./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.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_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/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_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/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_cd79a2e2-01bb-40af-ab04-257c6c27164d/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 05dbf98a57cbdf117305bcdd9c3dde8d1b2284b890adec5d1f5924f0e5e4bbbb --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:50:23,448 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:50:23,546 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 04:50:23,553 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:50:23,554 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:50:23,594 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:50:23,595 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:50:23,595 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:50:23,596 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:50:23,596 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:50:23,596 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:50:23,596 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:50:23,597 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:50:23,597 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:50:23,597 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:50:23,597 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:50:23,597 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 04:50:23,597 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:50:23,597 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:50:23,598 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:50:23,598 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:50:23,598 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 04:50:23,598 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:50:23,598 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 04:50:23,598 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:50:23,598 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 04:50:23,598 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:50:23,598 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:50:23,598 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:50:23,600 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:50:23,601 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:50:23,601 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:50:23,601 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:50:23,601 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:50:23,601 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:50:23,601 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:50:23,601 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:50:23,602 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:50:23,602 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:50:23,602 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:50:23,602 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 04:50:23,602 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 04:50:23,602 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:50:23,602 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:50:23,603 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:50:23,603 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:50:23,603 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:50:23,603 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:50:23,603 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_cd79a2e2-01bb-40af-ab04-257c6c27164d/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 -> 05dbf98a57cbdf117305bcdd9c3dde8d1b2284b890adec5d1f5924f0e5e4bbbb [2024-11-28 04:50:23,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:50:23,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:50:23,980 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:50:23,982 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:50:23,982 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:50:23,984 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c [2024-11-28 04:50:27,347 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/data/1c7216b1b/41268d04fe7f42abbba7712b4e484802/FLAGeb5ab26ad [2024-11-28 04:50:27,725 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:50:27,728 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c [2024-11-28 04:50:27,737 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/data/1c7216b1b/41268d04fe7f42abbba7712b4e484802/FLAGeb5ab26ad [2024-11-28 04:50:27,933 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/data/1c7216b1b/41268d04fe7f42abbba7712b4e484802 [2024-11-28 04:50:27,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:50:27,937 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:50:27,938 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:50:27,938 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:50:27,943 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:50:27,943 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:50:27" (1/1) ... [2024-11-28 04:50:27,944 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d563e8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:27, skipping insertion in model container [2024-11-28 04:50:27,944 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:50:27" (1/1) ... [2024-11-28 04:50:27,963 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:50:28,154 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_cd79a2e2-01bb-40af-ab04-257c6c27164d/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c[490,503] [2024-11-28 04:50:28,188 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:50:28,200 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:50:28,213 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_cd79a2e2-01bb-40af-ab04-257c6c27164d/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound50.c[490,503] [2024-11-28 04:50:28,235 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:50:28,255 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:50:28,256 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:28 WrapperNode [2024-11-28 04:50:28,256 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:50:28,258 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:50:28,258 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:50:28,258 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:50:28,267 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:28" (1/1) ... [2024-11-28 04:50:28,274 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:28" (1/1) ... [2024-11-28 04:50:28,294 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2024-11-28 04:50:28,294 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:50:28,295 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:50:28,295 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:50:28,295 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:50:28,305 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:28" (1/1) ... [2024-11-28 04:50:28,305 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:28" (1/1) ... [2024-11-28 04:50:28,307 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:28" (1/1) ... [2024-11-28 04:50:28,320 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-28 04:50:28,320 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:28" (1/1) ... [2024-11-28 04:50:28,320 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:28" (1/1) ... [2024-11-28 04:50:28,324 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:28" (1/1) ... [2024-11-28 04:50:28,325 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:28" (1/1) ... [2024-11-28 04:50:28,330 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:28" (1/1) ... [2024-11-28 04:50:28,331 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:28" (1/1) ... [2024-11-28 04:50:28,332 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:28" (1/1) ... [2024-11-28 04:50:28,338 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:50:28,339 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:50:28,339 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:50:28,339 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:50:28,340 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:28" (1/1) ... [2024-11-28 04:50:28,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:50:28,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:28,383 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:50:28,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:50:28,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:50:28,419 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-28 04:50:28,419 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-28 04:50:28,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:50:28,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:50:28,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:50:28,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-28 04:50:28,420 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-28 04:50:28,492 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:50:28,494 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:50:28,687 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-28 04:50:28,687 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:50:28,704 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:50:28,704 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-28 04:50:28,705 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:50:28 BoogieIcfgContainer [2024-11-28 04:50:28,705 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:50:28,708 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:50:28,708 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:50:28,715 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:50:28,715 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:50:27" (1/3) ... [2024-11-28 04:50:28,716 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c4c6acc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:50:28, skipping insertion in model container [2024-11-28 04:50:28,716 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:50:28" (2/3) ... [2024-11-28 04:50:28,716 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c4c6acc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:50:28, skipping insertion in model container [2024-11-28 04:50:28,716 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:50:28" (3/3) ... [2024-11-28 04:50:28,718 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound50.c [2024-11-28 04:50:28,739 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:50:28,741 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd3-ll_valuebound50.c that has 3 procedures, 32 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-28 04:50:28,810 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:50:28,825 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;@292f8378, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:50:28,825 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 04:50:28,830 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-28 04:50:28,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-28 04:50:28,839 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:28,840 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:50:28,840 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:28,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:28,847 INFO L85 PathProgramCache]: Analyzing trace with hash 843678977, now seen corresponding path program 1 times [2024-11-28 04:50:28,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:28,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346520963] [2024-11-28 04:50:28,856 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:28,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:29,071 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:50:29,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:29,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346520963] [2024-11-28 04:50:29,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346520963] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:50:29,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314241641] [2024-11-28 04:50:29,074 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:29,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:29,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:29,079 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:29,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:50:29,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:29,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-28 04:50:29,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:29,253 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 04:50:29,253 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:50:29,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314241641] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:50:29,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:50:29,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-28 04:50:29,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902469239] [2024-11-28 04:50:29,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:50:29,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 04:50:29,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:29,293 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 04:50:29,293 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:50:29,296 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:50:29,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:29,331 INFO L93 Difference]: Finished difference Result 61 states and 103 transitions. [2024-11-28 04:50:29,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 04:50:29,337 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2024-11-28 04:50:29,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:29,346 INFO L225 Difference]: With dead ends: 61 [2024-11-28 04:50:29,346 INFO L226 Difference]: Without dead ends: 28 [2024-11-28 04:50:29,350 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 30 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 04:50:29,357 INFO L435 NwaCegarLoop]: 41 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, 41 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 04:50:29,358 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:50:29,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-28 04:50:29,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-28 04:50:29,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 04:50:29,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2024-11-28 04:50:29,416 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 29 [2024-11-28 04:50:29,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:29,417 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2024-11-28 04:50:29,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:50:29,418 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2024-11-28 04:50:29,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-28 04:50:29,420 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:29,420 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:50:29,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 04:50:29,621 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:29,621 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:29,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:29,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1035775035, now seen corresponding path program 1 times [2024-11-28 04:50:29,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:29,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940077116] [2024-11-28 04:50:29,623 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:29,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:30,084 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:50:30,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:30,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940077116] [2024-11-28 04:50:30,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940077116] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:50:30,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:50:30,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 04:50:30,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972818339] [2024-11-28 04:50:30,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:50:30,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:50:30,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:30,088 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:50:30,088 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:50:30,088 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 04:50:30,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:30,235 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2024-11-28 04:50:30,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:50:30,236 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2024-11-28 04:50:30,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:30,241 INFO L225 Difference]: With dead ends: 44 [2024-11-28 04:50:30,241 INFO L226 Difference]: Without dead ends: 37 [2024-11-28 04:50:30,241 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:50:30,242 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:30,246 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 90 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:50:30,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-28 04:50:30,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2024-11-28 04:50:30,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-11-28 04:50:30,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2024-11-28 04:50:30,266 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 29 [2024-11-28 04:50:30,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:30,267 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2024-11-28 04:50:30,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 04:50:30,267 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2024-11-28 04:50:30,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-28 04:50:30,270 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:30,270 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:50:30,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 04:50:30,270 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:30,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:30,271 INFO L85 PathProgramCache]: Analyzing trace with hash -2050156495, now seen corresponding path program 1 times [2024-11-28 04:50:30,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:30,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225124203] [2024-11-28 04:50:30,272 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:30,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:50:30,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551031232] [2024-11-28 04:50:30,311 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:30,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:30,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:30,314 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:30,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:50:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:30,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:50:30,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:50:30,573 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:50:30,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:30,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225124203] [2024-11-28 04:50:30,575 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:50:30,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551031232] [2024-11-28 04:50:30,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551031232] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:50:30,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:50:30,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:50:30,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320337179] [2024-11-28 04:50:30,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:50:30,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:50:30,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:30,577 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:50:30,577 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:50:30,578 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 04:50:30,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:30,684 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2024-11-28 04:50:30,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:50:30,685 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2024-11-28 04:50:30,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:30,686 INFO L225 Difference]: With dead ends: 43 [2024-11-28 04:50:30,686 INFO L226 Difference]: Without dead ends: 41 [2024-11-28 04:50:30,687 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:50:30,688 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:30,688 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:50:30,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-28 04:50:30,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2024-11-28 04:50:30,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-28 04:50:30,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2024-11-28 04:50:30,704 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 30 [2024-11-28 04:50:30,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:30,704 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2024-11-28 04:50:30,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 04:50:30,704 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2024-11-28 04:50:30,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-28 04:50:30,705 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:30,705 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:50:30,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 04:50:30,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:30,906 