 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/array-crafted/zero_sum2.c [2024-11-28 02:25:41,147 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/data/f2046f12b/ee03fcc3bf6b49fd9705810dcd93e5fe/FLAG3ebf88348 [2024-11-28 02:25:41,549 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 02:25:41,553 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/sv-benchmarks/c/array-crafted/zero_sum2.c [2024-11-28 02:25:41,567 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/data/f2046f12b/ee03fcc3bf6b49fd9705810dcd93e5fe/FLAG3ebf88348 [2024-11-28 02:25:41,594 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/data/f2046f12b/ee03fcc3bf6b49fd9705810dcd93e5fe [2024-11-28 02:25:41,598 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 02:25:41,600 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 02:25:41,605 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 02:25:41,606 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 02:25:41,613 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 02:25:41,614 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:25:41" (1/1) ... [2024-11-28 02:25:41,616 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32edab1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:25:41, skipping insertion in model container [2024-11-28 02:25:41,619 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:25:41" (1/1) ... [2024-11-28 02:25:41,640 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 02:25:41,866 WARN L250 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_cf56b860-fdea-4ff8-9f11-f5560a9aff08/sv-benchmarks/c/array-crafted/zero_sum2.c[400,413] [2024-11-28 02:25:41,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:25:41,910 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 02:25:41,920 WARN L250 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_cf56b860-fdea-4ff8-9f11-f5560a9aff08/sv-benchmarks/c/array-crafted/zero_sum2.c[400,413] [2024-11-28 02:25:41,933 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 02:25:41,955 INFO L204 MainTranslator]: Completed translation [2024-11-28 02:25:41,956 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:25:41 WrapperNode [2024-11-28 02:25:41,956 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 02:25:41,957 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 02:25:41,958 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 02:25:41,958 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 02:25:41,968 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:25:41" (1/1) ... [2024-11-28 02:25:41,976 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:25:41" (1/1) ... [2024-11-28 02:25:42,003 INFO L138 Inliner]: procedures = 15, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 81 [2024-11-28 02:25:42,003 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 02:25:42,004 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 02:25:42,004 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 02:25:42,004 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 02:25:42,018 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:25:41" (1/1) ... [2024-11-28 02:25:42,019 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:25:41" (1/1) ... [2024-11-28 02:25:42,026 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:25:41" (1/1) ... [2024-11-28 02:25:42,053 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-28 02:25:42,053 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:25:41" (1/1) ... [2024-11-28 02:25:42,053 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:25:41" (1/1) ... [2024-11-28 02:25:42,063 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:25:41" (1/1) ... [2024-11-28 02:25:42,067 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:25:41" (1/1) ... [2024-11-28 02:25:42,075 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:25:41" (1/1) ... [2024-11-28 02:25:42,076 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:25:41" (1/1) ... [2024-11-28 02:25:42,077 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:25:41" (1/1) ... [2024-11-28 02:25:42,079 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 02:25:42,080 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 02:25:42,081 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 02:25:42,081 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 02:25:42,082 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:25:41" (1/1) ... [2024-11-28 02:25:42,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 02:25:42,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:25:42,126 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 02:25:42,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 02:25:42,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 02:25:42,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 02:25:42,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 02:25:42,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 02:25:42,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 02:25:42,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 02:25:42,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 02:25:42,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 02:25:42,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 02:25:42,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 02:25:42,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 02:25:42,297 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 02:25:42,300 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 02:25:42,557 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-11-28 02:25:42,558 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 02:25:42,569 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 02:25:42,570 INFO L312 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-28 02:25:42,570 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:25:42 BoogieIcfgContainer [2024-11-28 02:25:42,570 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 02:25:42,573 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 02:25:42,574 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 02:25:42,580 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 02:25:42,581 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:25:41" (1/3) ... [2024-11-28 02:25:42,582 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19546e74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:25:42, skipping insertion in model container [2024-11-28 02:25:42,582 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:25:41" (2/3) ... [2024-11-28 02:25:42,582 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19546e74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:25:42, skipping insertion in model container [2024-11-28 02:25:42,582 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:25:42" (3/3) ... [2024-11-28 02:25:42,584 INFO L128 eAbstractionObserver]: Analyzing ICFG zero_sum2.c [2024-11-28 02:25:42,605 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 02:25:42,607 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG zero_sum2.c that has 1 procedures, 26 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2024-11-28 02:25:42,681 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 02:25:42,697 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@10f419b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 02:25:42,697 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 02:25:42,702 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:25:42,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-28 02:25:42,709 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:25:42,710 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:25:42,711 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:25:42,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:25:42,718 INFO L85 PathProgramCache]: Analyzing trace with hash 2027865118, now seen corresponding path program 1 times [2024-11-28 02:25:42,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:25:42,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428485853] [2024-11-28 02:25:42,729 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:25:42,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:25:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:25:42,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:25:42,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:25:42,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428485853] [2024-11-28 02:25:42,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428485853] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:25:42,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:25:42,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 02:25:42,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499731694] [2024-11-28 02:25:42,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:25:42,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 02:25:42,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:25:42,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 02:25:42,958 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 02:25:42,961 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:25:42,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:25:42,977 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2024-11-28 02:25:42,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 02:25:42,980 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-28 02:25:42,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:25:42,988 INFO L225 Difference]: With dead ends: 47 [2024-11-28 02:25:42,989 INFO L226 Difference]: Without dead ends: 21 [2024-11-28 02:25:42,992 INFO L434 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 [2024-11-28 02:25:42,996 INFO L435 NwaCegarLoop]: 31 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, 31 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 [2024-11-28 02:25:42,997 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 02:25:43,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-28 02:25:43,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-28 02:25:43,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:25:43,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-11-28 02:25:43,036 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2024-11-28 02:25:43,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:25:43,037 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-11-28 02:25:43,037 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:25:43,037 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-11-28 02:25:43,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-28 02:25:43,038 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:25:43,038 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:25:43,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 02:25:43,040 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:25:43,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:25:43,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1511534242, now seen corresponding path program 1 times [2024-11-28 02:25:43,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:25:43,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178238353] [2024-11-28 02:25:43,041 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:25:43,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:25:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:25:43,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:25:43,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:25:43,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178238353] [2024-11-28 02:25:43,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178238353] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:25:43,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:25:43,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 02:25:43,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622943776] [2024-11-28 02:25:43,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:25:43,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 02:25:43,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:25:43,336 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 02:25:43,337 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 02:25:43,338 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:25:43,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:25:43,421 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2024-11-28 02:25:43,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 02:25:43,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-28 02:25:43,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:25:43,423 INFO L225 Difference]: With dead ends: 39 [2024-11-28 02:25:43,424 INFO L226 Difference]: Without dead ends: 23 [2024-11-28 02:25:43,424 INFO L434 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 [2024-11-28 02:25:43,425 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:25:43,428 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:25:43,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-28 02:25:43,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2024-11-28 02:25:43,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 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) [2024-11-28 02:25:43,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2024-11-28 02:25:43,437 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2024-11-28 02:25:43,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:25:43,437 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2024-11-28 02:25:43,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:25:43,438 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2024-11-28 02:25:43,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-28 02:25:43,438 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:25:43,438 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:25:43,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 02:25:43,439 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:25:43,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:25:43,439 INFO L85 PathProgramCache]: Analyzing trace with hash 57629062, now seen corresponding path program 1 times [2024-11-28 02:25:43,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:25:43,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228868307] [2024-11-28 02:25:43,440 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:25:43,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:25:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:25:43,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 02:25:43,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:25:43,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228868307] [2024-11-28 02:25:43,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228868307] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 02:25:43,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 02:25:43,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 02:25:43,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787716186] [2024-11-28 02:25:43,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 02:25:43,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 02:25:43,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:25:43,593 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 02:25:43,593 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 02:25:43,594 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:25:43,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:25:43,702 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2024-11-28 02:25:43,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 02:25:43,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-28 02:25:43,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:25:43,704 INFO L225 Difference]: With dead ends: 43 [2024-11-28 02:25:43,704 INFO L226 Difference]: Without dead ends: 30 [2024-11-28 02:25:43,704 INFO L434 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 [2024-11-28 02:25:43,705 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 23 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:25:43,706 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 15 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:25:43,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-28 02:25:43,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2024-11-28 02:25:43,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 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) [2024-11-28 02:25:43,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-11-28 02:25:43,714 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2024-11-28 02:25:43,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:25:43,715 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-11-28 02:25:43,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:25:43,715 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-11-28 02:25:43,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-28 02:25:43,716 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:25:43,716 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:25:43,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 02:25:43,717 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:25:43,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:25:43,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1328085098, now seen corresponding path program 1 times [2024-11-28 02:25:43,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:25:43,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284621539] [2024-11-28 02:25:43,718 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:25:43,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:25:43,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:25:43,941 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 02:25:43,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:25:43,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284621539] [2024-11-28 02:25:43,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284621539] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:25:43,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331315423] [2024-11-28 02:25:43,942 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 02:25:43,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:25:43,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:25:43,946 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:25:43,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 02:25:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:25:44,116 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 02:25:44,124 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:25:44,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 02:25:44,255 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:25:44,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 02:25:44,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331315423] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:25:44,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:25:44,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-28 02:25:44,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360603983] [2024-11-28 02:25:44,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:25:44,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 02:25:44,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:25:44,321 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 02:25:44,321 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:25:44,321 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2024-11-28 02:25:44,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:25:44,415 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2024-11-28 02:25:44,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 02:25:44,417 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) Word has length 25 [2024-11-28 02:25:44,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:25:44,418 INFO L225 Difference]: With dead ends: 49 [2024-11-28 02:25:44,418 INFO L226 Difference]: Without dead ends: 29 [2024-11-28 02:25:44,419 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2024-11-28 02:25:44,422 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:25:44,423 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 43 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:25:44,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-28 02:25:44,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2024-11-28 02:25:44,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 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) [2024-11-28 02:25:44,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2024-11-28 02:25:44,433 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2024-11-28 02:25:44,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:25:44,433 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2024-11-28 02:25:44,434 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.571428571428571) internal successors, (32), 7 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) [2024-11-28 02:25:44,434 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2024-11-28 02:25:44,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-28 02:25:44,435 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:25:44,435 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:25:44,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 02:25:44,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:25:44,640 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:25:44,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:25:44,641 INFO L85 PathProgramCache]: Analyzing trace with hash -93264518, now seen corresponding path program 2 times [2024-11-28 02:25:44,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:25:44,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053669876] [2024-11-28 02:25:44,641 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:25:44,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:25:44,676 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:25:44,676 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:25:44,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 02:25:44,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:25:44,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053669876] [2024-11-28 02:25:44,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053669876] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:25:44,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504763485] [2024-11-28 02:25:44,821 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:25:44,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:25:44,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:25:44,824 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:25:44,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 02:25:44,935 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:25:44,935 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:25:44,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 02:25:44,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:25:45,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 02:25:45,067 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:25:45,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-28 02:25:45,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504763485] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:25:45,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:25:45,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2024-11-28 02:25:45,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991164642] [2024-11-28 02:25:45,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:25:45,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 02:25:45,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:25:45,160 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 02:25:45,161 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-11-28 02:25:45,161 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2024-11-28 02:25:45,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:25:45,308 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2024-11-28 02:25:45,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 02:25:45,309 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) Word has length 27 [2024-11-28 02:25:45,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:25:45,310 INFO L225 Difference]: With dead ends: 56 [2024-11-28 02:25:45,310 INFO L226 Difference]: Without dead ends: 40 [2024-11-28 02:25:45,310 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2024-11-28 02:25:45,311 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:25:45,312 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 15 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 02:25:45,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-28 02:25:45,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2024-11-28 02:25:45,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 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) [2024-11-28 02:25:45,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2024-11-28 02:25:45,319 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2024-11-28 02:25:45,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:25:45,320 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2024-11-28 02:25:45,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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) [2024-11-28 02:25:45,320 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2024-11-28 02:25:45,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-28 02:25:45,323 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:25:45,323 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:25:45,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 02:25:45,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:25:45,524 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:25:45,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:25:45,525 INFO L85 PathProgramCache]: Analyzing trace with hash 337936266, now seen corresponding path program 3 times [2024-11-28 02:25:45,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:25:45,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506586666] [2024-11-28 02:25:45,525 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:25:45,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:25:45,708 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 02:25:45,708 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:25:48,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:25:48,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:25:48,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506586666] [2024-11-28 02:25:48,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506586666] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:25:48,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600558418] [2024-11-28 02:25:48,509 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:25:48,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:25:48,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:25:48,514 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:25:48,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 02:25:48,618 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-28 02:25:48,618 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:25:48,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-28 02:25:48,624 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:25:49,206 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 02:25:49,207 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:25:49,603 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:25:49,604 INFO L378 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 43 [2024-11-28 02:25:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 02:25:49,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600558418] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:25:49,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:25:49,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 30 [2024-11-28 02:25:49,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223254084] [2024-11-28 02:25:49,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:25:49,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 02:25:49,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:25:49,791 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 02:25:49,794 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2024-11-28 02:25:49,794 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 30 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:25:50,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:25:50,707 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2024-11-28 02:25:50,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 02:25:50,709 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 30 states have internal predecessors, (92), 0 states have call successors, (0), 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 [2024-11-28 02:25:50,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:25:50,710 INFO L225 Difference]: With dead ends: 65 [2024-11-28 02:25:50,712 INFO L226 Difference]: Without dead ends: 61 [2024-11-28 02:25:50,713 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 02:25:50,714 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:25:50,715 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 82 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 02:25:50,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-28 02:25:50,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2024-11-28 02:25:50,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:25:50,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2024-11-28 02:25:50,733 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 35 [2024-11-28 02:25:50,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:25:50,735 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2024-11-28 02:25:50,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.066666666666667) internal successors, (92), 30 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:25:50,736 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2024-11-28 02:25:50,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-28 02:25:50,740 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:25:50,740 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:25:50,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 02:25:50,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-28 02:25:50,941 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:25:50,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:25:50,942 INFO L85 PathProgramCache]: Analyzing trace with hash 705509806, now seen corresponding path program 4 times [2024-11-28 02:25:50,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:25:50,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893929669] [2024-11-28 02:25:50,942 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:25:50,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:25:50,963 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:25:50,964 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:25:51,088 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 02:25:51,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:25:51,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893929669] [2024-11-28 02:25:51,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893929669] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:25:51,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87155165] [2024-11-28 02:25:51,089 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:25:51,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:25:51,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:25:51,094 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:25:51,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 02:25:51,169 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:25:51,169 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:25:51,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 02:25:51,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:25:51,275 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 02:25:51,275 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:25:51,372 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 02:25:51,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87155165] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:25:51,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:25:51,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2024-11-28 02:25:51,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788514329] [2024-11-28 02:25:51,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:25:51,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 02:25:51,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:25:51,375 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 02:25:51,375 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-28 02:25:51,376 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:25:51,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:25:51,723 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2024-11-28 02:25:51,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 02:25:51,725 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 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 [2024-11-28 02:25:51,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:25:51,726 INFO L225 Difference]: With dead ends: 81 [2024-11-28 02:25:51,726 INFO L226 Difference]: Without dead ends: 65 [2024-11-28 02:25:51,727 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 64 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2024-11-28 02:25:51,728 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:25:51,728 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 32 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:25:51,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-28 02:25:51,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2024-11-28 02:25:51,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.14) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:25:51,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2024-11-28 02:25:51,746 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 37 [2024-11-28 02:25:51,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:25:51,746 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2024-11-28 