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:30,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:30,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1667987617, now seen corresponding path program 1 times [2024-11-28 04:50:30,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:30,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242739964] [2024-11-28 04:50:30,907 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:30,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:30,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:50:31,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:31,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242739964] [2024-11-28 04:50:31,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242739964] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:50:31,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557440667] [2024-11-28 04:50:31,259 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:31,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:31,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:31,266 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:31,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:50:31,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:31,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:50:31,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:31,465 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:50:31,468 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:50:31,649 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-28 04:50:31,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557440667] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:50:31,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:50:31,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-11-28 04:50:31,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202922337] [2024-11-28 04:50:31,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:50:31,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:50:31,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:31,653 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:50:31,654 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:50:31,654 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:50:31,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:31,941 INFO L93 Difference]: Finished difference Result 82 states and 122 transitions. [2024-11-28 04:50:31,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:50:31,941 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2024-11-28 04:50:31,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:31,943 INFO L225 Difference]: With dead ends: 82 [2024-11-28 04:50:31,943 INFO L226 Difference]: Without dead ends: 75 [2024-11-28 04:50:31,944 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-11-28 04:50:31,945 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 67 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:31,945 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 166 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:50:31,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-28 04:50:31,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2024-11-28 04:50:31,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 34 states have internal predecessors, (45), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-28 04:50:31,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 78 transitions. [2024-11-28 04:50:31,977 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 78 transitions. Word has length 32 [2024-11-28 04:50:31,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:31,978 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 78 transitions. [2024-11-28 04:50:31,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 04:50:31,978 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 78 transitions. [2024-11-28 04:50:31,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-28 04:50:31,979 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:31,979 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:50:31,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 04:50:32,183 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:32,184 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:32,184 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:32,184 INFO L85 PathProgramCache]: Analyzing trace with hash -173910057, now seen corresponding path program 1 times [2024-11-28 04:50:32,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:32,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584924409] [2024-11-28 04:50:32,184 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:32,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:32,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:50:32,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [208357614] [2024-11-28 04:50:32,211 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:32,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:32,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:32,214 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:32,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:50:32,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:32,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-28 04:50:32,306 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:50:32,497 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:50:32,647 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:50:32,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:32,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584924409] [2024-11-28 04:50:32,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:50:32,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208357614] [2024-11-28 04:50:32,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208357614] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:50:32,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:50:32,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2024-11-28 04:50:32,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517733977] [2024-11-28 04:50:32,651 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:50:32,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 04:50:32,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:32,653 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 04:50:32,653 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:50:32,653 INFO L87 Difference]: Start difference. First operand 54 states and 78 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 04:50:32,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:32,924 INFO L93 Difference]: Finished difference Result 83 states and 120 transitions. [2024-11-28 04:50:32,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:50:32,925 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2024-11-28 04:50:32,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:32,926 INFO L225 Difference]: With dead ends: 83 [2024-11-28 04:50:32,927 INFO L226 Difference]: Without dead ends: 81 [2024-11-28 04:50:32,927 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:50:32,928 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 26 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:32,928 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 216 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:50:32,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-11-28 04:50:32,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2024-11-28 04:50:32,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 48 states have internal predecessors, (65), 25 states have call successors, (25), 4 states have call predecessors, (25), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-28 04:50:32,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 114 transitions. [2024-11-28 04:50:32,963 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 114 transitions. Word has length 33 [2024-11-28 04:50:32,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:32,964 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 114 transitions. [2024-11-28 04:50:32,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 04:50:32,964 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 114 transitions. [2024-11-28 04:50:32,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-28 04:50:32,965 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:32,965 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:50:32,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 04:50:33,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:33,168 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:33,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:33,169 INFO L85 PathProgramCache]: Analyzing trace with hash 379334257, now seen corresponding path program 2 times [2024-11-28 04:50:33,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:33,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177654682] [2024-11-28 04:50:33,169 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:50:33,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:33,198 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:50:33,198 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:50:33,390 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:50:33,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:33,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177654682] [2024-11-28 04:50:33,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177654682] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:50:33,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805957640] [2024-11-28 04:50:33,391 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:50:33,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:33,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:33,394 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:33,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:50:33,468 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:50:33,468 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:50:33,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:50:33,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:33,526 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:50:33,527 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:50:33,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805957640] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:50:33,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:50:33,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-11-28 04:50:33,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118882062] [2024-11-28 04:50:33,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:50:33,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:50:33,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:33,530 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:50:33,531 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-28 04:50:33,532 INFO L87 Difference]: Start difference. First operand 77 states and 114 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 04:50:33,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:33,705 INFO L93 Difference]: Finished difference Result 116 states and 178 transitions. [2024-11-28 04:50:33,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:50:33,705 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 36 [2024-11-28 04:50:33,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:33,707 INFO L225 Difference]: With dead ends: 116 [2024-11-28 04:50:33,707 INFO L226 Difference]: Without dead ends: 87 [2024-11-28 04:50:33,708 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-28 04:50:33,709 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:33,709 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 122 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:50:33,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-11-28 04:50:33,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 58. [2024-11-28 04:50:33,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 37 states have internal predecessors, (46), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-28 04:50:33,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 79 transitions. [2024-11-28 04:50:33,742 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 79 transitions. Word has length 36 [2024-11-28 04:50:33,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:33,742 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 79 transitions. [2024-11-28 04:50:33,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-11-28 04:50:33,742 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 79 transitions. [2024-11-28 04:50:33,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-28 04:50:33,748 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:33,748 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 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 04:50:33,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 04:50:33,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:33,949 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:33,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:33,950 INFO L85 PathProgramCache]: Analyzing trace with hash 983263606, now seen corresponding path program 1 times [2024-11-28 04:50:33,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:33,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272676069] [2024-11-28 04:50:33,950 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:33,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:50:33,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [742994748] [2024-11-28 04:50:33,971 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:33,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:33,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:33,978 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:33,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:50:34,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:34,054 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 04:50:34,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-11-28 04:50:34,235 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:50:34,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:34,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272676069] [2024-11-28 04:50:34,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:50:34,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742994748] [2024-11-28 04:50:34,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742994748] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:50:34,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:50:34,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-11-28 04:50:34,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200587843] [2024-11-28 04:50:34,318 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:50:34,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 04:50:34,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:34,320 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 04:50:34,320 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:50:34,320 INFO L87 Difference]: Start difference. First operand 58 states and 79 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 04:50:34,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:34,587 INFO L93 Difference]: Finished difference Result 79 states and 110 transitions. [2024-11-28 04:50:34,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 04:50:34,588 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2024-11-28 04:50:34,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:34,589 INFO L225 Difference]: With dead ends: 79 [2024-11-28 04:50:34,589 INFO L226 Difference]: Without dead ends: 77 [2024-11-28 04:50:34,590 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:50:34,591 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 21 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:34,591 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 179 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:50:34,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-28 04:50:34,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2024-11-28 04:50:34,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 45 states have internal predecessors, (57), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-28 04:50:34,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 106 transitions. [2024-11-28 04:50:34,624 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 106 transitions. Word has length 38 [2024-11-28 04:50:34,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:34,625 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 106 transitions. [2024-11-28 04:50:34,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-11-28 04:50:34,625 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 106 transitions. [2024-11-28 04:50:34,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 04:50:34,626 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:34,627 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 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 04:50:34,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-28 04:50:34,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:34,831 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:34,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:34,832 INFO L85 PathProgramCache]: Analyzing trace with hash 991206135, now seen corresponding path program 1 times [2024-11-28 04:50:34,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:34,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105207015] [2024-11-28 04:50:34,832 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:34,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:50:34,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565493252] [2024-11-28 04:50:34,852 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:34,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:34,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:34,857 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:34,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 04:50:34,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:34,929 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:50:34,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:35,003 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-11-28 04:50:35,003 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:50:35,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:35,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105207015] [2024-11-28 04:50:35,004 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:50:35,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565493252] [2024-11-28 04:50:35,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565493252] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:50:35,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:50:35,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:50:35,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618093787] [2024-11-28 04:50:35,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:50:35,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:50:35,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:35,006 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:50:35,006 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:50:35,006 INFO L87 Difference]: Start difference. First operand 75 states and 106 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 04:50:35,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:35,132 INFO L93 Difference]: Finished difference Result 104 states and 148 transitions. [2024-11-28 04:50:35,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:50:35,133 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2024-11-28 04:50:35,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:35,135 INFO L225 Difference]: With dead ends: 104 [2024-11-28 04:50:35,135 INFO L226 Difference]: Without dead ends: 102 [2024-11-28 04:50:35,135 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:50:35,136 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:35,139 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 112 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:50:35,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-11-28 04:50:35,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2024-11-28 04:50:35,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 54 states have internal predecessors, (69), 37 states have call successors, (37), 7 states have call predecessors, (37), 7 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2024-11-28 04:50:35,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 142 transitions. [2024-11-28 04:50:35,201 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 142 transitions. Word has length 43 [2024-11-28 04:50:35,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:35,202 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 142 transitions. [2024-11-28 04:50:35,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 04:50:35,202 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 142 transitions. [2024-11-28 04:50:35,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-28 04:50:35,203 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:35,204 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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 04:50:35,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 04:50:35,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:35,408 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:35,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:35,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1573549508, now seen corresponding path program 1 times [2024-11-28 04:50:35,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:35,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978198721] [2024-11-28 04:50:35,409 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:35,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:50:35,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132571474] [2024-11-28 04:50:35,439 