02:25:51,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:25:51,747 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2024-11-28 02:25:51,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-28 02:25:51,748 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:25:51,748 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:25:51,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 02:25:51,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-28 02:25:51,953 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:25:51,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:25:51,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1721985682, now seen corresponding path program 5 times [2024-11-28 02:25:51,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:25:51,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237753189] [2024-11-28 02:25:51,954 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:25:51,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:25:51,989 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 02:25:51,992 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:25:52,145 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 02:25:52,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:25:52,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237753189] [2024-11-28 02:25:52,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237753189] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:25:52,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039878890] [2024-11-28 02:25:52,146 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:25:52,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:25:52,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:25:52,149 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:25:52,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 02:25:52,260 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-28 02:25:52,260 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:25:52,262 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 02:25:52,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:25:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 02:25:52,427 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:25:52,569 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 02:25:52,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039878890] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:25:52,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:25:52,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2024-11-28 02:25:52,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054691764] [2024-11-28 02:25:52,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:25:52,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 02:25:52,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:25:52,572 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 02:25:52,572 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-28 02:25:52,573 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:25:52,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:25:52,792 INFO L93 Difference]: Finished difference Result 108 states and 121 transitions. [2024-11-28 02:25:52,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 02:25:52,793 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 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 [2024-11-28 02:25:52,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:25:52,794 INFO L225 Difference]: With dead ends: 108 [2024-11-28 02:25:52,794 INFO L226 Difference]: Without dead ends: 54 [2024-11-28 02:25:52,795 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 65 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-28 02:25:52,795 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:25:52,796 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 55 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:25:52,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-28 02:25:52,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2024-11-28 02:25:52,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:25:52,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2024-11-28 02:25:52,814 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 37 [2024-11-28 02:25:52,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:25:52,815 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2024-11-28 02:25:52,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:25:52,815 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2024-11-28 02:25:52,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-28 02:25:52,817 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:25:52,817 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:25:52,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 02:25:53,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:25:53,018 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:25:53,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:25:53,019 INFO L85 PathProgramCache]: Analyzing trace with hash -825967278, now seen corresponding path program 6 times [2024-11-28 02:25:53,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:25:53,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80138976] [2024-11-28 02:25:53,019 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:25:53,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:25:53,075 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-28 02:25:53,075 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:25:53,233 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 02:25:53,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:25:53,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80138976] [2024-11-28 02:25:53,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80138976] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:25:53,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223775614] [2024-11-28 02:25:53,234 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:25:53,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:25:53,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:25:53,237 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:25:53,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 02:25:53,326 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-28 02:25:53,326 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:25:53,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 02:25:53,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:25:53,499 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 02:25:53,500 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:25:53,675 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-28 02:25:53,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223775614] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:25:53,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:25:53,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2024-11-28 02:25:53,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257424837] [2024-11-28 02:25:53,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:25:53,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 02:25:53,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:25:53,677 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 02:25:53,678 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2024-11-28 02:25:53,678 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:25:54,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:25:54,043 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2024-11-28 02:25:54,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 02:25:54,044 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-28 02:25:54,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:25:54,045 INFO L225 Difference]: With dead ends: 79 [2024-11-28 02:25:54,045 INFO L226 Difference]: Without dead ends: 50 [2024-11-28 02:25:54,046 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2024-11-28 02:25:54,046 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 44 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:25:54,047 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 64 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:25:54,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-28 02:25:54,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2024-11-28 02:25:54,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 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) [2024-11-28 02:25:54,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2024-11-28 02:25:54,062 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2024-11-28 02:25:54,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:25:54,063 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2024-11-28 02:25:54,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:25:54,063 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2024-11-28 02:25:54,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 02:25:54,064 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:25:54,064 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:25:54,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 02:25:54,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:25:54,269 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:25:54,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:25:54,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1533159810, now seen corresponding path program 7 times [2024-11-28 02:25:54,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:25:54,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432836855] [2024-11-28 02:25:54,271 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:25:54,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:25:54,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:25:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:25:57,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:25:57,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432836855] [2024-11-28 02:25:57,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432836855] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:25:57,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121383808] [2024-11-28 02:25:57,046 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:25:57,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:25:57,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:25:57,049 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:25:57,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 02:25:57,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:25:57,160 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-28 02:25:57,164 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:25:57,243 INFO L378 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 1 [2024-11-28 02:25:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:25:57,810 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:25:58,383 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-28 02:25:58,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121383808] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:25:58,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:25:58,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 15, 11] total 38 [2024-11-28 02:25:58,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149444779] [2024-11-28 02:25:58,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:25:58,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-28 02:25:58,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:25:58,385 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-28 02:25:58,386 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 02:25:58,387 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 38 states, 38 states have (on average 2.9210526315789473) internal successors, (111), 38 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:25:59,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:25:59,807 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2024-11-28 02:25:59,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 02:25:59,808 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.9210526315789473) internal successors, (111), 38 states have internal predecessors, (111), 0 states have call successors, (0), 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 [2024-11-28 02:25:59,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:25:59,809 INFO L225 Difference]: With dead ends: 81 [2024-11-28 02:25:59,810 INFO L226 Difference]: Without dead ends: 77 [2024-11-28 02:25:59,811 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=216, Invalid=1854, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 02:25:59,812 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 41 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:25:59,813 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 92 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 02:25:59,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-28 02:25:59,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2024-11-28 02:25:59,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.121212121212121) internal successors, (74), 66 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:25:59,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2024-11-28 02:25:59,834 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 45 [2024-11-28 02:25:59,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:25:59,834 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2024-11-28 02:25:59,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.9210526315789473) internal successors, (111), 38 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:25:59,834 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2024-11-28 02:25:59,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-28 02:25:59,837 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:25:59,838 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:25:59,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-28 02:26:00,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:00,042 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:26:00,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:26:00,043 INFO L85 PathProgramCache]: Analyzing trace with hash -191593566, now seen corresponding path program 8 times [2024-11-28 02:26:00,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:26:00,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867186297] [2024-11-28 02:26:00,043 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:26:00,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:26:00,063 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:26:00,064 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:00,244 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-28 02:26:00,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:26:00,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867186297] [2024-11-28 02:26:00,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867186297] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:26:00,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623711090] [2024-11-28 02:26:00,245 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:26:00,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:00,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:26:00,248 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:26:00,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 02:26:00,354 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:26:00,354 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:00,356 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 02:26:00,358 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:26:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-28 02:26:00,520 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:26:00,636 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-28 02:26:00,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623711090] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:26:00,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:26:00,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-28 02:26:00,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719370150] [2024-11-28 02:26:00,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:26:00,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 02:26:00,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:26:00,638 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 02:26:00,638 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2024-11-28 02:26:00,640 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:00,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:26:00,929 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2024-11-28 02:26:00,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 02:26:00,930 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2024-11-28 02:26:00,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:26:00,931 INFO L225 Difference]: With dead ends: 132 [2024-11-28 02:26:00,931 INFO L226 Difference]: Without dead ends: 70 [2024-11-28 02:26:00,932 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 81 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2024-11-28 02:26:00,934 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:26:00,934 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 50 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:26:00,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-28 02:26:00,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2024-11-28 02:26:00,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 68 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:00,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2024-11-28 02:26:00,952 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 47 [2024-11-28 02:26:00,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:26:00,954 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2024-11-28 02:26:00,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:00,955 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2024-11-28 02:26:00,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 02:26:00,956 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:26:00,956 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:26:00,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 02:26:01,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:01,157 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:26:01,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:26:01,159 INFO L85 PathProgramCache]: Analyzing trace with hash -85516666, now seen corresponding path program 9 times [2024-11-28 02:26:01,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:26:01,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336030963] [2024-11-28 02:26:01,159 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:26:01,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:26:01,207 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 02:26:01,208 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:01,400 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-28 02:26:01,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:26:01,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336030963] [2024-11-28 02:26:01,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336030963] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:26:01,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231148607] [2024-11-28 02:26:01,400 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:26:01,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:01,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:26:01,403 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:26:01,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 02:26:01,506 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 02:26:01,506 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:01,508 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 02:26:01,510 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:26:01,663 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-28 02:26:01,663 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:26:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-28 02:26:01,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231148607] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:26:01,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:26:01,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-28 02:26:01,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167548361] [2024-11-28 02:26:01,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:26:01,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 02:26:01,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:26:01,812 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 02:26:01,813 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2024-11-28 02:26:01,814 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:02,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:26:02,300 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2024-11-28 02:26:02,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 02:26:02,301 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-11-28 02:26:02,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:26:02,302 INFO L225 Difference]: With dead ends: 103 [2024-11-28 02:26:02,302 INFO L226 Difference]: Without dead ends: 83 [2024-11-28 02:26:02,303 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 84 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2024-11-28 02:26:02,304 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:26:02,304 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 54 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:26:02,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-28 02:26:02,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 65. [2024-11-28 02:26:02,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.109375) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:02,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2024-11-28 02:26:02,324 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 49 [2024-11-28 02:26:02,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:26:02,325 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2024-11-28 02:26:02,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:02,325 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2024-11-28 02:26:02,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 02:26:02,326 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:26:02,329 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:26:02,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 02:26:02,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-28 02:26:02,530 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:26:02,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:26:02,531 INFO L85 PathProgramCache]: Analyzing trace with hash -147940794, now seen corresponding path program 10 times [2024-11-28 02:26:02,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:26:02,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298870191] [2024-11-28 02:26:02,532 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:26:02,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:26:02,547 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:26:02,547 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:02,688 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-28 02:26:02,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:26:02,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298870191] [2024-11-28 02:26:02,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298870191] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:26:02,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488279738] [2024-11-28 02:26:02,689 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:26:02,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:02,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:26:02,691 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:26:02,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 02:26:02,781 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:26:02,781 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:02,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 02:26:02,784 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:26:02,957 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-28 02:26:02,958 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:26:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-28 02:26:03,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488279738] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:26:03,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:26:03,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2024-11-28 02:26:03,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874021139] [2024-11-28 02:26:03,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:26:03,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 02:26:03,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:26:03,083 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 02:26:03,083 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2024-11-28 02:26:03,083 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:03,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:26:03,436 INFO L93 Difference]: Finished difference Result 110 states and 119 transitions. [2024-11-28 02:26:03,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 02:26:03,438 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-11-28 02:26:03,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:26:03,439 INFO L225 Difference]: With dead ends: 110 [2024-11-28 02:26:03,440 INFO L226 Difference]: Without dead ends: 60 [2024-11-28 02:26:03,441 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2024-11-28 02:26:03,441 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 60 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:26:03,442 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 33 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:26:03,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-28 02:26:03,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2024-11-28 02:26:03,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:03,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2024-11-28 02:26:03,458 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2024-11-28 02:26:03,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:26:03,459 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2024-11-28 02:26:03,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:03,459 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2024-11-28 02:26:03,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-28 02:26:03,459 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:26:03,460 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:26:03,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 02:26:03,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 02:26:03,660 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:26:03,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:26:03,661 INFO L85 PathProgramCache]: Analyzing trace with hash -917484430, now seen corresponding path program 11 times [2024-11-28 02:26:03,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:26:03,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298640941] [2024-11-28 02:26:03,661 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:26:03,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:26:03,742 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 02:26:03,742 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:06,242 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:26:06,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:26:06,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298640941] [2024-11-28 02:26:06,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298640941] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:26:06,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160470320] [2024-11-28 02:26:06,243 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:26:06,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:06,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:26:06,246 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:26:06,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 02:26:06,442 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-28 02:26:06,442 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:06,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-28 02:26:06,448 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:26:06,643 INFO L378 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 1 [2024-11-28 02:26:06,700 INFO L378 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 1 [2024-11-28 02:26:07,514 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:26:07,515 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:26:07,910 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 02:26:07,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160470320] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:26:07,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:26:07,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 13] total 39 [2024-11-28 02:26:07,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056145292] [2024-11-28 02:26:07,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:26:07,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-28 02:26:07,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:26:07,915 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-28 02:26:07,916 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1360, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 02:26:07,916 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 39 states, 39 states have (on average 3.3846153846153846) internal successors, (132), 39 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:08,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:26:08,966 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2024-11-28 02:26:08,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 02:26:08,966 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.3846153846153846) internal successors, (132), 39 states have internal predecessors, (132), 0 states have call successors, (0), 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 55 [2024-11-28 02:26:08,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:26:08,967 INFO L225 Difference]: With dead ends: 97 [2024-11-28 02:26:08,967 INFO L226 Difference]: Without dead ends: 93 [2024-11-28 02:26:08,968 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=122, Invalid=1360, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 02:26:08,969 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 02:26:08,969 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 193 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 02:26:08,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-11-28 02:26:08,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2024-11-28 02:26:08,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1) internal successors, (88), 80 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:08,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2024-11-28 02:26:08,983 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 55 [2024-11-28 02:26:08,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:26:08,984 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2024-11-28 02:26:08,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.3846153846153846) internal successors, (132), 39 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:08,984 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2024-11-28 02:26:08,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-28 02:26:08,986 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:26:08,987 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:26:08,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 02:26:09,187 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 02:26:09,187 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:26:09,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:26:09,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1972294506, now seen corresponding path program 12 times [2024-11-28 02:26:09,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:26:09,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027568917] [2024-11-28 02:26:09,188 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:26:09,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:26:09,225 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-28 02:26:09,226 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:09,422 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-28 02:26:09,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:26:09,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027568917] [2024-11-28 02:26:09,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027568917] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:26:09,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811979908] [2024-11-28 02:26:09,423 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:26:09,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:09,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:26:09,425 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:26:09,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 02:26:09,519 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-28 02:26:09,519 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:09,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 02:26:09,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:26:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-28 02:26:09,683 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:26:09,841 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-28 02:26:09,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811979908] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:26:09,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:26:09,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-11-28 02:26:09,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012742522] [2024-11-28 02:26:09,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:26:09,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 02:26:09,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:26:09,843 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 02:26:09,843 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-11-28 02:26:09,843 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:10,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:26:10,320 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2024-11-28 02:26:10,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 02:26:10,320 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 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 57 [2024-11-28 02:26:10,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:26:10,321 INFO L225 Difference]: With dead ends: 121 [2024-11-28 02:26:10,321 INFO L226 Difference]: Without dead ends: 97 [2024-11-28 02:26:10,322 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 97 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2024-11-28 02:26:10,322 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 66 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:26:10,323 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 61 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:26:10,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-28 02:26:10,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 75. [2024-11-28 02:26:10,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0945945945945945) internal successors, (81), 74 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:10,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2024-11-28 02:26:10,339 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 57 [2024-11-28 02:26:10,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:26:10,339 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2024-11-28 02:26:10,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:10,339 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2024-11-28 02:26:10,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-28 02:26:10,340 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:26:10,340 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:26:10,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-28 02:26:10,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 02:26:10,541 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:26:10,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:26:10,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1295464362, now seen corresponding path program 13 times [2024-11-28 02:26:10,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:26:10,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728781769] [2024-11-28 02:26:10,542 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:26:10,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:26:10,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:26:10,727 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-28 02:26:10,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:26:10,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728781769] [2024-11-28 02:26:10,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728781769] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:26:10,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414702481] [2024-11-28 02:26:10,728 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:26:10,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:10,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:26:10,732 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:26:10,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 02:26:10,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:26:10,817 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 02:26:10,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:26:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-28 02:26:11,001 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:26:11,153 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-28 02:26:11,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414702481] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:26:11,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:26:11,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-11-28 02:26:11,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746514481] [2024-11-28 02:26:11,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:26:11,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 02:26:11,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:26:11,154 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 02:26:11,155 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2024-11-28 02:26:11,155 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:11,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:26:11,391 INFO L93 Difference]: Finished difference Result 160 states and 173 transitions. [2024-11-28 02:26:11,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 02:26:11,391 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 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 57 [2024-11-28 02:26:11,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:26:11,392 INFO L225 Difference]: With dead ends: 160 [2024-11-28 02:26:11,392 INFO L226 Difference]: Without dead ends: 78 [2024-11-28 02:26:11,394 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 98 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2024-11-28 02:26:11,395 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 28 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:26:11,395 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 47 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:26:11,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-28 02:26:11,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2024-11-28 02:26:11,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0921052631578947) internal successors, (83), 76 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:11,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2024-11-28 02:26:11,407 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 57 [2024-11-28 02:26:11,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:26:11,407 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2024-11-28 02:26:11,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:11,408 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2024-11-28 02:26:11,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-28 02:26:11,408 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:26:11,408 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:26:11,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 02:26:11,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 02:26:11,609 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:26:11,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:26:11,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1445849542, now seen corresponding path program 14 times [2024-11-28 02:26:11,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:26:11,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490109893] [2024-11-28 02:26:11,610 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:26:11,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:26:11,625 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:26:11,625 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:11,803 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-28 02:26:11,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:26:11,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490109893] [2024-11-28 02:26:11,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490109893] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:26:11,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033985017] [2024-11-28 02:26:11,804 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:26:11,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:11,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:26:11,806 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:26:11,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 02:26:11,897 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:26:11,897 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:11,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-28 02:26:11,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:26:12,056 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-28 02:26:12,056 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:26:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-28 02:26:12,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033985017] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:26:12,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:26:12,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-11-28 02:26:12,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150094914] [2024-11-28 02:26:12,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:26:12,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 02:26:12,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:26:12,181 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 02:26:12,181 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2024-11-28 02:26:12,182 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:12,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:26:12,399 INFO L93 Difference]: Finished difference Result 111 states and 119 transitions. [2024-11-28 02:26:12,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 02:26:12,399 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 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 59 [2024-11-28 02:26:12,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:26:12,400 INFO L225 Difference]: With dead ends: 111 [2024-11-28 02:26:12,400 INFO L226 Difference]: Without dead ends: 70 [2024-11-28 02:26:12,401 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 101 SyntacticMatches, 10 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2024-11-28 02:26:12,401 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 77 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:26:12,402 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 30 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:26:12,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-28 02:26:12,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2024-11-28 02:26:12,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:12,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2024-11-28 02:26:12,411 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 59 [2024-11-28 02:26:12,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:26:12,411 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2024-11-28 02:26:12,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:12,412 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2024-11-28 02:26:12,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-11-28 02:26:12,412 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:26:12,412 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:26:12,422 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 02:26:12,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 02:26:12,613 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:26:12,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:26:12,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1673077094, now seen corresponding path program 15 times [2024-11-28 02:26:12,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:26:12,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033785626] [2024-11-28 02:26:12,613 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:26:12,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:26:12,689 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-28 02:26:12,690 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:15,626 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 9 proven. 100 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 02:26:15,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:26:15,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033785626] [2024-11-28 02:26:15,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033785626] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:26:15,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894309515] [2024-11-28 02:26:15,626 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:26:15,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:15,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:26:15,631 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:26:15,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 02:26:15,749 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-28 02:26:15,749 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:15,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-11-28 02:26:15,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:26:15,812 INFO L378 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 19 treesize of output 1 [2024-11-28 02:26:17,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:26:17,818 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:26:17,818 INFO L378 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 33 [2024-11-28 02:26:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 9 proven. 100 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 02:26:17,980 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:26:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 02:26:21,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894309515] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:26:21,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:26:21,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 37, 39] total 84 [2024-11-28 02:26:21,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514237439] [2024-11-28 02:26:21,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:26:21,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-11-28 02:26:21,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:26:21,365 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-11-28 02:26:21,368 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=6306, Unknown=0, NotChecked=0, Total=6972 [2024-11-28 02:26:21,368 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 84 states, 84 states have (on average 1.7619047619047619) internal successors, (148), 84 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:30,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:26:30,912 INFO L93 Difference]: Finished difference Result 160 states and 179 transitions. [2024-11-28 02:26:30,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-11-28 02:26:30,913 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.7619047619047619) internal successors, (148), 84 states have internal predecessors, (148), 0 states have call successors, (0), 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 65 [2024-11-28 02:26:30,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:26:30,914 INFO L225 Difference]: With dead ends: 160 [2024-11-28 02:26:30,915 INFO L226 Difference]: Without dead ends: 154 [2024-11-28 02:26:30,918 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6223 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=1958, Invalid=18922, Unknown=0, NotChecked=0, Total=20880 [2024-11-28 02:26:30,918 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 92 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 2295 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 2473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 2295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:26:30,919 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 118 Invalid, 2473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 2295 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-28 02:26:30,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-11-28 02:26:30,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 128. [2024-11-28 02:26:30,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.110236220472441) internal successors, (141), 127 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:30,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 141 transitions. [2024-11-28 02:26:30,949 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 141 transitions. Word has length 65 [2024-11-28 02:26:30,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:26:30,949 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 141 transitions. [2024-11-28 02:26:30,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.7619047619047619) internal successors, (148), 84 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:30,950 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 141 transitions. [2024-11-28 02:26:30,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-28 02:26:30,950 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:26:30,951 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:26:30,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 02:26:31,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 02:26:31,151 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:26:31,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:26:31,152 INFO L85 PathProgramCache]: Analyzing trace with hash 382760074, now seen corresponding path program 16 times [2024-11-28 02:26:31,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:26:31,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335829023] [2024-11-28 02:26:31,152 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:26:31,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:26:31,170 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:26:31,170 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:31,389 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-11-28 02:26:31,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:26:31,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335829023] [2024-11-28 02:26:31,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335829023] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:26:31,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303318025] [2024-11-28 02:26:31,390 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:26:31,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:31,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:26:31,393 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:26:31,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 02:26:31,500 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:26:31,500 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:31,502 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 02:26:31,504 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:26:31,681 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-11-28 02:26:31,681 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:26:31,821 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-11-28 02:26:31,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303318025] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:26:31,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:26:31,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2024-11-28 02:26:31,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513962721] [2024-11-28 02:26:31,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:26:31,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 02:26:31,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:26:31,823 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 02:26:31,823 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2024-11-28 02:26:31,824 INFO L87 Difference]: Start difference. First operand 128 states and 141 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:32,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:26:32,320 INFO L93 Difference]: Finished difference Result 176 states and 193 transitions. [2024-11-28 02:26:32,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 02:26:32,320 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2024-11-28 02:26:32,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:26:32,322 INFO L225 Difference]: With dead ends: 176 [2024-11-28 02:26:32,322 INFO L226 Difference]: Without dead ends: 145 [2024-11-28 02:26:32,322 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 115 SyntacticMatches, 13 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=279, Invalid=843, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 02:26:32,323 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 87 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:26:32,323 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 39 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:26:32,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-11-28 02:26:32,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 109. [2024-11-28 02:26:32,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0740740740740742) internal successors, (116), 108 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:32,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2024-11-28 02:26:32,344 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 67 [2024-11-28 02:26:32,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:26:32,344 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2024-11-28 02:26:32,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 21 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:32,344 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2024-11-28 02:26:32,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-28 02:26:32,345 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:26:32,345 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:26:32,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 02:26:32,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:32,545 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:26:32,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:26:32,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1678205714, now seen corresponding path program 17 times [2024-11-28 02:26:32,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:26:32,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301178582] [2024-11-28 02:26:32,546 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:26:32,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:26:32,582 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-28 02:26:32,582 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:32,793 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2024-11-28 02:26:32,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:26:32,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301178582] [2024-11-28 02:26:32,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301178582] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:26:32,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676053793] [2024-11-28 02:26:32,794 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:26:32,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:32,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:26:32,796 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:26:32,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 02:26:33,008 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-28 02:26:33,008 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:33,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 02:26:33,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:26:33,190 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2024-11-28 02:26:33,190 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:26:33,300 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2024-11-28 02:26:33,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676053793] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:26:33,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:26:33,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2024-11-28 02:26:33,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642790669] [2024-11-28 02:26:33,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:26:33,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 02:26:33,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:26:33,302 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 02:26:33,302 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2024-11-28 02:26:33,302 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:33,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:26:33,576 INFO L93 Difference]: Finished difference Result 148 states and 157 transitions. [2024-11-28 02:26:33,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 02:26:33,576 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 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 69 [2024-11-28 02:26:33,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:26:33,577 INFO L225 Difference]: With dead ends: 148 [2024-11-28 02:26:33,577 INFO L226 Difference]: Without dead ends: 78 [2024-11-28 02:26:33,577 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 120 SyntacticMatches, 12 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2024-11-28 02:26:33,578 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 91 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:26:33,578 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 44 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:26:33,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-28 02:26:33,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2024-11-28 02:26:33,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0684931506849316) internal successors, (78), 73 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:33,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2024-11-28 02:26:33,591 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 69 [2024-11-28 02:26:33,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:26:33,591 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2024-11-28 02:26:33,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 21 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:33,592 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2024-11-28 02:26:33,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-28 02:26:33,592 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:26:33,592 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:26:33,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 02:26:33,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:33,793 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:26:33,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:26:33,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1336708982, now seen corresponding path program 18 times [2024-11-28 02:26:33,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:26:33,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876423651] [2024-11-28 02:26:33,793 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:26:33,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:26:33,849 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-28 02:26:33,850 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:34,110 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-11-28 02:26:34,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:26:34,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876423651] [2024-11-28 02:26:34,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876423651] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:26:34,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444538945] [2024-11-28 02:26:34,111 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:26:34,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:34,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:26:34,114 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:26:34,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 02:26:34,258 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-28 02:26:34,258 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:34,262 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-28 02:26:34,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:26:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-11-28 02:26:34,555 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:26:34,800 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-11-28 02:26:34,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444538945] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:26:34,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:26:34,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-11-28 02:26:34,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319540699] [2024-11-28 02:26:34,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:26:34,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 02:26:34,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:26:34,802 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 02:26:34,802 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2024-11-28 02:26:34,802 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:34,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:26:34,990 INFO L93 Difference]: Finished difference Result 137 states and 145 transitions. [2024-11-28 02:26:34,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-28 02:26:34,991 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2024-11-28 02:26:34,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:26:34,992 INFO L225 Difference]: With dead ends: 137 [2024-11-28 02:26:34,992 INFO L226 Difference]: Without dead ends: 77 [2024-11-28 02:26:34,992 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 127 SyntacticMatches, 11 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2024-11-28 02:26:34,993 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 9 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:26:34,993 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 74 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:26:34,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-28 02:26:35,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2024-11-28 02:26:35,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 75 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:35,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2024-11-28 02:26:35,017 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 73 [2024-11-28 02:26:35,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:26:35,017 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2024-11-28 02:26:35,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:35,017 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2024-11-28 02:26:35,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-11-28 02:26:35,018 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:26:35,018 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:26:35,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 02:26:35,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-28 02:26:35,219 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:26:35,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:26:35,221 INFO L85 PathProgramCache]: Analyzing trace with hash 63280474, now seen corresponding path program 19 times [2024-11-28 02:26:35,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:26:35,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814638134] [2024-11-28 02:26:35,221 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:26:35,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:26:35,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:26:42,643 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:26:42,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:26:42,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814638134] [2024-11-28 02:26:42,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814638134] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:26:42,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195396573] [2024-11-28 02:26:42,643 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:26:42,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:42,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:26:42,646 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:26:42,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 02:26:42,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:26:42,777 WARN L254 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-11-28 02:26:42,780 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:26:42,933 INFO L378 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 1 [2024-11-28 02:26:43,753 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:26:43,753 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:26:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-28 02:26:45,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195396573] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:26:45,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:26:45,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 24, 17] total 61 [2024-11-28 02:26:45,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907525099] [2024-11-28 02:26:45,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:26:45,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-28 02:26:45,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:26:45,172 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-28 02:26:45,173 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=3433, Unknown=0, NotChecked=0, Total=3660 [2024-11-28 02:26:45,173 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 61 states, 61 states have (on average 2.9508196721311477) internal successors, (180), 61 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:48,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:26:48,519 INFO L93 Difference]: Finished difference Result 129 states and 136 transitions. [2024-11-28 02:26:48,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 02:26:48,520 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.9508196721311477) internal successors, (180), 61 states have internal predecessors, (180), 0 states have call successors, (0), 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 75 [2024-11-28 02:26:48,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:26:48,521 INFO L225 Difference]: With dead ends: 129 [2024-11-28 02:26:48,521 INFO L226 Difference]: Without dead ends: 125 [2024-11-28 02:26:48,523 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=444, Invalid=5876, Unknown=0, NotChecked=0, Total=6320 [2024-11-28 02:26:48,525 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 95 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 2597 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 2678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-11-28 02:26:48,526 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 149 Invalid, 2678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2597 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-11-28 02:26:48,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-28 02:26:48,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 109. [2024-11-28 02:26:48,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0740740740740742) internal successors, (116), 108 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:48,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2024-11-28 02:26:48,551 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 75 [2024-11-28 02:26:48,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:26:48,551 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2024-11-28 02:26:48,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.9508196721311477) internal successors, (180), 61 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:48,552 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2024-11-28 02:26:48,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-28 02:26:48,552 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:26:48,552 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:26:48,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-28 02:26:48,753 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:48,753 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:26:48,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:26:48,753 INFO L85 PathProgramCache]: Analyzing trace with hash 391093118, now seen corresponding path program 20 times [2024-11-28 02:26:48,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:26:48,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184882675] [2024-11-28 02:26:48,754 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:26:48,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:26:48,778 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:26:48,778 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:49,077 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 38 proven. 