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:35,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:35,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:35,449 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:35,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 04:50:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:35,517 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:50:35,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-11-28 04:50:35,597 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:50:35,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:35,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978198721] [2024-11-28 04:50:35,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:50:35,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132571474] [2024-11-28 04:50:35,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132571474] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:50:35,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:50:35,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:50:35,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362781284] [2024-11-28 04:50:35,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:50:35,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:50:35,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:35,601 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:50:35,601 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:50:35,602 INFO L87 Difference]: Start difference. First operand 98 states and 142 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 04:50:35,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:35,747 INFO L93 Difference]: Finished difference Result 148 states and 231 transitions. [2024-11-28 04:50:35,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:50:35,748 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2024-11-28 04:50:35,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:35,750 INFO L225 Difference]: With dead ends: 148 [2024-11-28 04:50:35,750 INFO L226 Difference]: Without dead ends: 146 [2024-11-28 04:50:35,751 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:50:35,752 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:35,752 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 120 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:50:35,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-28 04:50:35,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 134. [2024-11-28 04:50:35,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 65 states have internal predecessors, (72), 69 states have call successors, (69), 8 states have call predecessors, (69), 8 states have return successors, (68), 60 states have call predecessors, (68), 68 states have call successors, (68) [2024-11-28 04:50:35,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 209 transitions. [2024-11-28 04:50:35,833 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 209 transitions. Word has length 45 [2024-11-28 04:50:35,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:35,834 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 209 transitions. [2024-11-28 04:50:35,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-11-28 04:50:35,834 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 209 transitions. [2024-11-28 04:50:35,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-28 04:50:35,840 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:35,841 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:50:35,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 04:50:36,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:36,042 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:36,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:36,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1799924239, now seen corresponding path program 1 times [2024-11-28 04:50:36,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:36,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128234403] [2024-11-28 04:50:36,043 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:36,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:36,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:50:36,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1185562871] [2024-11-28 04:50:36,069 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:36,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:36,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:36,072 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:36,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 04:50:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:36,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-28 04:50:36,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:37,203 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-28 04:50:37,204 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:50:38,041 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-28 04:50:38,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:38,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128234403] [2024-11-28 04:50:38,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:50:38,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185562871] [2024-11-28 04:50:38,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185562871] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:50:38,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:50:38,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-11-28 04:50:38,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708313423] [2024-11-28 04:50:38,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:50:38,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 04:50:38,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:38,043 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 04:50:38,044 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-11-28 04:50:38,044 INFO L87 Difference]: Start difference. First operand 134 states and 209 transitions. Second operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-28 04:50:42,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:42,388 INFO L93 Difference]: Finished difference Result 358 states and 580 transitions. [2024-11-28 04:50:42,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-28 04:50:42,389 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 55 [2024-11-28 04:50:42,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:42,395 INFO L225 Difference]: With dead ends: 358 [2024-11-28 04:50:42,397 INFO L226 Difference]: Without dead ends: 276 [2024-11-28 04:50:42,403 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=398, Invalid=1672, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 04:50:42,404 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 120 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:42,404 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 285 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-28 04:50:42,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2024-11-28 04:50:42,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 204. [2024-11-28 04:50:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 99 states have (on average 1.3131313131313131) internal successors, (130), 106 states have internal predecessors, (130), 93 states have call successors, (93), 11 states have call predecessors, (93), 11 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-28 04:50:42,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 315 transitions. [2024-11-28 04:50:42,595 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 315 transitions. Word has length 55 [2024-11-28 04:50:42,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:42,595 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 315 transitions. [2024-11-28 04:50:42,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-28 04:50:42,596 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 315 transitions. [2024-11-28 04:50:42,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-28 04:50:42,598 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:42,598 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 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 04:50:42,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 04:50:42,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 04:50:42,799 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:42,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:42,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1162352819, now seen corresponding path program 1 times [2024-11-28 04:50:42,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:42,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819506791] [2024-11-28 04:50:42,800 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:42,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:42,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:50:42,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1805420792] [2024-11-28 04:50:42,835 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:42,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:42,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:42,838 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:42,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 04:50:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:42,925 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-28 04:50:42,931 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:43,652 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-28 04:50:43,652 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:50:43,916 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-28 04:50:43,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:43,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819506791] [2024-11-28 04:50:43,917 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:50:43,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805420792] [2024-11-28 04:50:43,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805420792] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:50:43,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:50:43,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 22 [2024-11-28 04:50:43,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146990848] [2024-11-28 04:50:43,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:50:43,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-28 04:50:43,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:43,919 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-28 04:50:43,919 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2024-11-28 04:50:43,920 INFO L87 Difference]: Start difference. First operand 204 states and 315 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-28 04:50:46,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:46,351 INFO L93 Difference]: Finished difference Result 255 states and 394 transitions. [2024-11-28 04:50:46,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-28 04:50:46,352 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 59 [2024-11-28 04:50:46,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:46,357 INFO L225 Difference]: With dead ends: 255 [2024-11-28 04:50:46,357 INFO L226 Difference]: Without dead ends: 253 [2024-11-28 04:50:46,360 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=190, Invalid=932, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 04:50:46,361 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 103 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:46,363 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 285 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-28 04:50:46,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2024-11-28 04:50:46,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 212. [2024-11-28 04:50:46,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 105 states have (on average 1.2952380952380953) internal successors, (136), 112 states have internal predecessors, (136), 93 states have call successors, (93), 13 states have call predecessors, (93), 13 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2024-11-28 04:50:46,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 321 transitions. [2024-11-28 04:50:46,540 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 321 transitions. Word has length 59 [2024-11-28 04:50:46,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:46,541 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 321 transitions. [2024-11-28 04:50:46,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 19 states have internal predecessors, (45), 6 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2024-11-28 04:50:46,542 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 321 transitions. [2024-11-28 04:50:46,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-28 04:50:46,544 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:46,544 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:50:46,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-28 04:50:46,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-28 04:50:46,749 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:46,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:46,749 INFO L85 PathProgramCache]: Analyzing trace with hash 688067520, now seen corresponding path program 2 times [2024-11-28 04:50:46,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:46,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000589263] [2024-11-28 04:50:46,750 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:50:46,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:46,808 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:50:46,811 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:50:46,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509835895] [2024-11-28 04:50:46,814 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:50:46,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:46,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:46,817 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:46,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 04:50:46,901 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:50:46,901 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:50:46,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-28 04:50:46,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:47,792 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-28 04:50:47,793 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:50:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-28 04:50:48,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:50:48,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000589263] [2024-11-28 04:50:48,592 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:50:48,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509835895] [2024-11-28 04:50:48,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509835895] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:50:48,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:50:48,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2024-11-28 04:50:48,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814037721] [2024-11-28 04:50:48,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:50:48,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 04:50:48,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:50:48,595 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 04:50:48,596 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2024-11-28 04:50:48,596 INFO L87 Difference]: Start difference. First operand 212 states and 321 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 24 states have internal predecessors, (41), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2024-11-28 04:50:57,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:50:57,282 INFO L93 Difference]: Finished difference Result 413 states and 629 transitions. [2024-11-28 04:50:57,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-28 04:50:57,284 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 24 states have internal predecessors, (41), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 64 [2024-11-28 04:50:57,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:50:57,288 INFO L225 Difference]: With dead ends: 413 [2024-11-28 04:50:57,288 INFO L226 Difference]: Without dead ends: 352 [2024-11-28 04:50:57,290 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=688, Invalid=2734, Unknown=0, NotChecked=0, Total=3422 [2024-11-28 04:50:57,291 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 174 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:50:57,291 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 413 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-11-28 04:50:57,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2024-11-28 04:50:57,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 305. [2024-11-28 04:50:57,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 148 states have (on average 1.2972972972972974) internal successors, (192), 159 states have internal predecessors, (192), 137 states have call successors, (137), 19 states have call predecessors, (137), 19 states have return successors, (136), 126 states have call predecessors, (136), 136 states have call successors, (136) [2024-11-28 04:50:57,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 465 transitions. [2024-11-28 04:50:57,529 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 465 transitions. Word has length 64 [2024-11-28 04:50:57,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:50:57,529 INFO L471 AbstractCegarLoop]: Abstraction has 305 states and 465 transitions. [2024-11-28 04:50:57,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 24 states have internal predecessors, (41), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2024-11-28 04:50:57,530 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 465 transitions. [2024-11-28 04:50:57,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-28 04:50:57,531 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:50:57,531 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 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, 1, 1, 1, 1, 1] [2024-11-28 04:50:57,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-28 04:50:57,735 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-28 04:50:57,736 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:50:57,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:50:57,736 INFO L85 PathProgramCache]: Analyzing trace with hash 947334894, now seen corresponding path program 1 times [2024-11-28 04:50:57,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:50:57,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156195980] [2024-11-28 04:50:57,737 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:57,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:50:57,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:50:57,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1685494070] [2024-11-28 04:50:57,784 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:50:57,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:50:57,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:50:57,791 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:50:57,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 04:50:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:50:57,890 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-28 04:50:57,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:50:59,058 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-11-28 04:50:59,059 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:00,568 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 30 proven. 