47 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-11-28 02:26:49,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:26:49,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184882675] [2024-11-28 02:26:49,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184882675] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:26:49,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140452558] [2024-11-28 02:26:49,078 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:26:49,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:49,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:26:49,081 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:26:49,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 02:26:49,214 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:26:49,215 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:49,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 02:26:49,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:26:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-11-28 02:26:49,488 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:26:49,691 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-11-28 02:26:49,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140452558] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:26:49,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:26:49,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2024-11-28 02:26:49,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908582578] [2024-11-28 02:26:49,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:26:49,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 02:26:49,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:26:49,695 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 02:26:49,696 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2024-11-28 02:26:49,696 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:50,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:26:50,217 INFO L93 Difference]: Finished difference Result 216 states and 230 transitions. [2024-11-28 02:26:50,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 02:26:50,218 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 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 77 [2024-11-28 02:26:50,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:26:50,220 INFO L225 Difference]: With dead ends: 216 [2024-11-28 02:26:50,220 INFO L226 Difference]: Without dead ends: 112 [2024-11-28 02:26:50,221 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 132 SyntacticMatches, 13 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2024-11-28 02:26:50,221 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 28 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:26:50,222 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 62 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:26:50,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-11-28 02:26:50,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2024-11-28 02:26:50,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0727272727272728) internal successors, (118), 110 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:50,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 118 transitions. [2024-11-28 02:26:50,266 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 118 transitions. Word has length 77 [2024-11-28 02:26:50,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:26:50,267 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 118 transitions. [2024-11-28 02:26:50,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:50,267 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 118 transitions. [2024-11-28 02:26:50,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-28 02:26:50,268 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:26:50,268 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:26:50,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-28 02:26:50,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:50,469 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:26:50,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:26:50,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1777012578, now seen corresponding path program 21 times [2024-11-28 02:26:50,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:26:50,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347118885] [2024-11-28 02:26:50,470 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:26:50,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:26:50,578 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-28 02:26:50,578 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-11-28 02:26:50,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:26:50,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347118885] [2024-11-28 02:26:50,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347118885] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:26:50,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778038961] [2024-11-28 02:26:50,917 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:26:50,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:50,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:26:50,919 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:26:50,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 02:26:51,093 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-28 02:26:51,093 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:51,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-28 02:26:51,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:26:51,410 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-11-28 02:26:51,410 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:26:51,712 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-11-28 02:26:51,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778038961] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:26:51,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:26:51,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2024-11-28 02:26:51,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204448407] [2024-11-28 02:26:51,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:26:51,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 02:26:51,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:26:51,714 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 02:26:51,715 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2024-11-28 02:26:51,715 INFO L87 Difference]: Start difference. First operand 111 states and 118 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:52,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:26:52,019 INFO L93 Difference]: Finished difference Result 155 states and 167 transitions. [2024-11-28 02:26:52,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 02:26:52,019 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 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 79 [2024-11-28 02:26:52,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:26:52,020 INFO L225 Difference]: With dead ends: 155 [2024-11-28 02:26:52,020 INFO L226 Difference]: Without dead ends: 90 [2024-11-28 02:26:52,021 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 135 SyntacticMatches, 14 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2024-11-28 02:26:52,021 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 76 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:26:52,021 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 36 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:26:52,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-28 02:26:52,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2024-11-28 02:26:52,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0588235294117647) internal successors, (90), 85 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:52,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2024-11-28 02:26:52,043 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 79 [2024-11-28 02:26:52,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:26:52,043 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2024-11-28 02:26:52,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:26:52,043 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2024-11-28 02:26:52,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-28 02:26:52,044 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:26:52,044 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:26:52,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-28 02:26:52,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:52,248 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:26:52,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:26:52,248 INFO L85 PathProgramCache]: Analyzing trace with hash 466806862, now seen corresponding path program 22 times [2024-11-28 02:26:52,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:26:52,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481494219] [2024-11-28 02:26:52,248 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:26:52,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:26:52,294 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:26:52,294 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-28 02:26:57,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:26:57,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481494219] [2024-11-28 02:26:57,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481494219] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:26:57,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009246281] [2024-11-28 02:26:57,764 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:26:57,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:26:57,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:26:57,766 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:26:57,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 02:26:57,907 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:26:57,907 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:26:57,910 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 131 conjuncts are in the unsatisfiable core [2024-11-28 02:26:57,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:27:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 241 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 02:27:00,212 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:27:02,066 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:27:02,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 120 treesize of output 453 [2024-11-28 02:27:07,334 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-28 02:27:07,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009246281] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:27:07,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:27:07,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 25, 20] total 67 [2024-11-28 02:27:07,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563645944] [2024-11-28 02:27:07,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:27:07,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-28 02:27:07,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:27:07,339 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-28 02:27:07,341 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=4160, Unknown=0, NotChecked=0, Total=4422 [2024-11-28 02:27:07,342 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 67 states, 67 states have (on average 2.955223880597015) internal successors, (198), 67 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:27:11,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:27:11,939 INFO L93 Difference]: Finished difference Result 144 states and 151 transitions. [2024-11-28 02:27:11,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-28 02:27:11,940 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.955223880597015) internal successors, (198), 67 states have internal predecessors, (198), 0 states have call successors, (0), 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 85 [2024-11-28 02:27:11,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:27:11,941 INFO L225 Difference]: With dead ends: 144 [2024-11-28 02:27:11,941 INFO L226 Difference]: Without dead ends: 140 [2024-11-28 02:27:11,942 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2020 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=532, Invalid=7658, Unknown=0, NotChecked=0, Total=8190 [2024-11-28 02:27:11,943 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 64 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 2583 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 2649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:27:11,943 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 136 Invalid, 2649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2583 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-28 02:27:11,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-28 02:27:11,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 123. [2024-11-28 02:27:11,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0655737704918034) internal successors, (130), 122 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:27:11,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 130 transitions. [2024-11-28 02:27:11,973 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 130 transitions. Word has length 85 [2024-11-28 02:27:11,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:27:11,974 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 130 transitions. [2024-11-28 02:27:11,974 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.955223880597015) internal successors, (198), 67 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:27:11,974 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 130 transitions. [2024-11-28 02:27:11,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-28 02:27:11,975 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:27:11,975 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:27:11,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 02:27:12,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-28 02:27:12,176 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:27:12,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:27:12,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1879318158, now seen corresponding path program 23 times [2024-11-28 02:27:12,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:27:12,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662559313] [2024-11-28 02:27:12,176 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:27:12,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:27:12,227 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-11-28 02:27:12,227 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:27:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-11-28 02:27:12,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:27:12,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662559313] [2024-11-28 02:27:12,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662559313] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:27:12,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185371735] [2024-11-28 02:27:12,616 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:27:12,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:12,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:27:12,619 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:27:12,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 02:27:13,120 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-11-28 02:27:13,120 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:27:13,124 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 02:27:13,126 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:27:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-11-28 02:27:13,429 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:27:13,729 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-11-28 02:27:13,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185371735] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:27:13,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:27:13,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 27 [2024-11-28 02:27:13,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666166449] [2024-11-28 02:27:13,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:27:13,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 02:27:13,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:27:13,731 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 02:27:13,732 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2024-11-28 02:27:13,732 INFO L87 Difference]: Start difference. First operand 123 states and 130 transitions. Second operand has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:27:14,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:27:14,502 INFO L93 Difference]: Finished difference Result 181 states and 192 transitions. [2024-11-28 02:27:14,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 02:27:14,503 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 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 87 [2024-11-28 02:27:14,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:27:14,504 INFO L225 Difference]: With dead ends: 181 [2024-11-28 02:27:14,505 INFO L226 Difference]: Without dead ends: 145 [2024-11-28 02:27:14,505 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 149 SyntacticMatches, 17 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=449, Invalid=1443, Unknown=0, NotChecked=0, Total=1892 [2024-11-28 02:27:14,506 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 92 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:27:14,506 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 39 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 02:27:14,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-11-28 02:27:14,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 111. [2024-11-28 02:27:14,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0636363636363637) internal successors, (117), 110 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:27:14,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 117 transitions. [2024-11-28 02:27:14,559 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 117 transitions. Word has length 87 [2024-11-28 02:27:14,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:27:14,559 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 117 transitions. [2024-11-28 02:27:14,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:27:14,560 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 117 transitions. [2024-11-28 02:27:14,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-28 02:27:14,561 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:27:14,561 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:27:14,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-28 02:27:14,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:14,765 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:27:14,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:27:14,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1863572786, now seen corresponding path program 24 times [2024-11-28 02:27:14,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:27:14,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798825015] [2024-11-28 02:27:14,766 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:27:14,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:27:14,840 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-28 02:27:14,841 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:27:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-11-28 02:27:15,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:27:15,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798825015] [2024-11-28 02:27:15,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798825015] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:27:15,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313228985] [2024-11-28 02:27:15,249 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:27:15,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:15,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:27:15,252 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:27:15,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 02:27:15,510 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-28 02:27:15,510 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:27:15,513 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 02:27:15,515 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:27:15,917 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-11-28 02:27:15,917 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:27:16,184 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2024-11-28 02:27:16,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313228985] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:27:16,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:27:16,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2024-11-28 02:27:16,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915916564] [2024-11-28 02:27:16,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:27:16,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 02:27:16,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:27:16,186 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 02:27:16,186 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2024-11-28 02:27:16,186 INFO L87 Difference]: Start difference. First operand 111 states and 117 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:27:16,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:27:16,631 INFO L93 Difference]: Finished difference Result 238 states and 251 transitions. [2024-11-28 02:27:16,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 02:27:16,632 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 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 87 [2024-11-28 02:27:16,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:27:16,633 INFO L225 Difference]: With dead ends: 238 [2024-11-28 02:27:16,633 INFO L226 Difference]: Without dead ends: 114 [2024-11-28 02:27:16,633 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 149 SyntacticMatches, 15 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2024-11-28 02:27:16,634 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:27:16,634 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 49 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:27:16,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-11-28 02:27:16,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2024-11-28 02:27:16,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0625) internal successors, (119), 112 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:27:16,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 119 transitions. [2024-11-28 02:27:16,670 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 119 transitions. Word has length 87 [2024-11-28 02:27:16,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:27:16,670 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 119 transitions. [2024-11-28 02:27:16,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:27:16,670 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 119 transitions. [2024-11-28 02:27:16,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-28 02:27:16,672 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:27:16,672 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:27:16,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 02:27:16,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-28 02:27:16,876 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:27:16,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:27:16,876 INFO L85 PathProgramCache]: Analyzing trace with hash -739589098, now seen corresponding path program 25 times [2024-11-28 02:27:16,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:27:16,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883296105] [2024-11-28 02:27:16,877 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:27:16,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:27:16,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:27:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-11-28 02:27:17,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:27:17,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883296105] [2024-11-28 02:27:17,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883296105] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:27:17,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439411369] [2024-11-28 02:27:17,279 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:27:17,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:17,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:27:17,284 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:27:17,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 02:27:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:27:17,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-28 02:27:17,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:27:17,734 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-11-28 02:27:17,735 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:27:17,964 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-11-28 02:27:17,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439411369] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:27:17,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:27:17,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2024-11-28 02:27:17,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985129421] [2024-11-28 02:27:17,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:27:17,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 02:27:17,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:27:17,965 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 02:27:17,965 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2024-11-28 02:27:17,966 INFO L87 Difference]: Start difference. First operand 113 states and 119 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:27:18,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:27:18,359 INFO L93 Difference]: Finished difference Result 159 states and 167 transitions. [2024-11-28 02:27:18,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 02:27:18,359 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 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 89 [2024-11-28 02:27:18,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:27:18,361 INFO L225 Difference]: With dead ends: 159 [2024-11-28 02:27:18,361 INFO L226 Difference]: Without dead ends: 100 [2024-11-28 02:27:18,361 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 152 SyntacticMatches, 16 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=225, Invalid=705, Unknown=0, NotChecked=0, Total=930 [2024-11-28 02:27:18,361 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 122 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:27:18,362 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 57 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:27:18,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-11-28 02:27:18,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2024-11-28 02:27:18,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 95 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:27:18,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2024-11-28 02:27:18,395 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 89 [2024-11-28 02:27:18,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:27:18,395 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2024-11-28 02:27:18,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:27:18,395 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2024-11-28 02:27:18,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-28 02:27:18,396 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:27:18,396 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:27:18,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-28 02:27:18,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-28 02:27:18,596 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:27:18,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:27:18,597 INFO L85 PathProgramCache]: Analyzing trace with hash 883841602, now seen corresponding path program 26 times [2024-11-28 02:27:18,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:27:18,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797498985] [2024-11-28 02:27:18,597 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:27:18,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:27:18,678 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:27:18,678 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:27:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:27:25,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:27:25,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797498985] [2024-11-28 02:27:25,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797498985] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:27:25,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114702971] [2024-11-28 02:27:25,122 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:27:25,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:25,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:27:25,124 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:27:25,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 02:27:25,274 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:27:25,274 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:27:25,278 WARN L254 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 153 conjuncts are in the unsatisfiable core [2024-11-28 02:27:25,282 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:27:25,402 INFO L378 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 1 [2024-11-28 02:27:26,196 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:27:26,196 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:27:28,396 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-28 02:27:28,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114702971] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:27:28,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:27:28,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 21] total 50 [2024-11-28 02:27:28,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229981835] [2024-11-28 02:27:28,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:27:28,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-28 02:27:28,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:27:28,398 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-28 02:27:28,399 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2310, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 02:27:28,399 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 50 states, 50 states have (on average 3.68) internal successors, (184), 50 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:27:31,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:27:31,347 INFO L93 Difference]: Finished difference Result 161 states and 168 transitions. [2024-11-28 02:27:31,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 02:27:31,347 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.68) internal successors, (184), 50 states have internal predecessors, (184), 0 states have call successors, (0), 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 95 [2024-11-28 02:27:31,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:27:31,349 INFO L225 Difference]: With dead ends: 161 [2024-11-28 02:27:31,349 INFO L226 Difference]: Without dead ends: 157 [2024-11-28 02:27:31,350 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=140, Invalid=2310, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 02:27:31,351 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 2979 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 2980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-11-28 02:27:31,351 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 231 Invalid, 2980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2979 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-11-28 02:27:31,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-28 02:27:31,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 137. [2024-11-28 02:27:31,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0588235294117647) internal successors, (144), 136 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:27:31,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 144 transitions. [2024-11-28 02:27:31,416 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 144 transitions. Word has length 95 [2024-11-28 02:27:31,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:27:31,416 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 144 transitions. [2024-11-28 02:27:31,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.68) internal successors, (184), 50 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:27:31,416 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 144 transitions. [2024-11-28 02:27:31,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-28 02:27:31,417 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:27:31,417 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:27:31,428 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-28 02:27:31,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-28 02:27:31,618 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:27:31,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:27:31,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1062372966, now seen corresponding path program 27 times [2024-11-28 02:27:31,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:27:31,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637337655] [2024-11-28 02:27:31,619 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:27:31,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:27:31,731 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-28 02:27:31,731 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:27:32,096 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 49 proven. 