19 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2024-11-28 04:51:00,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:51:00,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156195980] [2024-11-28 04:51:00,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:51:00,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685494070] [2024-11-28 04:51:00,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685494070] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:51:00,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:51:00,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2024-11-28 04:51:00,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832467749] [2024-11-28 04:51:00,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:00,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 04:51:00,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:51:00,571 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 04:51:00,571 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 04:51:00,571 INFO L87 Difference]: Start difference. First operand 305 states and 465 transitions. Second operand has 33 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 31 states have internal predecessors, (46), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2024-11-28 04:51:05,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:51:20,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:20,508 INFO L93 Difference]: Finished difference Result 554 states and 896 transitions. [2024-11-28 04:51:20,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-11-28 04:51:20,509 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 31 states have internal predecessors, (46), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 79 [2024-11-28 04:51:20,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:20,515 INFO L225 Difference]: With dead ends: 554 [2024-11-28 04:51:20,515 INFO L226 Difference]: Without dead ends: 546 [2024-11-28 04:51:20,518 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2683 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=1699, Invalid=7613, Unknown=0, NotChecked=0, Total=9312 [2024-11-28 04:51:20,519 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 187 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 1356 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 1678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 1356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:20,519 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 646 Invalid, 1678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 1356 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2024-11-28 04:51:20,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2024-11-28 04:51:20,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 392. [2024-11-28 04:51:20,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 189 states have (on average 1.3280423280423281) internal successors, (251), 202 states have internal predecessors, (251), 181 states have call successors, (181), 21 states have call predecessors, (181), 21 states have return successors, (180), 168 states have call predecessors, (180), 180 states have call successors, (180) [2024-11-28 04:51:20,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 612 transitions. [2024-11-28 04:51:20,950 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 612 transitions. Word has length 79 [2024-11-28 04:51:20,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:20,950 INFO L471 AbstractCegarLoop]: Abstraction has 392 states and 612 transitions. [2024-11-28 04:51:20,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 31 states have internal predecessors, (46), 9 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2024-11-28 04:51:20,951 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 612 transitions. [2024-11-28 04:51:20,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-11-28 04:51:20,952 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:20,953 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 2, 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, 1] [2024-11-28 04:51:20,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-28 04:51:21,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 04:51:21,157 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:21,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:21,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1617309069, now seen corresponding path program 2 times [2024-11-28 04:51:21,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:51:21,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871624989] [2024-11-28 04:51:21,158 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:51:21,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:51:21,178 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:51:21,179 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:51:21,501 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-11-28 04:51:21,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:51:21,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871624989] [2024-11-28 04:51:21,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871624989] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:51:21,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321262705] [2024-11-28 04:51:21,503 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:51:21,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:21,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:21,506 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:21,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 04:51:21,612 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:51:21,612 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:51:21,614 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 04:51:21,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:21,734 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-11-28 04:51:21,734 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:21,910 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-11-28 04:51:21,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321262705] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:51:21,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:51:21,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2024-11-28 04:51:21,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542215022] [2024-11-28 04:51:21,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:21,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 04:51:21,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:51:21,913 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 04:51:21,913 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-28 04:51:21,913 INFO L87 Difference]: Start difference. First operand 392 states and 612 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-28 04:51:23,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:23,070 INFO L93 Difference]: Finished difference Result 716 states and 1124 transitions. [2024-11-28 04:51:23,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 04:51:23,071 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 84 [2024-11-28 04:51:23,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:23,076 INFO L225 Difference]: With dead ends: 716 [2024-11-28 04:51:23,076 INFO L226 Difference]: Without dead ends: 446 [2024-11-28 04:51:23,078 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 164 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=214, Invalid=716, Unknown=0, NotChecked=0, Total=930 [2024-11-28 04:51:23,079 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 57 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:23,080 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 367 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 04:51:23,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2024-11-28 04:51:23,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 300. [2024-11-28 04:51:23,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 158 states have (on average 1.2911392405063291) internal successors, (204), 159 states have internal predecessors, (204), 121 states have call successors, (121), 20 states have call predecessors, (121), 20 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2024-11-28 04:51:23,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 445 transitions. [2024-11-28 04:51:23,429 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 445 transitions. Word has length 84 [2024-11-28 04:51:23,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:23,429 INFO L471 AbstractCegarLoop]: Abstraction has 300 states and 445 transitions. [2024-11-28 04:51:23,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-11-28 04:51:23,429 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 445 transitions. [2024-11-28 04:51:23,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-28 04:51:23,431 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:23,431 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:51:23,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 04:51:23,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 04:51:23,632 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:23,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:23,632 INFO L85 PathProgramCache]: Analyzing trace with hash 943756587, now seen corresponding path program 1 times [2024-11-28 04:51:23,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:51:23,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445175296] [2024-11-28 04:51:23,633 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:23,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:51:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:51:23,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1355567506] [2024-11-28 04:51:23,661 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:51:23,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:23,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:23,668 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:23,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 04:51:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:51:23,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 04:51:23,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 28 proven. 16 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2024-11-28 04:51:23,882 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:24,018 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2024-11-28 04:51:24,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:51:24,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445175296] [2024-11-28 04:51:24,019 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:51:24,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355567506] [2024-11-28 04:51:24,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355567506] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 04:51:24,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:51:24,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2024-11-28 04:51:24,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642501015] [2024-11-28 04:51:24,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:51:24,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:51:24,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:51:24,020 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:51:24,020 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-28 04:51:24,021 INFO L87 Difference]: Start difference. First operand 300 states and 445 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-28 04:51:24,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:24,367 INFO L93 Difference]: Finished difference Result 310 states and 453 transitions. [2024-11-28 04:51:24,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:51:24,368 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 92 [2024-11-28 04:51:24,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:24,371 INFO L225 Difference]: With dead ends: 310 [2024-11-28 04:51:24,371 INFO L226 Difference]: Without dead ends: 308 [2024-11-28 04:51:24,372 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:51:24,372 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:24,372 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 116 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:51:24,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2024-11-28 04:51:24,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2024-11-28 04:51:24,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 164 states have (on average 1.2804878048780488) internal successors, (210), 165 states have internal predecessors, (210), 121 states have call successors, (121), 22 states have call predecessors, (121), 22 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2024-11-28 04:51:24,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 451 transitions. [2024-11-28 04:51:24,676 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 451 transitions. Word has length 92 [2024-11-28 04:51:24,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:24,677 INFO L471 AbstractCegarLoop]: Abstraction has 308 states and 451 transitions. [2024-11-28 04:51:24,677 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2024-11-28 04:51:24,677 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 451 transitions. [2024-11-28 04:51:24,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-11-28 04:51:24,679 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:24,679 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:51:24,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-28 04:51:24,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-28 04:51:24,880 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:24,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:24,880 INFO L85 PathProgramCache]: Analyzing trace with hash -341300858, now seen corresponding path program 2 times [2024-11-28 04:51:24,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:51:24,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828344640] [2024-11-28 04:51:24,881 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:51:24,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:51:24,926 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:51:24,927 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:51:24,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [600668791] [2024-11-28 04:51:24,928 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:51:24,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:24,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:24,933 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:24,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 04:51:25,022 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:51:25,023 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:51:25,025 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-28 04:51:25,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:26,287 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2024-11-28 04:51:26,287 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:27,193 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-11-28 04:51:27,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:51:27,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828344640] [2024-11-28 04:51:27,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:51:27,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600668791] [2024-11-28 04:51:27,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600668791] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:51:27,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:51:27,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2024-11-28 04:51:27,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035446461] [2024-11-28 04:51:27,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:27,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 04:51:27,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:51:27,195 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 04:51:27,196 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2024-11-28 04:51:27,196 INFO L87 Difference]: Start difference. First operand 308 states and 451 transitions. Second operand has 29 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 26 states have internal predecessors, (41), 9 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 8 states have call predecessors, (29), 7 states have call successors, (29) [2024-11-28 04:51:42,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:42,244 INFO L93 Difference]: Finished difference Result 660 states and 989 transitions. [2024-11-28 04:51:42,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-11-28 04:51:42,244 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 26 states have internal predecessors, (41), 9 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 8 states have call predecessors, (29), 7 states have call successors, (29) Word has length 99 [2024-11-28 04:51:42,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:42,248 INFO L225 Difference]: With dead ends: 660 [2024-11-28 04:51:42,248 INFO L226 Difference]: Without dead ends: 499 [2024-11-28 04:51:42,251 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2232 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=1474, Invalid=6536, Unknown=0, NotChecked=0, Total=8010 [2024-11-28 04:51:42,252 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 188 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:42,252 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 470 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-11-28 04:51:42,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2024-11-28 04:51:42,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 423. [2024-11-28 04:51:42,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 214 states have (on average 1.3037383177570094) internal successors, (279), 215 states have internal predecessors, (279), 181 states have call successors, (181), 27 states have call predecessors, (181), 27 states have return successors, (180), 180 states have call predecessors, (180), 180 states have call successors, (180) [2024-11-28 04:51:42,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 640 transitions. [2024-11-28 04:51:42,831 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 640 transitions. Word has length 99 [2024-11-28 04:51:42,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:42,831 INFO L471 AbstractCegarLoop]: Abstraction has 423 states and 640 transitions. [2024-11-28 04:51:42,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 26 states have internal predecessors, (41), 9 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 8 states have call predecessors, (29), 7 states have call successors, (29) [2024-11-28 04:51:42,832 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 640 transitions. [2024-11-28 04:51:42,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-11-28 04:51:42,835 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:42,835 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:51:42,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-28 04:51:43,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 04:51:43,036 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:43,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:43,036 INFO L85 PathProgramCache]: Analyzing trace with hash 902042901, now seen corresponding path program 2 times [2024-11-28 04:51:43,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:51:43,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003409428] [2024-11-28 04:51:43,036 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:51:43,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:51:43,074 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:51:43,075 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:51:43,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668481399] [2024-11-28 04:51:43,076 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:51:43,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:43,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:43,081 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:43,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 04:51:43,188 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:51:43,188 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:51:43,191 INFO L256 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-28 04:51:43,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 90 proven. 47 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2024-11-28 04:51:45,556 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:45,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:51:45,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003409428] [2024-11-28 04:51:45,734 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:51:45,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668481399] [2024-11-28 04:51:45,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668481399] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:51:45,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:51:45,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-11-28 04:51:45,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336952700] [2024-11-28 04:51:45,734 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:45,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 04:51:45,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:51:45,735 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 04:51:45,736 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2024-11-28 04:51:45,736 INFO L87 Difference]: Start difference. First operand 423 states and 640 transitions. Second operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2024-11-28 04:51:48,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:51:48,351 INFO L93 Difference]: Finished difference Result 500 states and 742 transitions. [2024-11-28 04:51:48,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 04:51:48,352 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) Word has length 108 [2024-11-28 04:51:48,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:51:48,356 INFO L225 Difference]: With dead ends: 500 [2024-11-28 04:51:48,356 INFO L226 Difference]: Without dead ends: 498 [2024-11-28 04:51:48,357 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 04:51:48,358 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 72 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 1167 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-28 04:51:48,358 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 387 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1167 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-28 04:51:48,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2024-11-28 04:51:48,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 482. [2024-11-28 04:51:48,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 243 states have (on average 1.2962962962962963) internal successors, (315), 244 states have internal predecessors, (315), 205 states have call successors, (205), 33 states have call predecessors, (205), 33 states have return successors, (204), 204 states have call predecessors, (204), 204 states have call successors, (204) [2024-11-28 04:51:48,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 724 transitions. [2024-11-28 04:51:48,943 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 724 transitions. Word has length 108 [2024-11-28 04:51:48,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:51:48,944 INFO L471 AbstractCegarLoop]: Abstraction has 482 states and 724 transitions. [2024-11-28 04:51:48,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 21 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2024-11-28 04:51:48,944 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 724 transitions. [2024-11-28 04:51:48,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-28 04:51:48,947 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:51:48,947 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:51:48,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-28 04:51:49,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 04:51:49,152 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:51:49,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:51:49,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1493813819, now seen corresponding path program 3 times [2024-11-28 04:51:49,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:51:49,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690070220] [2024-11-28 04:51:49,153 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:51:49,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:51:49,238 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-28 04:51:49,238 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:51:49,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [65515711] [2024-11-28 04:51:49,242 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:51:49,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:51:49,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:51:49,244 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:51:49,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 04:51:49,380 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 04:51:49,380 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:51:49,382 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-28 04:51:49,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:51:51,343 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 61 proven. 46 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-11-28 04:51:51,343 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:51:54,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:51:54,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690070220] [2024-11-28 04:51:54,883 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:51:54,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65515711] [2024-11-28 04:51:54,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65515711] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:51:54,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:51:54,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-11-28 04:51:54,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849151888] [2024-11-28 04:51:54,883 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:51:54,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 04:51:54,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:51:54,884 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 04:51:54,885 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2024-11-28 04:51:54,885 INFO L87 Difference]: Start difference. First operand 482 states and 724 transitions. Second operand has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2024-11-28 04:52:01,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:01,549 INFO L93 Difference]: Finished difference Result 620 states and 940 transitions. [2024-11-28 04:52:01,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-28 04:52:01,550 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) Word has length 111 [2024-11-28 04:52:01,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:01,553 INFO L225 Difference]: With dead ends: 620 [2024-11-28 04:52:01,553 INFO L226 Difference]: Without dead ends: 618 [2024-11-28 04:52:01,554 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2024-11-28 04:52:01,554 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 60 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:01,554 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 576 Invalid, 945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-11-28 04:52:01,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2024-11-28 04:52:02,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 600. [2024-11-28 04:52:02,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 291 states have (on average 1.3161512027491409) internal successors, (383), 292 states have internal predecessors, (383), 269 states have call successors, (269), 39 states have call predecessors, (269), 39 states have return successors, (268), 268 states have call predecessors, (268), 268 states have call successors, (268) [2024-11-28 04:52:02,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 920 transitions. [2024-11-28 04:52:02,511 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 920 transitions. Word has length 111 [2024-11-28 04:52:02,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:02,511 INFO L471 AbstractCegarLoop]: Abstraction has 600 states and 920 transitions. [2024-11-28 04:52:02,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 5 states have call predecessors, (17), 5 states have call successors, (17) [2024-11-28 04:52:02,511 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 920 transitions. [2024-11-28 04:52:02,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-28 04:52:02,515 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:02,515 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:02,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 04:52:02,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 04:52:02,720 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:52:02,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:02,720 INFO L85 PathProgramCache]: Analyzing trace with hash 139734743, now seen corresponding path program 3 times [2024-11-28 04:52:02,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:52:02,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392643056] [2024-11-28 04:52:02,721 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:52:02,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:52:02,753 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 04:52:02,753 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:52:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 56 proven. 15 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2024-11-28 04:52:02,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:52:02,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392643056] [2024-11-28 04:52:02,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392643056] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:52:02,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945247365] [2024-11-28 04:52:02,897 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 04:52:02,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:02,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:02,899 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:02,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 04:52:02,993 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 04:52:02,993 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:52:02,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 04:52:02,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:03,137 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 39 proven. 32 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2024-11-28 04:52:03,137 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:03,340 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 39 proven. 32 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2024-11-28 04:52:03,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945247365] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:52:03,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:52:03,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 12 [2024-11-28 04:52:03,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280660480] [2024-11-28 04:52:03,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:03,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:52:03,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:52:03,342 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:52:03,342 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:52:03,342 INFO L87 Difference]: Start difference. First operand 600 states and 920 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2024-11-28 04:52:04,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:04,617 INFO L93 Difference]: Finished difference Result 1106 states and 1731 transitions. [2024-11-28 04:52:04,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 04:52:04,618 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) Word has length 123 [2024-11-28 04:52:04,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:04,625 INFO L225 Difference]: With dead ends: 1106 [2024-11-28 04:52:04,625 INFO L226 Difference]: Without dead ends: 752 [2024-11-28 04:52:04,627 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 234 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-28 04:52:04,628 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 3 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:04,628 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 312 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:52:04,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2024-11-28 04:52:05,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 699. [2024-11-28 04:52:05,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 324 states have (on average 1.3364197530864197) internal successors, (433), 337 states have internal predecessors, (433), 335 states have call successors, (335), 39 states have call predecessors, (335), 39 states have return successors, (334), 322 states have call predecessors, (334), 334 states have call successors, (334) [2024-11-28 04:52:05,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1102 transitions. [2024-11-28 04:52:05,742 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1102 transitions. Word has length 123 [2024-11-28 04:52:05,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:05,742 INFO L471 AbstractCegarLoop]: Abstraction has 699 states and 1102 transitions. [2024-11-28 04:52:05,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 7 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (28), 7 states have call predecessors, (28), 7 states have call successors, (28) [2024-11-28 04:52:05,749 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1102 transitions. [2024-11-28 04:52:05,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-28 04:52:05,752 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:05,752 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:05,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 04:52:05,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:05,953 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:52:05,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:05,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1037427739, now seen corresponding path program 4 times [2024-11-28 04:52:05,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:52:05,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805632445] [2024-11-28 04:52:05,954 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:52:05,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:52:05,991 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:52:05,991 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:52:05,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [883791961] [2024-11-28 04:52:05,993 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:52:05,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:05,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:05,996 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:06,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 04:52:06,120 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:52:06,120 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:52:06,123 INFO L256 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-28 04:52:06,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:07,605 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 38 proven. 44 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-11-28 04:52:07,605 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:09,377 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 32 proven. 41 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-11-28 04:52:09,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:52:09,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805632445] [2024-11-28 04:52:09,378 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:52:09,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883791961] [2024-11-28 04:52:09,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883791961] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:52:09,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:52:09,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2024-11-28 04:52:09,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353473587] [2024-11-28 04:52:09,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:09,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-28 04:52:09,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:52:09,380 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-28 04:52:09,380 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1020, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 04:52:09,380 INFO L87 Difference]: Start difference. First operand 699 states and 1102 transitions. Second operand has 35 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 32 states have internal predecessors, (49), 12 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) [2024-11-28 04:52:16,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:52:43,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:52:43,051 INFO L93 Difference]: Finished difference Result 1157 states and 1890 transitions. [2024-11-28 04:52:43,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2024-11-28 04:52:43,052 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 32 states have internal predecessors, (49), 12 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) Word has length 123 [2024-11-28 04:52:43,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:52:43,061 INFO L225 Difference]: With dead ends: 1157 [2024-11-28 04:52:43,061 INFO L226 Difference]: Without dead ends: 1149 [2024-11-28 04:52:43,066 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4643 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=2709, Invalid=13041, Unknown=0, NotChecked=0, Total=15750 [2024-11-28 04:52:43,067 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 286 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 1984 mSolverCounterSat, 403 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 2388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 1984 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2024-11-28 04:52:43,068 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 1006 Invalid, 2388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 1984 Invalid, 1 Unknown, 0 Unchecked, 10.9s Time] [2024-11-28 04:52:43,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2024-11-28 04:52:44,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 873. [2024-11-28 04:52:44,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 393 states have (on average 1.3638676844783715) internal successors, (536), 408 states have internal predecessors, (536), 435 states have call successors, (435), 44 states have call predecessors, (435), 44 states have return successors, (434), 420 states have call predecessors, (434), 434 states have call successors, (434) [2024-11-28 04:52:44,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1405 transitions. [2024-11-28 04:52:44,664 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1405 transitions. Word has length 123 [2024-11-28 04:52:44,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:52:44,665 INFO L471 AbstractCegarLoop]: Abstraction has 873 states and 1405 transitions. [2024-11-28 04:52:44,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 32 states have internal predecessors, (49), 12 states have call successors, (39), 3 states have call predecessors, (39), 2 states have return successors, (38), 10 states have call predecessors, (38), 10 states have call successors, (38) [2024-11-28 04:52:44,665 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1405 transitions. [2024-11-28 04:52:44,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-28 04:52:44,669 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:52:44,669 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:52:44,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-28 04:52:44,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-11-28 04:52:44,870 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:52:44,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:52:44,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1759688953, now seen corresponding path program 5 times [2024-11-28 04:52:44,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:52:44,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846159373] [2024-11-28 04:52:44,871 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:52:44,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:52:44,915 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-11-28 04:52:44,915 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:52:44,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [763640459] [2024-11-28 04:52:44,917 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:52:44,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:52:44,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:52:44,922 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:52:44,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 04:52:45,063 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-11-28 04:52:45,063 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:52:45,065 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-28 04:52:45,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:52:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 64 proven. 54 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2024-11-28 04:52:46,691 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:52:48,706 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 64 proven. 54 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2024-11-28 04:52:48,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:52:48,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846159373] [2024-11-28 04:52:48,707 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:52:48,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763640459] [2024-11-28 04:52:48,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763640459] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:52:48,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:52:48,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2024-11-28 04:52:48,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792151340] [2024-11-28 04:52:48,707 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:52:48,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-28 04:52:48,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:52:48,709 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-28 04:52:48,709 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2024-11-28 04:52:48,710 INFO L87 Difference]: Start difference. First operand 873 states and 1405 transitions. Second operand has 33 states, 30 states have (on average 1.7) internal successors, (51), 31 states have internal predecessors, (51), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 10 states have call predecessors, (36), 9 states have call successors, (36) [2024-11-28 04:53:23,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:53:58,719 WARN L286 SmtUtils]: Spent 6.62s on a formula simplification. DAG size of input: 95 DAG size of output: 92 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 04:54:00,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:00,859 INFO L93 Difference]: Finished difference Result 1516 states and 2540 transitions. [2024-11-28 04:54:00,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2024-11-28 04:54:00,860 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 1.7) internal successors, (51), 31 states have internal predecessors, (51), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 10 states have call predecessors, (36), 9 states have call successors, (36) Word has length 123 [2024-11-28 04:54:00,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:00,868 INFO L225 Difference]: With dead ends: 1516 [2024-11-28 04:54:00,868 INFO L226 Difference]: Without dead ends: 1508 [2024-11-28 04:54:00,873 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5660 ImplicationChecksByTransitivity, 50.3s TimeCoverageRelationStatistics Valid=2705, Invalid=15927, Unknown=0, NotChecked=0, Total=18632 [2024-11-28 04:54:00,875 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 212 mSDsluCounter, 1181 mSDsCounter, 0 mSdLazyCounter, 2362 mSolverCounterSat, 397 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 2760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 2362 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:00,875 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1244 Invalid, 2760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 2362 Invalid, 1 Unknown, 0 Unchecked, 20.6s Time] [2024-11-28 04:54:00,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1508 states. [2024-11-28 04:54:02,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1508 to 1026. [2024-11-28 04:54:02,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 459 states have (on average 1.381263616557734) internal successors, (634), 474 states have internal predecessors, (634), 521 states have call successors, (521), 45 states have call predecessors, (521), 45 states have return successors, (520), 506 states have call predecessors, (520), 520 states have call successors, (520) [2024-11-28 04:54:02,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1675 transitions. [2024-11-28 04:54:02,951 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1675 transitions. Word has length 123 [2024-11-28 04:54:02,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:02,952 INFO L471 AbstractCegarLoop]: Abstraction has 1026 states and 1675 transitions. [2024-11-28 04:54:02,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 1.7) internal successors, (51), 31 states have internal predecessors, (51), 11 states have call successors, (38), 3 states have call predecessors, (38), 2 states have return successors, (36), 10 states have call predecessors, (36), 9 states have call successors, (36) [2024-11-28 04:54:02,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1675 transitions. [2024-11-28 04:54:02,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2024-11-28 04:54:02,955 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:02,955 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:54:02,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-28 04:54:03,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:03,157 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:54:03,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:03,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1379479472, now seen corresponding path program 6 times [2024-11-28 04:54:03,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:54:03,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78766427] [2024-11-28 04:54:03,158 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:54:03,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:54:03,239 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-11-28 04:54:03,242 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:54:03,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1013442833] [2024-11-28 04:54:03,244 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:54:03,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:03,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:03,246 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:03,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 04:54:03,353 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-28 04:54:03,353 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:54:03,360 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-11-28 04:54:03,365 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:04,908 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 32 proven. 