96 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-11-28 02:27:32,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:27:32,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637337655] [2024-11-28 02:27:32,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637337655] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:27:32,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579100124] [2024-11-28 02:27:32,096 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:27:32,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:32,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:27:32,099 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:27:32,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 02:27:32,370 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-28 02:27:32,370 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:27:32,373 INFO L256 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 02:27:32,375 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:27:32,726 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 79 proven. 81 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2024-11-28 02:27:32,726 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:27:33,203 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-11-28 02:27:33,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579100124] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:27:33,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:27:33,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23, 21] total 43 [2024-11-28 02:27:33,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694023762] [2024-11-28 02:27:33,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:27:33,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-28 02:27:33,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:27:33,205 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-28 02:27:33,205 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2024-11-28 02:27:33,205 INFO L87 Difference]: Start difference. First operand 137 states and 144 transitions. Second operand has 43 states, 43 states have (on average 2.3255813953488373) internal successors, (100), 43 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:27:34,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:27:34,378 INFO L93 Difference]: Finished difference Result 201 states and 212 transitions. [2024-11-28 02:27:34,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-28 02:27:34,378 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.3255813953488373) internal successors, (100), 43 states have internal predecessors, (100), 0 states have call successors, (0), 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 97 [2024-11-28 02:27:34,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:27:34,380 INFO L225 Difference]: With dead ends: 201 [2024-11-28 02:27:34,380 INFO L226 Difference]: Without dead ends: 161 [2024-11-28 02:27:34,381 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 163 SyntacticMatches, 9 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=868, Invalid=2792, Unknown=0, NotChecked=0, Total=3660 [2024-11-28 02:27:34,382 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 133 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 02:27:34,383 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 29 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 02:27:34,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-11-28 02:27:34,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2024-11-28 02:27:34,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0573770491803278) internal successors, (129), 122 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:27:34,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 129 transitions. [2024-11-28 02:27:34,432 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 129 transitions. Word has length 97 [2024-11-28 02:27:34,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:27:34,432 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 129 transitions. [2024-11-28 02:27:34,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.3255813953488373) internal successors, (100), 43 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:27:34,432 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 129 transitions. [2024-11-28 02:27:34,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-11-28 02:27:34,433 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:27:34,433 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:27:34,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-28 02:27:34,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:34,634 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:27:34,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:27:34,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1092967898, now seen corresponding path program 28 times [2024-11-28 02:27:34,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:27:34,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42751407] [2024-11-28 02:27:34,634 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:27:34,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:27:34,649 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:27:34,650 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:27:34,899 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-11-28 02:27:34,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:27:34,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42751407] [2024-11-28 02:27:34,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42751407] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:27:34,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837749720] [2024-11-28 02:27:34,899 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:27:34,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:34,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:27:34,902 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:27:34,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 02:27:35,028 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:27:35,028 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:27:35,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 02:27:35,031 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:27:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-11-28 02:27:35,421 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:27:35,668 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-11-28 02:27:35,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837749720] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:27:35,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:27:35,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 30 [2024-11-28 02:27:35,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456960655] [2024-11-28 02:27:35,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:27:35,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 02:27:35,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:27:35,670 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 02:27:35,670 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2024-11-28 02:27:35,670 INFO L87 Difference]: Start difference. First operand 123 states and 129 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:27:36,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:27:36,208 INFO L93 Difference]: Finished difference Result 208 states and 217 transitions. [2024-11-28 02:27:36,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 02:27:36,208 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 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 97 [2024-11-28 02:27:36,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:27:36,209 INFO L225 Difference]: With dead ends: 208 [2024-11-28 02:27:36,209 INFO L226 Difference]: Without dead ends: 108 [2024-11-28 02:27:36,210 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 167 SyntacticMatches, 18 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=381, Invalid=1101, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 02:27:36,211 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 210 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:27:36,211 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 40 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:27:36,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-28 02:27:36,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2024-11-28 02:27:36,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:27:36,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2024-11-28 02:27:36,247 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 97 [2024-11-28 02:27:36,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:27:36,248 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2024-11-28 02:27:36,248 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:27:36,248 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2024-11-28 02:27:36,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-11-28 02:27:36,249 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:27:36,249 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:27:36,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-28 02:27:36,449 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:36,450 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:27:36,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:27:36,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1275032494, now seen corresponding path program 29 times [2024-11-28 02:27:36,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:27:36,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750851131] [2024-11-28 02:27:36,450 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:27:36,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:27:36,502 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-11-28 02:27:36,502 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:27:36,914 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2024-11-28 02:27:36,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:27:36,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750851131] [2024-11-28 02:27:36,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750851131] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:27:36,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733203050] [2024-11-28 02:27:36,914 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:27:36,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:36,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:27:36,916 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:27:36,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 02:27:37,627 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-11-28 02:27:37,627 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:27:37,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 02:27:37,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:27:38,030 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2024-11-28 02:27:38,030 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:27:38,365 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2024-11-28 02:27:38,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733203050] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:27:38,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:27:38,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 30 [2024-11-28 02:27:38,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391390526] [2024-11-28 02:27:38,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:27:38,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 02:27:38,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:27:38,367 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 02:27:38,367 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2024-11-28 02:27:38,367 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:27:38,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:27:38,714 INFO L93 Difference]: Finished difference Result 191 states and 199 transitions. [2024-11-28 02:27:38,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 02:27:38,716 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 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 103 [2024-11-28 02:27:38,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:27:38,717 INFO L225 Difference]: With dead ends: 191 [2024-11-28 02:27:38,717 INFO L226 Difference]: Without dead ends: 107 [2024-11-28 02:27:38,718 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 179 SyntacticMatches, 18 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2024-11-28 02:27:38,719 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:27:38,719 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 100 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:27:38,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-28 02:27:38,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2024-11-28 02:27:38,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.0476190476190477) internal successors, (110), 105 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:27:38,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2024-11-28 02:27:38,796 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 103 [2024-11-28 02:27:38,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:27:38,796 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2024-11-28 02:27:38,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:27:38,796 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2024-11-28 02:27:38,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-11-28 02:27:38,797 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:27:38,797 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:27:38,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-28 02:27:38,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-28 02:27:38,998 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:27:38,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:27:38,999 INFO L85 PathProgramCache]: Analyzing trace with hash 563424054, now seen corresponding path program 30 times [2024-11-28 02:27:38,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:27:38,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978664029] [2024-11-28 02:27:38,999 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:27:38,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:27:39,121 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-11-28 02:27:39,121 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:27:45,635 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-28 02:27:45,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:27:45,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978664029] [2024-11-28 02:27:45,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978664029] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:27:45,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162520702] [2024-11-28 02:27:45,636 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:27:45,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:27:45,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:27:45,638 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:27:45,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 02:27:45,977 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-11-28 02:27:45,977 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:27:45,984 WARN L254 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 177 conjuncts are in the unsatisfiable core [2024-11-28 02:27:45,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:27:48,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:27:48,061 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:27:48,061 INFO L378 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 38 treesize of output 39 [2024-11-28 02:27:48,216 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 5 proven. 396 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 02:27:48,216 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:27:51,907 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:27:51,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 120 treesize of output 453 [2024-11-28 02:28:00,402 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-28 02:28:00,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162520702] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:28:00,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:28:00,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 37, 30] total 75 [2024-11-28 02:28:00,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479570029] [2024-11-28 02:28:00,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:28:00,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-11-28 02:28:00,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:28:00,404 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-11-28 02:28:00,405 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=5253, Unknown=0, NotChecked=0, Total=5550 [2024-11-28 02:28:00,405 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand has 75 states, 75 states have (on average 2.9066666666666667) internal successors, (218), 75 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:28:06,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:28:06,882 INFO L93 Difference]: Finished difference Result 176 states and 183 transitions. [2024-11-28 02:28:06,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-28 02:28:06,883 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.9066666666666667) internal successors, (218), 75 states have internal predecessors, (218), 0 states have call successors, (0), 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 105 [2024-11-28 02:28:06,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:28:06,884 INFO L225 Difference]: With dead ends: 176 [2024-11-28 02:28:06,884 INFO L226 Difference]: Without dead ends: 172 [2024-11-28 02:28:06,885 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 187 SyntacticMatches, 4 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2632 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=624, Invalid=10296, Unknown=0, NotChecked=0, Total=10920 [2024-11-28 02:28:06,886 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 4225 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 4337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 4225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-28 02:28:06,886 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 160 Invalid, 4337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 4225 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-28 02:28:06,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-11-28 02:28:06,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 151. [2024-11-28 02:28:06,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0533333333333332) internal successors, (158), 150 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:28:06,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 158 transitions. [2024-11-28 02:28:06,935 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 158 transitions. Word has length 105 [2024-11-28 02:28:06,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:28:06,935 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 158 transitions. [2024-11-28 02:28:06,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.9066666666666667) internal successors, (218), 75 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:28:06,935 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 158 transitions. [2024-11-28 02:28:06,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-28 02:28:06,936 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:28:06,936 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:28:06,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-28 02:28:07,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-28 02:28:07,141 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:28:07,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:28:07,141 INFO L85 PathProgramCache]: Analyzing trace with hash -767505830, now seen corresponding path program 31 times [2024-11-28 02:28:07,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:28:07,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225976451] [2024-11-28 02:28:07,141 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:28:07,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:28:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:28:07,460 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 83 proven. 98 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2024-11-28 02:28:07,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:28:07,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225976451] [2024-11-28 02:28:07,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225976451] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:28:07,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055448451] [2024-11-28 02:28:07,460 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:28:07,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:28:07,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:28:07,462 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:28:07,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 02:28:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:28:07,626 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 02:28:07,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:28:07,916 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2024-11-28 02:28:07,917 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:28:08,132 INFO L134 CoverageAnalysis]: Checked inductivity of 424 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2024-11-28 02:28:08,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055448451] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:28:08,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:28:08,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2024-11-28 02:28:08,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433009957] [2024-11-28 02:28:08,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:28:08,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-28 02:28:08,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:28:08,134 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-28 02:28:08,134 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 02:28:08,134 INFO L87 Difference]: Start difference. First operand 151 states and 158 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:28:08,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:28:08,664 INFO L93 Difference]: Finished difference Result 300 states and 314 transitions. [2024-11-28 02:28:08,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 02:28:08,664 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 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 107 [2024-11-28 02:28:08,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:28:08,665 INFO L225 Difference]: With dead ends: 300 [2024-11-28 02:28:08,665 INFO L226 Difference]: Without dead ends: 154 [2024-11-28 02:28:08,666 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 183 SyntacticMatches, 19 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 02:28:08,666 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:28:08,667 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 65 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:28:08,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-11-28 02:28:08,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2024-11-28 02:28:08,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.0526315789473684) internal successors, (160), 152 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:28:08,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 160 transitions. [2024-11-28 02:28:08,734 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 160 transitions. Word has length 107 [2024-11-28 02:28:08,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:28:08,735 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 160 transitions. [2024-11-28 02:28:08,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:28:08,735 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 160 transitions. [2024-11-28 02:28:08,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-11-28 02:28:08,735 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:28:08,735 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:28:08,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-28 02:28:08,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-28 02:28:08,936 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:28:08,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:28:08,937 INFO L85 PathProgramCache]: Analyzing trace with hash 350443326, now seen corresponding path program 32 times [2024-11-28 02:28:08,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:28:08,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118739684] [2024-11-28 02:28:08,937 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:28:08,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:28:08,959 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:28:08,959 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:28:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 64 proven. 117 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2024-11-28 02:28:09,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:28:09,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118739684] [2024-11-28 02:28:09,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118739684] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:28:09,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334240768] [2024-11-28 02:28:09,315 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:28:09,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:28:09,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:28:09,318 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:28:09,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-28 02:28:09,466 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:28:09,466 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:28:09,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-28 02:28:09,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:28:09,745 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2024-11-28 02:28:09,745 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:28:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2024-11-28 02:28:10,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334240768] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:28:10,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:28:10,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2024-11-28 02:28:10,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325055209] [2024-11-28 02:28:10,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:28:10,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-28 02:28:10,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:28:10,014 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-28 02:28:10,014 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=901, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 02:28:10,015 INFO L87 Difference]: Start difference. First operand 153 states and 160 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:28:10,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:28:10,385 INFO L93 Difference]: Finished difference Result 209 states and 221 transitions. [2024-11-28 02:28:10,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 02:28:10,385 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 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 109 [2024-11-28 02:28:10,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:28:10,387 INFO L225 Difference]: With dead ends: 209 [2024-11-28 02:28:10,387 INFO L226 Difference]: Without dead ends: 120 [2024-11-28 02:28:10,387 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 186 SyntacticMatches, 20 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=1015, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 02:28:10,388 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 99 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:28:10,388 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 35 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:28:10,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-11-28 02:28:10,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2024-11-28 02:28:10,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 115 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:28:10,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2024-11-28 02:28:10,418 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 109 [2024-11-28 02:28:10,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:28:10,418 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2024-11-28 02:28:10,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:28:10,418 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2024-11-28 02:28:10,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-11-28 02:28:10,419 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:28:10,419 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:28:10,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-28 02:28:10,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-28 02:28:10,620 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:28:10,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:28:10,620 INFO L85 PathProgramCache]: Analyzing trace with hash 875862826, now seen corresponding path program 33 times [2024-11-28 02:28:10,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:28:10,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878974844] [2024-11-28 02:28:10,620 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:28:10,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:28:10,772 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-28 02:28:10,772 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:28:18,289 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 419 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-28 02:28:18,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:28:18,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878974844] [2024-11-28 02:28:18,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878974844] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:28:18,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564960779] [2024-11-28 02:28:18,290 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:28:18,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:28:18,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:28:18,293 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:28:18,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-28 02:28:18,524 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-28 02:28:18,524 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:28:18,530 WARN L254 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 204 conjuncts are in the unsatisfiable core [2024-11-28 02:28:18,537 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:28:18,965 INFO L378 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 1 [2024-11-28 02:28:19,043 INFO L378 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 1 [2024-11-28 02:28:19,123 INFO L378 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 1 [2024-11-28 02:28:19,202 INFO L378 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 1 [2024-11-28 02:28:19,407 INFO L378 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 1 [2024-11-28 02:28:23,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:28:23,986 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:28:23,986 INFO L378 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 33 [2024-11-28 02:28:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:28:24,163 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:28:28,335 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 419 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2024-11-28 02:28:28,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564960779] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:28:28,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:28:28,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 31] total 109 [2024-11-28 02:28:28,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827497253] [2024-11-28 02:28:28,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:28:28,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2024-11-28 02:28:28,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:28:28,338 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2024-11-28 02:28:28,339 