47 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-11-28 04:54:04,908 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:06,946 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 32 proven. 47 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-11-28 04:54:06,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:54:06,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78766427] [2024-11-28 04:54:06,947 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:54:06,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013442833] [2024-11-28 04:54:06,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013442833] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:54:06,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:54:06,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2024-11-28 04:54:06,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483988048] [2024-11-28 04:54:06,947 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:54:06,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 04:54:06,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:54:06,953 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 04:54:06,953 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2024-11-28 04:54:06,954 INFO L87 Difference]: Start difference. First operand 1026 states and 1675 transitions. Second operand has 32 states, 30 states have (on average 1.6) internal successors, (48), 31 states have internal predecessors, (48), 11 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) [2024-11-28 04:54:35,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:54:35,749 INFO L93 Difference]: Finished difference Result 1374 states and 2250 transitions. [2024-11-28 04:54:35,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2024-11-28 04:54:35,750 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.6) internal successors, (48), 31 states have internal predecessors, (48), 11 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) Word has length 125 [2024-11-28 04:54:35,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:54:35,760 INFO L225 Difference]: With dead ends: 1374 [2024-11-28 04:54:35,760 INFO L226 Difference]: Without dead ends: 1370 [2024-11-28 04:54:35,763 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 216 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4366 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=2498, Invalid=11782, Unknown=0, NotChecked=0, Total=14280 [2024-11-28 04:54:35,764 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 254 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 1892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:54:35,765 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 838 Invalid, 1892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 1510 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2024-11-28 04:54:35,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2024-11-28 04:54:38,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1136. [2024-11-28 04:54:38,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 508 states have (on average 1.3838582677165354) internal successors, (703), 530 states have internal predecessors, (703), 578 states have call successors, (578), 49 states have call predecessors, (578), 49 states have return successors, (577), 556 states have call predecessors, (577), 577 states have call successors, (577) [2024-11-28 04:54:38,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 1858 transitions. [2024-11-28 04:54:38,172 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 1858 transitions. Word has length 125 [2024-11-28 04:54:38,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:54:38,173 INFO L471 AbstractCegarLoop]: Abstraction has 1136 states and 1858 transitions. [2024-11-28 04:54:38,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 1.6) internal successors, (48), 31 states have internal predecessors, (48), 11 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 9 states have call predecessors, (36), 9 states have call successors, (36) [2024-11-28 04:54:38,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 1858 transitions. [2024-11-28 04:54:38,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-28 04:54:38,177 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:54:38,177 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1] [2024-11-28 04:54:38,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-28 04:54:38,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:38,382 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:54:38,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:54:38,382 INFO L85 PathProgramCache]: Analyzing trace with hash 218465076, now seen corresponding path program 7 times [2024-11-28 04:54:38,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:54:38,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647684985] [2024-11-28 04:54:38,382 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:54:38,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:54:38,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:54:38,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [866357262] [2024-11-28 04:54:38,425 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:54:38,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:54:38,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:54:38,430 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:54:38,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 04:54:38,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:54:38,600 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-11-28 04:54:38,608 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:54:41,034 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 76 proven. 67 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2024-11-28 04:54:41,034 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:54:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 70 proven. 64 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2024-11-28 04:54:44,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:54:44,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647684985] [2024-11-28 04:54:44,573 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:54:44,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866357262] [2024-11-28 04:54:44,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866357262] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:54:44,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:54:44,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23] total 46 [2024-11-28 04:54:44,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603292097] [2024-11-28 04:54:44,574 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:54:44,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-28 04:54:44,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:54:44,575 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-28 04:54:44,575 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1719, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 04:54:44,576 INFO L87 Difference]: Start difference. First operand 1136 states and 1858 transitions. Second operand has 46 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 44 states have internal predecessors, (64), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2024-11-28 04:55:00,381 WARN L286 SmtUtils]: Spent 7.91s on a formula simplification that was a NOOP. DAG size: 159 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 04:55:08,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:55:15,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:55:25,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 9.41s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:55:27,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:55:31,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:55:44,671 WARN L286 SmtUtils]: Spent 10.23s on a formula simplification that was a NOOP. DAG size: 158 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 04:55:47,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:55:51,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:55:59,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:56:03,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:56:12,116 WARN L286 SmtUtils]: Spent 5.12s on a formula simplification that was a NOOP. DAG size: 164 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 04:56:18,944 WARN L286 SmtUtils]: Spent 5.66s on a formula simplification that was a NOOP. DAG size: 170 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 04:56:20,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:56:23,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:56:24,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:56:28,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:56:41,397 WARN L286 SmtUtils]: Spent 10.58s on a formula simplification that was a NOOP. DAG size: 163 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 04:56:55,292 WARN L286 SmtUtils]: Spent 9.99s on a formula simplification that was a NOOP. DAG size: 160 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 04:57:01,507 WARN L286 SmtUtils]: Spent 5.29s on a formula simplification that was a NOOP. DAG size: 160 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 04:57:08,037 WARN L286 SmtUtils]: Spent 5.37s on a formula simplification that was a NOOP. DAG size: 166 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 04:57:10,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:57:22,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:57:26,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:57:31,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:57:35,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:57:37,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:57:37,591 INFO L93 Difference]: Finished difference Result 1333 states and 2150 transitions. [2024-11-28 04:57:37,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-11-28 04:57:37,592 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 44 states have internal predecessors, (64), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) Word has length 128 [2024-11-28 04:57:37,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:57:37,598 INFO L225 Difference]: With dead ends: 1333 [2024-11-28 04:57:37,599 INFO L226 Difference]: Without dead ends: 1329 [2024-11-28 04:57:37,600 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2830 ImplicationChecksByTransitivity, 96.5s TimeCoverageRelationStatistics Valid=2307, Invalid=9035, Unknown=0, NotChecked=0, Total=11342 [2024-11-28 04:57:37,601 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 330 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 1873 mSolverCounterSat, 657 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 2541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 657 IncrementalHoareTripleChecker+Valid, 1873 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.4s IncrementalHoareTripleChecker+Time [2024-11-28 04:57:37,601 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 818 Invalid, 2541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [657 Valid, 1873 Invalid, 11 Unknown, 0 Unchecked, 75.4s Time] [2024-11-28 04:57:37,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2024-11-28 04:57:41,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 1234. [2024-11-28 04:57:41,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 557 states have (on average 1.3806104129263914) internal successors, (769), 581 states have internal predecessors, (769), 620 states have call successors, (620), 56 states have call predecessors, (620), 56 states have return successors, (619), 596 states have call predecessors, (619), 619 states have call successors, (619) [2024-11-28 04:57:41,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 2008 transitions. [2024-11-28 04:57:41,037 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 2008 transitions. Word has length 128 [2024-11-28 04:57:41,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:57:41,037 INFO L471 AbstractCegarLoop]: Abstraction has 1234 states and 2008 transitions. [2024-11-28 04:57:41,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 44 states have internal predecessors, (64), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2024-11-28 04:57:41,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 2008 transitions. [2024-11-28 04:57:41,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-11-28 04:57:41,041 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:57:41,041 INFO L218 NwaCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:57:41,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-28 04:57:41,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:57:41,242 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:57:41,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:57:41,243 INFO L85 PathProgramCache]: Analyzing trace with hash -129990768, now seen corresponding path program 4 times [2024-11-28 04:57:41,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:57:41,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977243336] [2024-11-28 04:57:41,243 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:57:41,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:57:41,273 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:57:41,274 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:57:41,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [761841995] [2024-11-28 04:57:41,275 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 04:57:41,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:57:41,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:57:41,279 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:57:41,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 04:57:41,410 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 04:57:41,411 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:57:41,413 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-28 04:57:41,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:57:42,594 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 34 proven. 53 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2024-11-28 04:57:42,594 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:57:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 34 proven. 53 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2024-11-28 04:57:44,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:57:44,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977243336] [2024-11-28 04:57:44,158 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:57:44,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761841995] [2024-11-28 04:57:44,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761841995] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:57:44,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:57:44,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2024-11-28 04:57:44,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023547760] [2024-11-28 04:57:44,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:57:44,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 04:57:44,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:57:44,160 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 04:57:44,161 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2024-11-28 04:57:44,161 INFO L87 Difference]: Start difference. First operand 1234 states and 2008 transitions. Second operand has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 29 states have internal predecessors, (46), 11 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2024-11-28 04:57:56,952 WARN L286 SmtUtils]: Spent 5.02s on a formula simplification. DAG size of input: 115 DAG size of output: 64 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 04:58:13,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:58:42,994 WARN L286 SmtUtils]: Spent 6.17s on a formula simplification. DAG size of input: 135 DAG size of output: 127 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 04:58:49,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:58:49,150 INFO L93 Difference]: Finished difference Result 1703 states and 2800 transitions. [2024-11-28 04:58:49,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-11-28 04:58:49,151 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 29 states have internal predecessors, (46), 11 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) Word has length 129 [2024-11-28 04:58:49,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:58:49,159 INFO L225 Difference]: With dead ends: 1703 [2024-11-28 04:58:49,159 INFO L226 Difference]: Without dead ends: 1701 [2024-11-28 04:58:49,161 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 226 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3382 ImplicationChecksByTransitivity, 47.3s TimeCoverageRelationStatistics Valid=2309, Invalid=9033, Unknown=0, NotChecked=0, Total=11342 [2024-11-28 04:58:49,162 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 252 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 1560 mSolverCounterSat, 341 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 1902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 1560 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:58:49,162 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 826 Invalid, 1902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 1560 Invalid, 1 Unknown, 0 Unchecked, 13.1s Time] [2024-11-28 04:58:49,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2024-11-28 04:58:54,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1515. [2024-11-28 04:58:54,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 676 states have (on average 1.3979289940828403) internal successors, (945), 704 states have internal predecessors, (945), 776 states have call successors, (776), 62 states have call predecessors, (776), 62 states have return successors, (775), 748 states have call predecessors, (775), 775 states have call successors, (775) [2024-11-28 04:58:54,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 2496 transitions. [2024-11-28 04:58:54,404 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 2496 transitions. Word has length 129 [2024-11-28 04:58:54,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:58:54,404 INFO L471 AbstractCegarLoop]: Abstraction has 1515 states and 2496 transitions. [2024-11-28 04:58:54,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5333333333333334) internal successors, (46), 29 states have internal predecessors, (46), 11 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2024-11-28 04:58:54,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 2496 transitions. [2024-11-28 04:58:54,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-11-28 04:58:54,408 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:58:54,408 INFO L218 NwaCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:58:54,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-28 04:58:54,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:58:54,609 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:58:54,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:58:54,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1511244036, now seen corresponding path program 5 times [2024-11-28 04:58:54,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:58:54,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543027956] [2024-11-28 04:58:54,609 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:58:54,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:58:54,661 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-11-28 04:58:54,662 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:58:54,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1528168822] [2024-11-28 04:58:54,663 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 04:58:54,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:58:54,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:58:54,666 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:58:54,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 04:58:55,140 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-11-28 04:58:55,140 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:58:55,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-11-28 04:58:55,145 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:58:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 68 proven. 109 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2024-11-28 04:58:56,963 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:58:57,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:58:57,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543027956] [2024-11-28 04:58:57,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:58:57,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528168822] [2024-11-28 04:58:57,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528168822] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:58:57,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:58:57,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-11-28 04:58:57,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375332950] [2024-11-28 04:58:57,843 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 04:58:57,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 04:58:57,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:58:57,844 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 04:58:57,844 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2024-11-28 04:58:57,844 INFO L87 Difference]: Start difference. First operand 1515 states and 2496 transitions. Second operand has 21 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2024-11-28 04:59:04,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:59:04,683 INFO L93 Difference]: Finished difference Result 1649 states and 2693 transitions. [2024-11-28 04:59:04,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 04:59:04,684 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 129 [2024-11-28 04:59:04,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:59:04,691 INFO L225 Difference]: With dead ends: 1649 [2024-11-28 04:59:04,691 INFO L226 Difference]: Without dead ends: 1647 [2024-11-28 04:59:04,692 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=185, Invalid=1147, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 04:59:04,692 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 56 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:59:04,692 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 651 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-28 04:59:04,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2024-11-28 04:59:09,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1621. [2024-11-28 04:59:09,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 726 states have (on average 1.393939393939394) internal successors, (1012), 756 states have internal predecessors, (1012), 824 states have call successors, (824), 70 states have call predecessors, (824), 70 states have return successors, (823), 794 states have call predecessors, (823), 823 states have call successors, (823) [2024-11-28 04:59:09,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 2659 transitions. [2024-11-28 04:59:09,737 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 2659 transitions. Word has length 129 [2024-11-28 04:59:09,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:59:09,737 INFO L471 AbstractCegarLoop]: Abstraction has 1621 states and 2659 transitions. [2024-11-28 04:59:09,738 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2024-11-28 04:59:09,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 2659 transitions. [2024-11-28 04:59:09,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-28 04:59:09,742 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:59:09,742 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:59:09,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 04:59:09,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:59:09,943 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:59:09,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:59:09,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1732774533, now seen corresponding path program 6 times [2024-11-28 04:59:09,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:59:09,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182972608] [2024-11-28 04:59:09,943 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:59:09,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:59:09,985 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-11-28 04:59:09,985 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 04:59:09,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [102587017] [2024-11-28 04:59:09,987 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-28 04:59:09,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:59:09,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:59:09,990 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:59:09,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 04:59:10,079 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-11-28 04:59:10,080 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:59:10,086 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 04:59:10,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:59:10,480 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 97 proven. 43 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2024-11-28 04:59:10,480 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:59:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 105 proven. 9 refuted. 0 times theorem prover too weak. 615 trivial. 0 not checked. [2024-11-28 04:59:10,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:59:10,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182972608] [2024-11-28 04:59:10,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:59:10,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102587017] [2024-11-28 04:59:10,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102587017] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:59:10,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:59:10,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 21 [2024-11-28 04:59:10,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061223281] [2024-11-28 04:59:10,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:59:10,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 04:59:10,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:59:10,725 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 04:59:10,726 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2024-11-28 04:59:10,727 INFO L87 Difference]: Start difference. First operand 1621 states and 2659 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 5 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (25), 7 states have call predecessors, (25), 5 states have call successors, (25) [2024-11-28 04:59:16,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:59:16,902 INFO L93 Difference]: Finished difference Result 1759 states and 2853 transitions. [2024-11-28 04:59:16,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 04:59:16,903 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 5 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (25), 7 states have call predecessors, (25), 5 states have call successors, (25) Word has length 134 [2024-11-28 04:59:16,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:59:16,910 INFO L225 Difference]: With dead ends: 1759 [2024-11-28 04:59:16,910 INFO L226 Difference]: Without dead ends: 1757 [2024-11-28 04:59:16,911 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=267, Invalid=1373, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 04:59:16,911 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 38 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 04:59:16,912 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 329 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 04:59:16,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1757 states. [2024-11-28 04:59:21,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1757 to 1644. [2024-11-28 04:59:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1644 states, 744 states have (on average 1.3844086021505377) internal successors, (1030), 774 states have internal predecessors, (1030), 823 states have call successors, (823), 76 states have call predecessors, (823), 76 states have return successors, (822), 793 states have call predecessors, (822), 822 states have call successors, (822) [2024-11-28 04:59:21,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1644 states to 1644 states and 2675 transitions. [2024-11-28 04:59:21,963 INFO L78 Accepts]: Start accepts. Automaton has 1644 states and 2675 transitions. Word has length 134 [2024-11-28 04:59:21,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:59:21,964 INFO L471 AbstractCegarLoop]: Abstraction has 1644 states and 2675 transitions. [2024-11-28 04:59:21,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 5 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (25), 7 states have call predecessors, (25), 5 states have call successors, (25) [2024-11-28 04:59:21,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1644 states and 2675 transitions. [2024-11-28 04:59:21,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-28 04:59:21,967 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:59:21,968 INFO L218 NwaCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:59:21,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-28 04:59:22,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:59:22,172 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:59:22,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:59:22,172 INFO L85 PathProgramCache]: Analyzing trace with hash 755980737, now seen corresponding path program 7 times [2024-11-28 04:59:22,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:59:22,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18554362] [2024-11-28 04:59:22,172 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:59:22,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:59:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 04:59:22,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1580441546] [2024-11-28 04:59:22,202 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-28 04:59:22,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:59:22,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:59:22,209 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:59:22,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 04:59:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:59:22,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-11-28 04:59:22,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:59:24,307 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 78 proven. 84 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2024-11-28 04:59:24,307 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:59:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 84 proven. 69 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2024-11-28 04:59:29,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:59:29,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18554362] [2024-11-28 04:59:29,345 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 04:59:29,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580441546] [2024-11-28 04:59:29,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580441546] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:59:29,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:59:29,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22] total 46 [2024-11-28 04:59:29,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096367270] [2024-11-28 04:59:29,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:59:29,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-28 04:59:29,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:59:29,346 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-28 04:59:29,347 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=1718, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 04:59:29,347 INFO L87 Difference]: Start difference. First operand 1644 states and 2675 transitions. Second operand has 46 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 14 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2024-11-28 04:59:33,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 04:59:40,594 WARN L286 SmtUtils]: Spent 5.33s on a formula simplification that was a NOOP. DAG size: 140 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 05:00:03,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 05:00:14,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:00:14,257 INFO L93 Difference]: Finished difference Result 1885 states and 3020 transitions. [2024-11-28 05:00:14,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-11-28 05:00:14,257 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 14 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) Word has length 134 [2024-11-28 05:00:14,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:00:14,265 INFO L225 Difference]: With dead ends: 1885 [2024-11-28 05:00:14,265 INFO L226 Difference]: Without dead ends: 1883 [2024-11-28 05:00:14,267 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3628 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=2491, Invalid=11315, Unknown=0, NotChecked=0, Total=13806 [2024-11-28 05:00:14,267 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 300 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 1812 mSolverCounterSat, 488 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 2300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 488 IncrementalHoareTripleChecker+Valid, 1812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2024-11-28 05:00:14,268 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 782 Invalid, 2300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [488 Valid, 1812 Invalid, 0 Unknown, 0 Unchecked, 12.8s Time] [2024-11-28 05:00:14,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2024-11-28 05:00:19,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1767. [2024-11-28 05:00:19,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1767 states, 811 states have (on average 1.3637484586929716) internal successors, (1106), 854 states have internal predecessors, (1106), 868 states have call successors, (868), 87 states have call predecessors, (868), 87 states have return successors, (867), 825 states have call predecessors, (867), 867 states have call successors, (867) [2024-11-28 05:00:19,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 2841 transitions. [2024-11-28 05:00:19,964 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 2841 transitions. Word has length 134 [2024-11-28 05:00:19,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:00:19,964 INFO L471 AbstractCegarLoop]: Abstraction has 1767 states and 2841 transitions. [2024-11-28 05:00:19,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 14 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2024-11-28 05:00:19,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 2841 transitions. [2024-11-28 05:00:19,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-28 05:00:19,968 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:00:19,968 INFO L218 NwaCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:00:19,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-28 05:00:20,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-28 05:00:20,172 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:00:20,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:00:20,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1045076321, now seen corresponding path program 8 times [2024-11-28 05:00:20,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:00:20,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473351407] [2024-11-28 05:00:20,172 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:00:20,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:00:20,197 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:00:20,197 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:00:20,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946556722] [2024-11-28 05:00:20,199 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:00:20,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:00:20,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:00:20,203 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:00:20,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 05:00:20,343 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:00:20,343 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:00:20,351 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-28 05:00:20,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:00:25,657 INFO L134 CoverageAnalysis]: Checked inductivity of 673 backedges. 119 proven. 85 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2024-11-28 05:00:25,657 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:00:29,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:00:29,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473351407] [2024-11-28 05:00:29,985 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:00:29,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946556722] [2024-11-28 05:00:29,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946556722] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:00:29,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:00:29,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2024-11-28 05:00:29,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131283305] [2024-11-28 05:00:29,985 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:00:29,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 05:00:29,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:00:29,986 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 05:00:29,986 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1077, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 05:00:29,986 INFO L87 Difference]: Start difference. First operand 1767 states and 2841 transitions. Second operand has 28 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 24 states have internal predecessors, (40), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2024-11-28 05:00:47,929 WARN L286 SmtUtils]: Spent 7.08s on a formula simplification. DAG size of input: 37 DAG size of output: 44 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-28 05:00:54,474 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:01:00,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:01:05,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:01:12,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:01:17,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:01:18,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-11-28 05:01:25,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:25,076 INFO L93 Difference]: Finished difference Result 1882 states and 3004 transitions. [2024-11-28 05:01:25,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 05:01:25,076 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 24 states have internal predecessors, (40), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 134 [2024-11-28 05:01:25,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:25,083 INFO L225 Difference]: With dead ends: 1882 [2024-11-28 05:01:25,083 INFO L226 Difference]: Without dead ends: 1880 [2024-11-28 05:01:25,084 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=221, Invalid=2229, Unknown=0, NotChecked=0, Total=2450 [2024-11-28 05:01:25,084 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 81 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 1604 mSolverCounterSat, 58 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 1664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1604 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:25,085 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 773 Invalid, 1664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1604 Invalid, 2 Unknown, 0 Unchecked, 35.3s Time] [2024-11-28 05:01:25,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2024-11-28 05:01:31,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1839. [2024-11-28 05:01:31,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1839 states, 846 states have (on average 1.3617021276595744) internal successors, (1152), 891 states have internal predecessors, (1152), 900 states have call successors, (900), 92 states have call predecessors, (900), 92 states have return successors, (899), 855 states have call predecessors, (899), 899 states have call successors, (899) [2024-11-28 05:01:31,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1839 states to 1839 states and 2951 transitions. [2024-11-28 05:01:31,185 INFO L78 Accepts]: Start accepts. Automaton has 1839 states and 2951 transitions. Word has length 134 [2024-11-28 05:01:31,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:31,185 INFO L471 AbstractCegarLoop]: Abstraction has 1839 states and 2951 transitions. [2024-11-28 05:01:31,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 24 states have internal predecessors, (40), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2024-11-28 05:01:31,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1839 states and 2951 transitions. [2024-11-28 05:01:31,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-28 05:01:31,189 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:31,189 INFO L218 NwaCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:31,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-28 05:01:31,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:31,390 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:01:31,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:31,390 INFO L85 PathProgramCache]: Analyzing trace with hash 278487857, now seen corresponding path program 9 times [2024-11-28 05:01:31,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:31,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980073456] [2024-11-28 05:01:31,391 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:01:31,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:31,444 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-28 05:01:31,445 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:01:31,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [878155737] [2024-11-28 05:01:31,446 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:01:31,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:31,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:31,448 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:31,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 05:01:31,719 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 05:01:31,719 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:01:31,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-11-28 05:01:31,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:01:38,419 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 113 proven. 