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=816, Invalid=10956, Unknown=0, NotChecked=0, Total=11772 [2024-11-28 02:28:28,339 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand has 109 states, 109 states have (on average 2.7889908256880735) internal successors, (304), 109 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:28:47,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:28:47,496 INFO L93 Difference]: Finished difference Result 344 states and 368 transitions. [2024-11-28 02:28:47,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2024-11-28 02:28:47,497 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.7889908256880735) internal successors, (304), 109 states have internal predecessors, (304), 0 states have call successors, (0), 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 115 [2024-11-28 02:28:47,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:28:47,500 INFO L225 Difference]: With dead ends: 344 [2024-11-28 02:28:47,500 INFO L226 Difference]: Without dead ends: 339 [2024-11-28 02:28:47,502 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 178 SyntacticMatches, 5 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11132 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=2202, Invalid=35628, Unknown=0, NotChecked=0, Total=37830 [2024-11-28 02:28:47,503 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 72 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 8033 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 8197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 8033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:28:47,503 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 231 Invalid, 8197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 8033 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2024-11-28 02:28:47,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2024-11-28 02:28:47,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 254. [2024-11-28 02:28:47,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.075098814229249) internal successors, (272), 253 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:28:47,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 272 transitions. [2024-11-28 02:28:47,609 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 272 transitions. Word has length 115 [2024-11-28 02:28:47,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:28:47,609 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 272 transitions. [2024-11-28 02:28:47,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.7889908256880735) internal successors, (304), 109 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:28:47,610 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 272 transitions. [2024-11-28 02:28:47,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-11-28 02:28:47,610 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:28:47,611 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:28:47,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-28 02:28:47,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-28 02:28:47,811 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:28:47,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:28:47,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1514754766, now seen corresponding path program 34 times [2024-11-28 02:28:47,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:28:47,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029211806] [2024-11-28 02:28:47,812 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:28:47,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:28:47,831 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:28:47,831 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:28:48,180 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2024-11-28 02:28:48,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:28:48,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029211806] [2024-11-28 02:28:48,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029211806] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:28:48,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491187992] [2024-11-28 02:28:48,181 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:28:48,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:28:48,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:28:48,183 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:28:48,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-28 02:28:48,338 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:28:48,339 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:28:48,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 02:28:48,342 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:28:48,611 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2024-11-28 02:28:48,611 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:28:48,894 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2024-11-28 02:28:48,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491187992] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:28:48,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:28:48,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 36 [2024-11-28 02:28:48,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416575783] [2024-11-28 02:28:48,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:28:48,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-28 02:28:48,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:28:48,895 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-28 02:28:48,895 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 02:28:48,896 INFO L87 Difference]: Start difference. First operand 254 states and 272 transitions. Second operand has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 36 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:28:50,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:28:50,214 INFO L93 Difference]: Finished difference Result 454 states and 481 transitions. [2024-11-28 02:28:50,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-28 02:28:50,214 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 36 states have internal predecessors, (85), 0 states have call successors, (0), 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 119 [2024-11-28 02:28:50,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:28:50,216 INFO L225 Difference]: With dead ends: 454 [2024-11-28 02:28:50,216 INFO L226 Difference]: Without dead ends: 374 [2024-11-28 02:28:50,216 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 204 SyntacticMatches, 23 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=779, Invalid=2643, Unknown=0, NotChecked=0, Total=3422 [2024-11-28 02:28:50,217 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 130 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:28:50,217 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 32 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1060 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 02:28:50,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2024-11-28 02:28:50,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 222. [2024-11-28 02:28:50,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.0497737556561086) internal successors, (232), 221 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:28:50,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 232 transitions. [2024-11-28 02:28:50,308 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 232 transitions. Word has length 119 [2024-11-28 02:28:50,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:28:50,308 INFO L471 AbstractCegarLoop]: Abstraction has 222 states and 232 transitions. [2024-11-28 02:28:50,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 36 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:28:50,309 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 232 transitions. [2024-11-28 02:28:50,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-11-28 02:28:50,310 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:28:50,310 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:28:50,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-11-28 02:28:50,510 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-28 02:28:50,510 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:28:50,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:28:50,511 INFO L85 PathProgramCache]: Analyzing trace with hash -2090399502, now seen corresponding path program 35 times [2024-11-28 02:28:50,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:28:50,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271450004] [2024-11-28 02:28:50,511 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:28:50,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:28:50,573 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-11-28 02:28:50,573 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:28:50,931 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2024-11-28 02:28:50,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:28:50,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271450004] [2024-11-28 02:28:50,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271450004] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:28:50,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477201559] [2024-11-28 02:28:50,931 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:28:50,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:28:50,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:28:50,933 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:28:50,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-28 02:28:51,720 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-11-28 02:28:51,720 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:28:51,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 02:28:51,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:28:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2024-11-28 02:28:52,015 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:28:52,304 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2024-11-28 02:28:52,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477201559] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:28:52,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:28:52,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 36 [2024-11-28 02:28:52,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017482203] [2024-11-28 02:28:52,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:28:52,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-28 02:28:52,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:28:52,306 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-28 02:28:52,306 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 02:28:52,306 INFO L87 Difference]: Start difference. First operand 222 states and 232 transitions. Second operand has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 36 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:28:52,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:28:52,860 INFO L93 Difference]: Finished difference Result 358 states and 373 transitions. [2024-11-28 02:28:52,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 02:28:52,861 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 36 states have internal predecessors, (85), 0 states have call successors, (0), 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 119 [2024-11-28 02:28:52,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:28:52,862 INFO L225 Difference]: With dead ends: 358 [2024-11-28 02:28:52,862 INFO L226 Difference]: Without dead ends: 281 [2024-11-28 02:28:52,862 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 204 SyntacticMatches, 23 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=340, Invalid=1066, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 02:28:52,863 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 128 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:28:52,863 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 107 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:28:52,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2024-11-28 02:28:52,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 199. [2024-11-28 02:28:52,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.0454545454545454) internal successors, (207), 198 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:28:52,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 207 transitions. [2024-11-28 02:28:52,940 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 207 transitions. Word has length 119 [2024-11-28 02:28:52,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:28:52,941 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 207 transitions. [2024-11-28 02:28:52,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 36 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:28:52,941 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 207 transitions. [2024-11-28 02:28:52,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-11-28 02:28:52,941 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:28:52,941 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:28:52,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-28 02:28:53,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-28 02:28:53,142 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:28:53,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:28:53,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1599069006, now seen corresponding path program 36 times [2024-11-28 02:28:53,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:28:53,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559619219] [2024-11-28 02:28:53,142 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:28:53,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:28:53,218 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-11-28 02:28:53,218 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:28:53,567 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 102 proven. 119 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2024-11-28 02:28:53,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:28:53,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559619219] [2024-11-28 02:28:53,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559619219] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:28:53,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278487011] [2024-11-28 02:28:53,567 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:28:53,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:28:53,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:28:53,569 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:28:53,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-28 02:28:53,994 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-11-28 02:28:53,995 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:28:53,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 02:28:54,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:28:54,355 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2024-11-28 02:28:54,356 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:28:54,625 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2024-11-28 02:28:54,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278487011] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:28:54,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:28:54,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2024-11-28 02:28:54,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658747279] [2024-11-28 02:28:54,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:28:54,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-28 02:28:54,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:28:54,627 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-28 02:28:54,627 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 02:28:54,627 INFO L87 Difference]: Start difference. First operand 199 states and 207 transitions. Second operand has 38 states, 38 states have (on average 2.3947368421052633) internal successors, (91), 38 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:28:55,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:28:55,221 INFO L93 Difference]: Finished difference Result 272 states and 282 transitions. [2024-11-28 02:28:55,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 02:28:55,222 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3947368421052633) internal successors, (91), 38 states have internal predecessors, (91), 0 states have call successors, (0), 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 119 [2024-11-28 02:28:55,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:28:55,223 INFO L225 Difference]: With dead ends: 272 [2024-11-28 02:28:55,223 INFO L226 Difference]: Without dead ends: 152 [2024-11-28 02:28:55,223 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 204 SyntacticMatches, 21 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2024-11-28 02:28:55,224 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 233 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 02:28:55,224 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 48 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 02:28:55,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-11-28 02:28:55,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 124. [2024-11-28 02:28:55,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.0406504065040652) internal successors, (128), 123 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:28:55,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2024-11-28 02:28:55,299 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 119 [2024-11-28 02:28:55,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:28:55,299 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2024-11-28 02:28:55,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3947368421052633) internal successors, (91), 38 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:28:55,299 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2024-11-28 02:28:55,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-28 02:28:55,300 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:28:55,300 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:28:55,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-11-28 02:28:55,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-28 02:28:55,501 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:28:55,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:28:55,501 INFO L85 PathProgramCache]: Analyzing trace with hash -178936518, now seen corresponding path program 37 times [2024-11-28 02:28:55,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:28:55,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312555100] [2024-11-28 02:28:55,501 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:28:55,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:28:55,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:28:55,875 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 102 proven. 119 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2024-11-28 02:28:55,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:28:55,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312555100] [2024-11-28 02:28:55,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312555100] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:28:55,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803982679] [2024-11-28 02:28:55,876 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:28:55,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:28:55,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:28:55,877 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:28:55,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-28 02:28:56,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:28:56,059 INFO L256 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 02:28:56,061 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:28:56,450 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2024-11-28 02:28:56,451 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:28:56,700 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 121 proven. 100 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2024-11-28 02:28:56,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803982679] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:28:56,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:28:56,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2024-11-28 02:28:56,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463618464] [2024-11-28 02:28:56,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:28:56,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-28 02:28:56,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:28:56,702 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-28 02:28:56,702 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1077, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 02:28:56,702 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand has 38 states, 38 states have (on average 2.3947368421052633) internal successors, (91), 38 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:28:56,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:28:56,938 INFO L93 Difference]: Finished difference Result 227 states and 235 transitions. [2024-11-28 02:28:56,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 02:28:56,938 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3947368421052633) internal successors, (91), 38 states have internal predecessors, (91), 0 states have call successors, (0), 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 123 [2024-11-28 02:28:56,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:28:56,939 INFO L225 Difference]: With dead ends: 227 [2024-11-28 02:28:56,939 INFO L226 Difference]: Without dead ends: 127 [2024-11-28 02:28:56,939 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 212 SyntacticMatches, 21 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=329, Invalid=1077, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 02:28:56,940 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:28:56,940 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 125 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:28:56,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-28 02:28:56,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2024-11-28 02:28:56,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.04) internal successors, (130), 125 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:28:56,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2024-11-28 02:28:56,996 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 123 [2024-11-28 02:28:56,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:28:56,996 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2024-11-28 02:28:56,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3947368421052633) internal successors, (91), 38 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:28:56,996 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2024-11-28 02:28:56,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-28 02:28:56,996 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:28:56,996 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:28:57,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-28 02:28:57,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-28 02:28:57,197 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:28:57,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:28:57,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1890183710, now seen corresponding path program 38 times [2024-11-28 02:28:57,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:28:57,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196086381] [2024-11-28 02:28:57,197 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:28:57,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:28:57,253 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:28:57,253 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:29:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 0 proven. 605 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:29:06,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:29:06,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196086381] [2024-11-28 02:29:06,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196086381] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:29:06,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595949517] [2024-11-28 02:29:06,418 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:29:06,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:29:06,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:29:06,423 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:29:06,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-28 02:29:06,643 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:29:06,644 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:29:06,648 WARN L254 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 210 conjuncts are in the unsatisfiable core [2024-11-28 02:29:06,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:29:06,806 INFO L378 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 1 [2024-11-28 02:29:08,042 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 0 proven. 605 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:29:08,043 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:29:11,965 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-11-28 02:29:11,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595949517] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:29:11,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:29:11,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 39, 27] total 95 [2024-11-28 02:29:11,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002088615] [2024-11-28 02:29:11,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:29:11,966 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2024-11-28 02:29:11,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:29:11,967 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2024-11-28 02:29:11,967 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=8413, Unknown=0, NotChecked=0, Total=8930 [2024-11-28 02:29:11,968 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand has 95 states, 95 states have (on average 3.042105263157895) internal successors, (289), 95 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:29:19,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:29:19,587 INFO L93 Difference]: Finished difference Result 209 states and 216 transitions. [2024-11-28 02:29:19,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-28 02:29:19,588 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.042105263157895) internal successors, (289), 95 states have internal predecessors, (289), 0 states have call successors, (0), 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 125 [2024-11-28 02:29:19,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:29:19,589 INFO L225 Difference]: With dead ends: 209 [2024-11-28 02:29:19,589 INFO L226 Difference]: Without dead ends: 205 [2024-11-28 02:29:19,590 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3413 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=935, Invalid=13585, Unknown=0, NotChecked=0, Total=14520 [2024-11-28 02:29:19,590 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 117 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 5876 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 5978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 5876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-11-28 02:29:19,591 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 182 Invalid, 5978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 5876 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2024-11-28 02:29:19,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-28 02:29:19,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 179. [2024-11-28 02:29:19,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.0449438202247192) internal successors, (186), 178 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:29:19,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 186 transitions. [2024-11-28 02:29:19,694 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 186 transitions. Word has length 125 [2024-11-28 02:29:19,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:29:19,695 INFO L471 AbstractCegarLoop]: Abstraction has 179 states and 186 transitions. [2024-11-28 02:29:19,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.042105263157895) internal successors, (289), 95 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:29:19,695 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 186 transitions. [2024-11-28 02:29:19,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-11-28 02:29:19,696 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:29:19,696 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:29:19,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-11-28 02:29:19,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:29:19,896 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:29:19,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:29:19,897 INFO L85 PathProgramCache]: Analyzing trace with hash 919154498, now seen corresponding path program 39 times [2024-11-28 02:29:19,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:29:19,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448024170] [2024-11-28 02:29:19,897 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:29:19,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:29:20,077 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-28 02:29:20,077 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:29:20,702 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 100 proven. 165 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2024-11-28 02:29:20,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:29:20,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448024170] [2024-11-28 02:29:20,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448024170] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:29:20,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508233771] [2024-11-28 02:29:20,703 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:29:20,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:29:20,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:29:20,705 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:29:20,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-28 02:29:21,088 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-11-28 02:29:21,088 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:29:21,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 02:29:21,094 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:29:21,426 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2024-11-28 02:29:21,427 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:29:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 121 proven. 144 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2024-11-28 02:29:21,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508233771] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:29:21,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:29:21,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2024-11-28 02:29:21,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765047251] [2024-11-28 02:29:21,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:29:21,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-28 02:29:21,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:29:21,825 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-28 02:29:21,825 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 02:29:21,825 INFO L87 Difference]: Start difference. First operand 179 states and 186 transitions. Second operand has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:29:23,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:29:23,171 INFO L93 Difference]: Finished difference Result 261 states and 272 transitions. [2024-11-28 02:29:23,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-28 02:29:23,172 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2024-11-28 02:29:23,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:29:23,173 INFO L225 Difference]: With dead ends: 261 [2024-11-28 02:29:23,174 INFO L226 Difference]: Without dead ends: 209 [2024-11-28 02:29:23,174 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 216 SyntacticMatches, 24 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1697 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=892, Invalid=3268, Unknown=0, NotChecked=0, Total=4160 [2024-11-28 02:29:23,175 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 150 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1570 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 02:29:23,175 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 73 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1570 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 02:29:23,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2024-11-28 02:29:23,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 159. [2024-11-28 02:29:23,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0443037974683544) internal successors, (165), 158 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:29:23,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 165 transitions. [2024-11-28 02:29:23,257 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 165 transitions. Word has length 127 [2024-11-28 02:29:23,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:29:23,258 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 165 transitions. [2024-11-28 02:29:23,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 41 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:29:23,258 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 165 transitions. [2024-11-28 02:29:23,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-11-28 02:29:23,259 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:29:23,259 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:29:23,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-11-28 02:29:23,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:29:23,459 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:29:23,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:29:23,460 INFO L85 PathProgramCache]: Analyzing trace with hash -365843710, now seen corresponding path program 40 times [2024-11-28 02:29:23,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:29:23,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103534930] [2024-11-28 02:29:23,460 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:29:23,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:29:23,480 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:29:23,480 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:29:23,883 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2024-11-28 02:29:23,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:29:23,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103534930] [2024-11-28 02:29:23,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103534930] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:29:23,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651011962] [2024-11-28 02:29:23,884 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:29:23,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:29:23,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:29:23,885 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:29:23,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-28 02:29:24,061 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:29:24,061 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:29:24,062 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 02:29:24,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:29:24,528 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2024-11-28 02:29:24,529 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:29:24,896 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2024-11-28 02:29:24,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651011962] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:29:24,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:29:24,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 39 [2024-11-28 02:29:24,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850347036] [2024-11-28 02:29:24,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:29:24,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-28 02:29:24,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:29:24,897 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-28 02:29:24,898 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 02:29:24,898 INFO L87 Difference]: Start difference. First operand 159 states and 165 transitions. Second operand has 39 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:29:25,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:29:25,679 INFO L93 Difference]: Finished difference Result 268 states and 277 transitions. [2024-11-28 02:29:25,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 02:29:25,680 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 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 127 [2024-11-28 02:29:25,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:29:25,681 INFO L225 Difference]: With dead ends: 268 [2024-11-28 02:29:25,681 INFO L226 Difference]: Without dead ends: 138 [2024-11-28 02:29:25,681 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 218 SyntacticMatches, 24 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=633, Invalid=1917, Unknown=0, NotChecked=0, Total=2550 [2024-11-28 02:29:25,682 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 276 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:29:25,682 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [276 Valid, 40 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 02:29:25,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-28 02:29:25,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2024-11-28 02:29:25,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.037593984962406) internal successors, (138), 133 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:29:25,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2024-11-28 02:29:25,765 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 127 [2024-11-28 02:29:25,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:29:25,765 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2024-11-28 02:29:25,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:29:25,765 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2024-11-28 02:29:25,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-11-28 02:29:25,766 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:29:25,766 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:29:25,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-28 02:29:25,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:29:25,966 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:29:25,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:29:25,967 INFO L85 PathProgramCache]: Analyzing trace with hash 67362862, now seen corresponding path program 41 times [2024-11-28 02:29:25,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:29:25,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584583464] [2024-11-28 02:29:25,967 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:29:25,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:29:26,347 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-11-28 02:29:26,348 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:29:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-11-28 02:29:26,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:29:26,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584583464] [2024-11-28 02:29:26,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584583464] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:29:26,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023684850] [2024-11-28 02:29:26,788 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:29:26,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:29:26,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:29:26,791 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:29:26,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-28 02:29:27,505 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-11-28 02:29:27,505 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:29:27,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-28 02:29:27,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:29:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-11-28 02:29:28,015 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:29:28,396 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 144 proven. 121 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-11-28 02:29:28,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023684850] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:29:28,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:29:28,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 39 [2024-11-28 02:29:28,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479151438] [2024-11-28 02:29:28,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:29:28,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-28 02:29:28,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:29:28,398 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-28 02:29:28,398 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 02:29:28,398 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand has 39 states, 39 states have (on average 3.051282051282051) internal successors, (119), 39 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:29:28,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:29:28,688 INFO L93 Difference]: Finished difference Result 245 states and 253 transitions. [2024-11-28 02:29:28,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-28 02:29:28,688 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.051282051282051) internal successors, (119), 39 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2024-11-28 02:29:28,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:29:28,689 INFO L225 Difference]: With dead ends: 245 [2024-11-28 02:29:28,689 INFO L226 Difference]: Without dead ends: 137 [2024-11-28 02:29:28,690 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 230 SyntacticMatches, 24 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2024-11-28 02:29:28,691 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:29:28,691 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 94 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:29:28,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-28 02:29:28,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2024-11-28 02:29:28,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.037037037037037) internal successors, (140), 135 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:29:28,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2024-11-28 02:29:28,816 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 133 [2024-11-28 02:29:28,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:29:28,816 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2024-11-28 02:29:28,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.051282051282051) internal successors, (119), 39 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:29:28,816 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2024-11-28 02:29:28,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-11-28 02:29:28,817 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:29:28,817 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:29:28,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-28 02:29:29,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-11-28 02:29:29,017 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:29:29,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:29:29,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1048422382, now seen corresponding path program 42 times [2024-11-28 02:29:29,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:29:29,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167992992] [2024-11-28 02:29:29,018 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:29:29,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:29:29,197 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-11-28 02:29:29,197 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:29:39,982 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 599 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-11-28 02:29:39,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:29:39,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167992992] [2024-11-28 02:29:39,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167992992] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:29:39,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167198885] [2024-11-28 02:29:39,982 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:29:39,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:29:39,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:29:39,984 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:29:39,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-28 02:29:40,609 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-11-28 02:29:40,609 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:29:40,616 WARN L254 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 228 conjuncts are in the unsatisfiable core [2024-11-28 02:29:40,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:29:40,696 INFO L378 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 23 treesize of output 1 [2024-11-28 02:29:40,789 INFO L378 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 19 treesize of output 1 [2024-11-28 02:29:47,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:47,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:29:48,216 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:29:48,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 108 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 130 treesize of output 383 [2024-11-28 02:29:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 23 proven. 576 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-11-28 02:29:49,010 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:29:58,229 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 708 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 02:29:58,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167198885] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:29:58,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:29:58,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 47, 58] total 140 [2024-11-28 02:29:58,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061367362] [2024-11-28 02:29:58,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:29:58,230 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2024-11-28 02:29:58,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:29:58,231 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2024-11-28 02:29:58,232 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=924, Invalid=18536, Unknown=0, NotChecked=0, Total=19460 [2024-11-28 02:29:58,232 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand has 140 states, 140 states have (on average 2.342857142857143) internal successors, (328), 140 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:30:39,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:30:39,603 INFO L93 Difference]: Finished difference Result 312 states and 337 transitions. [2024-11-28 02:30:39,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2024-11-28 02:30:39,604 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.342857142857143) internal successors, (328), 140 states have internal predecessors, (328), 0 states have call successors, (0), 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 135 [2024-11-28 02:30:39,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:30:39,605 INFO L225 Difference]: With dead ends: 312 [2024-11-28 02:30:39,605 INFO L226 Difference]: Without dead ends: 307 [2024-11-28 02:30:39,607 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 196 SyntacticMatches, 9 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17492 ImplicationChecksByTransitivity, 48.9s TimeCoverageRelationStatistics Valid=4447, Invalid=58303, Unknown=0, NotChecked=0, Total=62750 [2024-11-28 02:30:39,607 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 165 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 8358 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 8747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 8358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2024-11-28 02:30:39,607 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 248 Invalid, 8747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 8358 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2024-11-28 02:30:39,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2024-11-28 02:30:39,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 209. [2024-11-28 02:30:39,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.0769230769230769) internal successors, (224), 208 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:30:39,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 224 transitions. [2024-11-28 02:30:39,751 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 224 transitions. Word has length 135 [2024-11-28 02:30:39,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:30:39,752 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 224 transitions. [2024-11-28 02:30:39,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.342857142857143) internal successors, (328), 140 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:30:39,752 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 224 transitions. [2024-11-28 02:30:39,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-28 02:30:39,753 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:30:39,753 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:30:39,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-11-28 02:30:39,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:30:39,954 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:30:39,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:30:39,954 INFO L85 PathProgramCache]: Analyzing trace with hash -563228618, now seen corresponding path program 43 times [2024-11-28 02:30:39,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:30:39,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055589925] [2024-11-28 02:30:39,954 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:30:39,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:30:39,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:30:40,508 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 146 proven. 167 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-11-28 02:30:40,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:30:40,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055589925] [2024-11-28 02:30:40,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055589925] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:30:40,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790995869] [2024-11-28 02:30:40,509 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:30:40,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:30:40,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:30:40,511 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:30:40,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-28 02:30:40,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:30:40,714 INFO L256 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 02:30:40,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:30:41,214 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-11-28 02:30:41,214 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:30:41,568 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 169 proven. 144 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-11-28 02:30:41,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790995869] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:30:41,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:30:41,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2024-11-28 02:30:41,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132117141] [2024-11-28 02:30:41,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:30:41,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-28 02:30:41,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:30:41,570 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-28 02:30:41,570 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=1453, Unknown=0, NotChecked=0, Total=1892 [2024-11-28 02:30:41,570 INFO L87 Difference]: Start difference. First operand 209 states and 224 transitions. Second operand has 44 states, 44 states have (on average 2.340909090909091) internal successors, (103), 44 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) [2024-11-28 02:30:42,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:30:42,483 INFO L93 Difference]: Finished difference Result 445 states and 476 transitions. [2024-11-28 02:30:42,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 02:30:42,483 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.340909090909091) internal successors, (103), 44 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 137 [2024-11-28 02:30:42,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:30:42,484 INFO L225 Difference]: With dead ends: 445 [2024-11-28 02:30:42,484 INFO L226 Difference]: Without dead ends: 212 [2024-11-28 02:30:42,484 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 234 SyntacticMatches, 25 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=439, Invalid=1453, Unknown=0, NotChecked=0, Total=1892 [2024-11-28 02:30:42,485 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 70 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 02:30:42,485 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 76 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 02:30:42,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2024-11-28 02:30:42,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2024-11-28 02:30:42,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.0761904761904761) internal successors, (226), 210 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:30:42,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 226 transitions. [2024-11-28 02:30:42,622 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 226 transitions. Word has length 137 [2024-11-28 02:30:42,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:30:42,622 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 226 transitions. [2024-11-28 02:30:42,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.340909090909091) internal successors, (103), 44 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) [2024-11-28 02:30:42,623 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 226 transitions. [2024-11-28 02:30:42,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-28 02:30:42,623 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:30:42,623 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:30:42,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-11-28 02:30:42,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:30:42,824 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:30:42,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:30:42,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1181070874, now seen corresponding path program 44 times [2024-11-28 02:30:42,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:30:42,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877194019] [2024-11-28 02:30:42,824 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:30:42,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:30:42,846 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:30:42,846 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:30:43,330 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 121 proven. 192 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2024-11-28 02:30:43,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:30:43,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877194019] [2024-11-28 02:30:43,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877194019] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:30:43,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768049179] [2024-11-28 02:30:43,330 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:30:43,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:30:43,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:30:43,332 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:30:43,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-28 02:30:43,536 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:30:43,537 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:30:43,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-28 02:30:43,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:30:43,916 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2024-11-28 02:30:43,916 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:30:44,302 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 144 proven. 169 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2024-11-28 02:30:44,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768049179] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:30:44,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:30:44,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2024-11-28 02:30:44,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057131179] [2024-11-28 02:30:44,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:30:44,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-28 02:30:44,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:30:44,304 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-28 02:30:44,304 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=1441, Unknown=0, NotChecked=0, Total=1892 [2024-11-28 02:30:44,304 INFO L87 Difference]: Start difference. First operand 211 states and 226 transitions. Second operand has 44 states, 44 states have (on average 2.340909090909091) internal successors, (103), 44 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) [2024-11-28 02:30:44,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:30:44,855 INFO L93 Difference]: Finished difference Result 279 states and 299 transitions. [2024-11-28 02:30:44,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-28 02:30:44,856 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.340909090909091) internal successors, (103), 44 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 139 [2024-11-28 02:30:44,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:30:44,857 INFO L225 Difference]: With dead ends: 279 [2024-11-28 02:30:44,857 INFO L226 Difference]: Without dead ends: 150 [2024-11-28 02:30:44,857 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 237 SyntacticMatches, 26 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1399 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=485, Invalid=1585, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 02:30:44,857 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 161 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 02:30:44,858 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 46 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 02:30:44,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-28 02:30:44,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 146. [2024-11-28 02:30:44,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.0344827586206897) internal successors, (150), 145 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:30:44,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2024-11-28 02:30:44,957 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 139 [2024-11-28 02:30:44,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:30:44,957 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2024-11-28 02:30:44,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.340909090909091) internal successors, (103), 44 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) [2024-11-28 02:30:44,957 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2024-11-28 02:30:44,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2024-11-28 02:30:44,957 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:30:44,958 INFO L218 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:30:44,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-28 02:30:45,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:30:45,158 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:30:45,158 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:30:45,159 INFO L85 PathProgramCache]: Analyzing trace with hash 733684998, now seen corresponding path program 45 times [2024-11-28 02:30:45,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:30:45,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692836736] [2024-11-28 02:30:45,159 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:30:45,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:30:45,411 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-11-28 02:30:45,411 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:30:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 0 proven. 701 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-28 02:30:54,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:30:54,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692836736] [2024-11-28 02:30:54,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692836736] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:30:54,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118509203] [2024-11-28 02:30:54,955 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:30:54,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:30:54,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:30:54,957 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:30:54,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-28 02:30:55,468 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-11-28 02:30:55,469 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:30:55,488 WARN L254 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 256 conjuncts are in the unsatisfiable core [2024-11-28 02:30:55,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:30:56,242 INFO L378 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 1 [2024-11-28 02:30:56,323 INFO L378 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 1 [2024-11-28 02:30:56,407 INFO L378 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 1 [2024-11-28 02:30:56,568 INFO L378 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 1 [2024-11-28 02:31:06,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:31:06,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:31:06,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:31:06,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:31:06,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:31:06,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:31:06,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:31:06,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:31:06,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:31:06,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:31:06,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:31:06,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:31:06,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:31:06,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:31:06,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-28 02:31:06,302 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:31:06,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 45 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 86 treesize of output 185 [2024-11-28 02:31:06,675 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 0 proven. 845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:31:06,675 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:31:13,300 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 0 proven. 701 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-11-28 02:31:13,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118509203] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:31:13,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:31:13,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 52, 37] total 121 [2024-11-28 02:31:13,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082422677] [2024-11-28 02:31:13,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:31:13,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2024-11-28 02:31:13,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:31:13,303 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2024-11-28 02:31:13,303 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=934, Invalid=13585, Unknown=1, NotChecked=0, Total=14520 [2024-11-28 02:31:13,304 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand has 121 states, 121 states have (on average 3.15702479338843) internal successors, (382), 121 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:31:33,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:31:33,038 INFO L93 Difference]: Finished difference Result 360 states and 372 transitions. [2024-11-28 02:31:33,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2024-11-28 02:31:33,039 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 3.15702479338843) internal successors, (382), 121 states have internal predecessors, (382), 0 states have call successors, (0), 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 145 [2024-11-28 02:31:33,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:31:33,040 INFO L225 Difference]: With dead ends: 360 [2024-11-28 02:31:33,040 INFO L226 Difference]: Without dead ends: 355 [2024-11-28 02:31:33,045 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 232 SyntacticMatches, 13 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11414 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=2092, Invalid=36913, Unknown=1, NotChecked=0, Total=39006 [2024-11-28 02:31:33,045 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 69 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 9360 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 9582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 9360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:31:33,045 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 183 Invalid, 9582 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [222 Valid, 9360 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2024-11-28 02:31:33,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2024-11-28 02:31:33,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 207. [2024-11-28 02:31:33,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.0388349514563107) internal successors, (214), 206 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:31:33,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 214 transitions. [2024-11-28 02:31:33,209 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 214 transitions. Word has length 145 [2024-11-28 02:31:33,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:31:33,209 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 214 transitions. [2024-11-28 02:31:33,210 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 3.15702479338843) internal successors, (382), 121 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:31:33,210 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 214 transitions. [2024-11-28 02:31:33,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2024-11-28 02:31:33,210 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:31:33,210 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:31:33,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-28 02:31:33,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:31:33,411 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:31:33,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:31:33,411 INFO L85 PathProgramCache]: Analyzing trace with hash 2109673514, now seen corresponding path program 46 times [2024-11-28 02:31:33,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:31:33,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38504765] [2024-11-28 02:31:33,411 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:31:33,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:31:33,437 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:31:33,437 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:31:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2024-11-28 02:31:33,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:31:33,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38504765] [2024-11-28 02:31:33,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38504765] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:31:33,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312136369] [2024-11-28 02:31:33,976 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:31:33,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:31:33,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:31:33,978 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:31:33,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-28 02:31:34,221 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:31:34,221 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:31:34,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 02:31:34,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:31:34,633 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2024-11-28 02:31:34,633 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:31:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 169 proven. 196 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2024-11-28 02:31:35,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312136369] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:31:35,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:31:35,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 45 [2024-11-28 02:31:35,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349633797] [2024-11-28 02:31:35,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:31:35,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-28 02:31:35,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:31:35,063 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-28 02:31:35,063 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=1501, Unknown=0, NotChecked=0, Total=1980 [2024-11-28 02:31:35,063 INFO L87 Difference]: Start difference. First operand 207 states and 214 transitions. Second operand has 45 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 45 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) [2024-11-28 02:31:36,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:31:36,826 INFO L93 Difference]: Finished difference Result 301 states and 312 transitions. [2024-11-28 02:31:36,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-28 02:31:36,827 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 45 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 147 [2024-11-28 02:31:36,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:31:36,828 INFO L225 Difference]: With dead ends: 301 [2024-11-28 02:31:36,828 INFO L226 Difference]: Without dead ends: 241 [2024-11-28 02:31:36,829 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 251 SyntacticMatches, 29 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2099 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1199, Invalid=4203, Unknown=0, NotChecked=0, Total=5402 [2024-11-28 02:31:36,830 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 165 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1486 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 02:31:36,831 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 68 Invalid, 1650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1486 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 02:31:36,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2024-11-28 02:31:36,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 183. [2024-11-28 02:31:36,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.0384615384615385) internal successors, (189), 182 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:31:36,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 189 transitions. [2024-11-28 02:31:36,994 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 189 transitions. Word has length 147 [2024-11-28 02:31:36,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:31:36,995 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 189 transitions. [2024-11-28 02:31:36,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 45 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) [2024-11-28 02:31:36,995 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 189 transitions. [2024-11-28 02:31:36,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2024-11-28 02:31:36,996 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:31:36,996 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:31:37,007 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-11-28 02:31:37,196 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:31:37,197 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:31:37,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:31:37,197 INFO L85 PathProgramCache]: Analyzing trace with hash 635423722, now seen corresponding path program 47 times [2024-11-28 02:31:37,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:31:37,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858330715] [2024-11-28 02:31:37,197 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:31:37,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:31:37,289 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-11-28 02:31:37,289 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:31:37,869 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2024-11-28 02:31:37,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:31:37,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858330715] [2024-11-28 02:31:37,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858330715] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:31:37,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127813378] [2024-11-28 02:31:37,869 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 02:31:37,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:31:37,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:31:37,871 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:31:37,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-28 02:31:38,392 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-11-28 02:31:38,392 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:31:38,397 INFO L256 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-28 02:31:38,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:31:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2024-11-28 02:31:39,056 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:31:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2024-11-28 02:31:39,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127813378] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:31:39,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:31:39,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 45 [2024-11-28 02:31:39,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265616969] [2024-11-28 02:31:39,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:31:39,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-28 02:31:39,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:31:39,466 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-28 02:31:39,466 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=1501, Unknown=0, NotChecked=0, Total=1980 [2024-11-28 02:31:39,466 INFO L87 Difference]: Start difference. First operand 183 states and 189 transitions. Second operand has 45 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 45 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) [2024-11-28 02:31:40,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:31:40,517 INFO L93 Difference]: Finished difference Result 308 states and 317 transitions. [2024-11-28 02:31:40,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-28 02:31:40,518 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 45 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 147 [2024-11-28 02:31:40,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:31:40,519 INFO L225 Difference]: With dead ends: 308 [2024-11-28 02:31:40,520 INFO L226 Difference]: Without dead ends: 158 [2024-11-28 02:31:40,520 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 266 SyntacticMatches, 28 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=836, Invalid=2586, Unknown=0, NotChecked=0, Total=3422 [2024-11-28 02:31:40,520 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 262 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 1035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:31:40,521 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 66 Invalid, 1035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 02:31:40,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-11-28 02:31:40,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2024-11-28 02:31:40,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0326797385620916) internal successors, (158), 153 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:31:40,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2024-11-28 02:31:40,683 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 147 [2024-11-28 02:31:40,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:31:40,683 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2024-11-28 02:31:40,683 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 45 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) [2024-11-28 02:31:40,683 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2024-11-28 02:31:40,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-11-28 02:31:40,684 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:31:40,684 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:31:40,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-28 02:31:40,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:31:40,885 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:31:40,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:31:40,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1645612266, now seen corresponding path program 48 times [2024-11-28 02:31:40,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:31:40,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201938257] [2024-11-28 02:31:40,885 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:31:40,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:31:41,056 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2024-11-28 02:31:41,057 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:31:41,645 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 171 proven. 194 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2024-11-28 02:31:41,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:31:41,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201938257] [2024-11-28 02:31:41,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201938257] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:31:41,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913906006] [2024-11-28 02:31:41,646 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 02:31:41,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:31:41,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:31:41,648 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:31:41,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-28 02:31:42,550 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2024-11-28 02:31:42,550 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:31:42,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 02:31:42,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:31:43,139 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 196 proven. 169 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2024-11-28 02:31:43,139 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:31:43,628 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 196 proven. 196 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2024-11-28 02:31:43,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913906006] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:31:43,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:31:43,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 33] total 49 [2024-11-28 02:31:43,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867920497] [2024-11-28 02:31:43,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:31:43,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-28 02:31:43,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:31:43,629 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-28 02:31:43,630 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=1847, Unknown=0, NotChecked=0, Total=2352 [2024-11-28 02:31:43,630 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand has 49 states, 49 states have (on average 2.2857142857142856) internal successors, (112), 49 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:31:44,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:31:44,247 INFO L93 Difference]: Finished difference Result 281 states and 289 transitions. [2024-11-28 02:31:44,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-28 02:31:44,247 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2857142857142856) internal successors, (112), 49 states have internal predecessors, (112), 0 states have call successors, (0), 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 153 [2024-11-28 02:31:44,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:31:44,248 INFO L225 Difference]: With dead ends: 281 [2024-11-28 02:31:44,248 INFO L226 Difference]: Without dead ends: 157 [2024-11-28 02:31:44,249 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 261 SyntacticMatches, 27 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=806, Invalid=2976, Unknown=0, NotChecked=0, Total=3782 [2024-11-28 02:31:44,249 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 25 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:31:44,250 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 78 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 02:31:44,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-28 02:31:44,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2024-11-28 02:31:44,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.032258064516129) internal successors, (160), 155 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:31:44,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2024-11-28 02:31:44,379 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 153 [2024-11-28 02:31:44,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:31:44,379 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2024-11-28 02:31:44,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2857142857142856) internal successors, (112), 49 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:31:44,380 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2024-11-28 02:31:44,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2024-11-28 02:31:44,380 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:31:44,381 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:31:44,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-28 02:31:44,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2024-11-28 02:31:44,581 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:31:44,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:31:44,582 INFO L85 PathProgramCache]: Analyzing trace with hash 46239994, now seen corresponding path program 49 times [2024-11-28 02:31:44,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:31:44,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490956437] [2024-11-28 02:31:44,582 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:31:44,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:31:44,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:32:02,658 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 81 proven. 899 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:32:02,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:32:02,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490956437] [2024-11-28 02:32:02,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490956437] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:32:02,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326609736] [2024-11-28 02:32:02,659 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 02:32:02,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:32:02,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:32:02,661 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:32:02,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-28 02:32:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 02:32:02,929 WARN L254 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 264 conjuncts are in the unsatisfiable core [2024-11-28 02:32:02,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:32:04,028 INFO L378 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 1 [2024-11-28 02:32:06,025 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 0 proven. 980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 02:32:06,025 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:32:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 980 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2024-11-28 02:32:12,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326609736] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:32:12,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:32:12,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 48, 33] total 129 [2024-11-28 02:32:12,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070228004] [2024-11-28 02:32:12,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:32:12,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2024-11-28 02:32:12,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:32:12,912 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2024-11-28 02:32:12,914 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=768, Invalid=15744, Unknown=0, NotChecked=0, Total=16512 [2024-11-28 02:32:12,914 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand has 129 states, 129 states have (on average 2.945736434108527) internal successors, (380), 129 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:26,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:32:26,947 INFO L93 Difference]: Finished difference Result 257 states and 264 transitions. [2024-11-28 02:32:26,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-28 02:32:26,948 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.945736434108527) internal successors, (380), 129 states have internal predecessors, (380), 0 states have call successors, (0), 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 155 [2024-11-28 02:32:26,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:32:26,949 INFO L225 Difference]: With dead ends: 257 [2024-11-28 02:32:26,949 INFO L226 Difference]: Without dead ends: 253 [2024-11-28 02:32:26,951 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8311 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=1431, Invalid=25301, Unknown=0, NotChecked=0, Total=26732 [2024-11-28 02:32:26,952 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 157 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 10554 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 10699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 10554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2024-11-28 02:32:26,952 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 255 Invalid, 10699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 10554 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2024-11-28 02:32:26,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2024-11-28 02:32:27,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 221. [2024-11-28 02:32:27,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.0363636363636364) internal successors, (228), 220 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:27,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 228 transitions. [2024-11-28 02:32:27,143 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 228 transitions. Word has length 155 [2024-11-28 02:32:27,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:32:27,143 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 228 transitions. [2024-11-28 02:32:27,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.945736434108527) internal successors, (380), 129 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:27,143 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 228 transitions. [2024-11-28 02:32:27,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2024-11-28 02:32:27,144 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:32:27,144 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:32:27,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-11-28 02:32:27,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2024-11-28 02:32:27,344 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:32:27,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:32:27,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1977233182, now seen corresponding path program 50 times [2024-11-28 02:32:27,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:32:27,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720322904] [2024-11-28 02:32:27,345 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:32:27,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:32:27,374 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:32:27,374 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:32:27,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 198 proven. 223 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2024-11-28 02:32:27,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:32:27,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720322904] [2024-11-28 02:32:27,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720322904] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:32:27,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540036672] [2024-11-28 02:32:27,978 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 02:32:27,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:32:27,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:32:27,980 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:32:27,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-28 02:32:28,220 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 02:32:28,220 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:32:28,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 02:32:28,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:32:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2024-11-28 02:32:28,776 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:32:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 225 proven. 196 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2024-11-28 02:32:29,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540036672] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:32:29,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:32:29,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2024-11-28 02:32:29,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403339588] [2024-11-28 02:32:29,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:32:29,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-28 02:32:29,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:32:29,202 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-28 02:32:29,203 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=1885, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 02:32:29,203 INFO L87 Difference]: Start difference. First operand 221 states and 228 transitions. Second operand has 50 states, 50 states have (on average 2.3) internal successors, (115), 50 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:30,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:32:30,383 INFO L93 Difference]: Finished difference Result 440 states and 454 transitions. [2024-11-28 02:32:30,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-28 02:32:30,384 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.3) internal successors, (115), 50 states have internal predecessors, (115), 0 states have call successors, (0), 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 157 [2024-11-28 02:32:30,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:32:30,385 INFO L225 Difference]: With dead ends: 440 [2024-11-28 02:32:30,385 INFO L226 Difference]: Without dead ends: 224 [2024-11-28 02:32:30,386 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 268 SyntacticMatches, 29 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1526 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=565, Invalid=1885, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 02:32:30,386 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 70 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 1505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 02:32:30,386 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 82 Invalid, 1505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1435 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 02:32:30,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-11-28 02:32:30,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2024-11-28 02:32:30,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.0360360360360361) internal successors, (230), 222 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:30,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 230 transitions. [2024-11-28 02:32:30,594 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 230 transitions. Word has length 157 [2024-11-28 02:32:30,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:32:30,595 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 230 transitions. [2024-11-28 02:32:30,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.3) internal successors, (115), 50 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:30,595 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 230 transitions. [2024-11-28 02:32:30,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-11-28 02:32:30,596 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:32:30,596 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:32:30,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2024-11-28 02:32:30,796 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-11-28 02:32:30,796 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:32:30,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:32:30,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1210596098, now seen corresponding path program 51 times [2024-11-28 02:32:30,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:32:30,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761445454] [2024-11-28 02:32:30,797 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:32:30,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:32:31,014 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-28 02:32:31,014 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:32:31,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 169 proven. 252 refuted. 0 times theorem prover too weak. 617 trivial. 0 not checked. [2024-11-28 02:32:31,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:32:31,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761445454] [2024-11-28 02:32:31,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761445454] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:32:31,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602771204] [2024-11-28 02:32:31,654 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 02:32:31,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:32:31,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:32:31,656 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:32:31,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-28 02:32:32,288 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-28 02:32:32,288 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:32:32,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 02:32:32,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:32:32,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 617 trivial. 0 not checked. [2024-11-28 02:32:32,754 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:32:33,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 196 proven. 225 refuted. 0 times theorem prover too weak. 617 trivial. 0 not checked. [2024-11-28 02:32:33,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602771204] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 02:32:33,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 02:32:33,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2024-11-28 02:32:33,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733909908] [2024-11-28 02:32:33,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 02:32:33,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-28 02:32:33,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 02:32:33,242 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-28 02:32:33,243 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=1871, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 02:32:33,243 INFO L87 Difference]: Start difference. First operand 223 states and 230 transitions. Second operand has 50 states, 50 states have (on average 2.3) internal successors, (115), 50 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:34,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 02:32:34,059 INFO L93 Difference]: Finished difference Result 299 states and 311 transitions. [2024-11-28 02:32:34,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-28 02:32:34,059 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.3) internal successors, (115), 50 states have internal predecessors, (115), 0 states have call successors, (0), 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 159 [2024-11-28 02:32:34,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 02:32:34,061 INFO L225 Difference]: With dead ends: 299 [2024-11-28 02:32:34,061 INFO L226 Difference]: Without dead ends: 170 [2024-11-28 02:32:34,061 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 271 SyntacticMatches, 30 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1842 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=617, Invalid=2035, Unknown=0, NotChecked=0, Total=2652 [2024-11-28 02:32:34,062 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 203 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 02:32:34,062 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 67 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 02:32:34,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-11-28 02:32:34,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 166. [2024-11-28 02:32:34,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.0303030303030303) internal successors, (170), 165 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:34,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 170 transitions. [2024-11-28 02:32:34,226 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 170 transitions. Word has length 159 [2024-11-28 02:32:34,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 02:32:34,226 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 170 transitions. [2024-11-28 02:32:34,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.3) internal successors, (115), 50 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 02:32:34,226 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 170 transitions. [2024-11-28 02:32:34,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2024-11-28 02:32:34,226 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 02:32:34,226 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 02:32:34,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-11-28 02:32:34,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-11-28 02:32:34,427 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 02:32:34,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 02:32:34,427 INFO L85 PathProgramCache]: Analyzing trace with hash 477289454, now seen corresponding path program 52 times [2024-11-28 02:32:34,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 02:32:34,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254016137] [2024-11-28 02:32:34,428 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:32:34,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 02:32:34,491 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:32:34,491 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:32:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2024-11-28 02:32:49,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 02:32:49,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254016137] [2024-11-28 02:32:49,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254016137] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 02:32:49,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665716648] [2024-11-28 02:32:49,366 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 02:32:49,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 02:32:49,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 02:32:49,368 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 02:32:49,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf56b860-fdea-4ff8-9f11-f5560a9aff08/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-28 02:32:49,637 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 02:32:49,637 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 02:32:49,642 WARN L254 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 275 conjuncts are in the unsatisfiable core [2024-11-28 02:32:49,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 02:32:57,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 0 proven. 1121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 02:32:57,464 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 02:33:11,419 WARN L286 SmtUtils]: Spent 8.25s on a formula simplification that was a NOOP. DAG size: 765 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-28 02:33:11,420 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-28 02:33:11,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 30 select indices, 30 select index equivalence classes, 0 disjoint index pairs (out of 435 index pairs), introduced 30 new quantified variables, introduced 435 case distinctions, treesize of input 256 treesize of output 2045