104 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2024-11-28 05:01:38,420 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:01:38,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:38,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980073456] [2024-11-28 05:01:38,573 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:01:38,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878155737] [2024-11-28 05:01:38,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878155737] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:01:38,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:01:38,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2024-11-28 05:01:38,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229865863] [2024-11-28 05:01:38,574 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:01:38,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 05:01:38,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:38,574 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 05:01:38,574 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2024-11-28 05:01:38,575 INFO L87 Difference]: Start difference. First operand 1839 states and 2951 transitions. Second operand has 28 states, 25 states have (on average 1.72) internal successors, (43), 26 states have internal predecessors, (43), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 6 states have call predecessors, (21), 8 states have call successors, (21) [2024-11-28 05:01:48,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:01:48,401 INFO L93 Difference]: Finished difference Result 2052 states and 3259 transitions. [2024-11-28 05:01:48,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 05:01:48,401 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 1.72) internal successors, (43), 26 states have internal predecessors, (43), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 6 states have call predecessors, (21), 8 states have call successors, (21) Word has length 137 [2024-11-28 05:01:48,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:01:48,413 INFO L225 Difference]: With dead ends: 2052 [2024-11-28 05:01:48,414 INFO L226 Difference]: Without dead ends: 2050 [2024-11-28 05:01:48,415 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 05:01:48,415 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 88 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 1696 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 1774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-28 05:01:48,416 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 552 Invalid, 1774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1696 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-28 05:01:48,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2050 states. [2024-11-28 05:01:54,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2050 to 1911. [2024-11-28 05:01:54,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 885 states have (on average 1.3536723163841808) internal successors, (1198), 931 states have internal predecessors, (1198), 926 states have call successors, (926), 99 states have call predecessors, (926), 99 states have return successors, (925), 880 states have call predecessors, (925), 925 states have call successors, (925) [2024-11-28 05:01:54,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 3049 transitions. [2024-11-28 05:01:54,691 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 3049 transitions. Word has length 137 [2024-11-28 05:01:54,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:01:54,691 INFO L471 AbstractCegarLoop]: Abstraction has 1911 states and 3049 transitions. [2024-11-28 05:01:54,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 1.72) internal successors, (43), 26 states have internal predecessors, (43), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 6 states have call predecessors, (21), 8 states have call successors, (21) [2024-11-28 05:01:54,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 3049 transitions. [2024-11-28 05:01:54,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-11-28 05:01:54,693 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:01:54,693 INFO L218 NwaCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:01:54,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-28 05:01:54,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-28 05:01:54,894 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:01:54,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:01:54,894 INFO L85 PathProgramCache]: Analyzing trace with hash 2073778245, now seen corresponding path program 10 times [2024-11-28 05:01:54,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:01:54,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449297367] [2024-11-28 05:01:54,894 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:01:54,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:01:54,937 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:01:54,937 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:01:54,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [444831868] [2024-11-28 05:01:54,942 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:01:54,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:01:54,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:01:54,944 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:01:54,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 05:01:55,188 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:01:55,188 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:01:55,191 INFO L256 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-11-28 05:01:55,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:01:56,749 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 34 proven. 85 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2024-11-28 05:01:56,749 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:01:59,104 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 35 proven. 84 refuted. 0 times theorem prover too weak. 568 trivial. 0 not checked. [2024-11-28 05:01:59,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:01:59,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449297367] [2024-11-28 05:01:59,104 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:01:59,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444831868] [2024-11-28 05:01:59,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444831868] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:01:59,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:01:59,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2024-11-28 05:01:59,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631439651] [2024-11-28 05:01:59,104 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:01:59,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-28 05:01:59,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:01:59,105 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-28 05:01:59,105 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1341, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 05:01:59,106 INFO L87 Difference]: Start difference. First operand 1911 states and 3049 transitions. Second operand has 40 states, 40 states have (on average 1.55) internal successors, (62), 39 states have internal predecessors, (62), 11 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2024-11-28 05:02:33,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.81s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 05:03:18,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:03:18,664 INFO L93 Difference]: Finished difference Result 2355 states and 3734 transitions. [2024-11-28 05:03:18,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2024-11-28 05:03:18,664 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.55) internal successors, (62), 39 states have internal predecessors, (62), 11 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) Word has length 137 [2024-11-28 05:03:18,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:03:18,678 INFO L225 Difference]: With dead ends: 2355 [2024-11-28 05:03:18,678 INFO L226 Difference]: Without dead ends: 2353 [2024-11-28 05:03:18,681 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 232 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4214 ImplicationChecksByTransitivity, 62.3s TimeCoverageRelationStatistics Valid=2813, Invalid=11228, Unknown=1, NotChecked=0, Total=14042 [2024-11-28 05:03:18,682 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 396 mSDsluCounter, 995 mSDsCounter, 0 mSdLazyCounter, 1697 mSolverCounterSat, 562 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 2259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 562 IncrementalHoareTripleChecker+Valid, 1697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:03:18,682 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 1045 Invalid, 2259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [562 Valid, 1697 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time] [2024-11-28 05:03:18,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2024-11-28 05:03:25,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 2075. [2024-11-28 05:03:25,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2075 states, 970 states have (on average 1.3453608247422681) internal successors, (1305), 1017 states have internal predecessors, (1305), 995 states have call successors, (995), 109 states have call predecessors, (995), 109 states have return successors, (994), 948 states have call predecessors, (994), 994 states have call successors, (994) [2024-11-28 05:03:26,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 3294 transitions. [2024-11-28 05:03:26,003 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 3294 transitions. Word has length 137 [2024-11-28 05:03:26,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:03:26,004 INFO L471 AbstractCegarLoop]: Abstraction has 2075 states and 3294 transitions. [2024-11-28 05:03:26,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.55) internal successors, (62), 39 states have internal predecessors, (62), 11 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2024-11-28 05:03:26,004 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 3294 transitions. [2024-11-28 05:03:26,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2024-11-28 05:03:26,008 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:03:26,008 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:26,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-28 05:03:26,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:26,209 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:03:26,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:26,209 INFO L85 PathProgramCache]: Analyzing trace with hash -569162940, now seen corresponding path program 8 times [2024-11-28 05:03:26,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:26,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465929871] [2024-11-28 05:03:26,209 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:03:26,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:26,237 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:03:26,238 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:03:26,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122886846] [2024-11-28 05:03:26,242 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:03:26,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:26,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:26,244 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:26,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 05:03:26,389 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:03:26,390 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:26,397 INFO L256 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 110 conjuncts are in the unsatisfiable core [2024-11-28 05:03:26,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:28,734 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 137 proven. 90 refuted. 0 times theorem prover too weak. 667 trivial. 0 not checked. [2024-11-28 05:03:28,734 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 166 proven. 45 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2024-11-28 05:03:30,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:30,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465929871] [2024-11-28 05:03:30,104 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:03:30,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122886846] [2024-11-28 05:03:30,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122886846] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:30,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:03:30,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16] total 37 [2024-11-28 05:03:30,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157968953] [2024-11-28 05:03:30,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:30,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-28 05:03:30,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:30,105 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-28 05:03:30,106 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1151, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 05:03:30,106 INFO L87 Difference]: Start difference. First operand 2075 states and 3294 transitions. Second operand has 37 states, 32 states have (on average 1.78125) internal successors, (57), 34 states have internal predecessors, (57), 16 states have call successors, (48), 2 states have call predecessors, (48), 3 states have return successors, (47), 12 states have call predecessors, (47), 14 states have call successors, (47) [2024-11-28 05:03:55,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:03:55,686 INFO L93 Difference]: Finished difference Result 2854 states and 4696 transitions. [2024-11-28 05:03:55,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-11-28 05:03:55,687 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 32 states have (on average 1.78125) internal successors, (57), 34 states have internal predecessors, (57), 16 states have call successors, (48), 2 states have call predecessors, (48), 3 states have return successors, (47), 12 states have call predecessors, (47), 14 states have call successors, (47) Word has length 147 [2024-11-28 05:03:55,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:03:55,701 INFO L225 Difference]: With dead ends: 2854 [2024-11-28 05:03:55,701 INFO L226 Difference]: Without dead ends: 2846 [2024-11-28 05:03:55,703 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 275 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2306 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1257, Invalid=7485, Unknown=0, NotChecked=0, Total=8742 [2024-11-28 05:03:55,703 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 152 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 2617 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 2942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 2617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2024-11-28 05:03:55,704 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1027 Invalid, 2942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 2617 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2024-11-28 05:03:55,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2024-11-28 05:04:04,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 2400. [2024-11-28 05:04:04,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 1092 states have (on average 1.3736263736263736) internal successors, (1500), 1141 states have internal predecessors, (1500), 1191 states have call successors, (1191), 116 states have call predecessors, (1191), 116 states have return successors, (1190), 1142 states have call predecessors, (1190), 1190 states have call successors, (1190) [2024-11-28 05:04:04,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 3881 transitions. [2024-11-28 05:04:04,575 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 3881 transitions. Word has length 147 [2024-11-28 05:04:04,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:04:04,575 INFO L471 AbstractCegarLoop]: Abstraction has 2400 states and 3881 transitions. [2024-11-28 05:04:04,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 32 states have (on average 1.78125) internal successors, (57), 34 states have internal predecessors, (57), 16 states have call successors, (48), 2 states have call predecessors, (48), 3 states have return successors, (47), 12 states have call predecessors, (47), 14 states have call successors, (47) [2024-11-28 05:04:04,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 3881 transitions. [2024-11-28 05:04:04,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2024-11-28 05:04:04,579 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:04:04,580 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:04,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-28 05:04:04,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:04,781 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:04:04,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:04,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1021624744, now seen corresponding path program 9 times [2024-11-28 05:04:04,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:04,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209915062] [2024-11-28 05:04:04,782 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:04:04,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:04,826 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-28 05:04:04,826 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:04:04,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2100328142] [2024-11-28 05:04:04,828 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:04:04,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:04,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:04,830 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:04,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 05:04:04,971 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-28 05:04:04,971 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:04,974 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-11-28 05:04:04,978 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 175 proven. 84 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2024-11-28 05:04:09,393 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:28,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:28,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209915062] [2024-11-28 05:04:28,136 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:04:28,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100328142] [2024-11-28 05:04:28,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100328142] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:28,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:04:28,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-11-28 05:04:28,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962037803] [2024-11-28 05:04:28,136 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:28,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 05:04:28,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:28,137 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 05:04:28,137 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 05:04:28,137 INFO L87 Difference]: Start difference. First operand 2400 states and 3881 transitions. Second operand has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2024-11-28 05:04:40,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.44s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 05:04:47,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:04:47,678 INFO L93 Difference]: Finished difference Result 2627 states and 4223 transitions. [2024-11-28 05:04:47,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-28 05:04:47,678 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 147 [2024-11-28 05:04:47,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:04:47,688 INFO L225 Difference]: With dead ends: 2627 [2024-11-28 05:04:47,688 INFO L226 Difference]: Without dead ends: 2620 [2024-11-28 05:04:47,689 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 141 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=278, Invalid=1884, Unknown=0, NotChecked=0, Total=2162 [2024-11-28 05:04:47,690 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 66 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2024-11-28 05:04:47,690 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 706 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2024-11-28 05:04:47,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2620 states. [2024-11-28 05:04:57,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2620 to 2512. [2024-11-28 05:04:57,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2512 states, 1146 states have (on average 1.368237347294939) internal successors, (1568), 1199 states have internal predecessors, (1568), 1239 states have call successors, (1239), 126 states have call predecessors, (1239), 126 states have return successors, (1238), 1186 states have call predecessors, (1238), 1238 states have call successors, (1238) [2024-11-28 05:04:57,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2512 states to 2512 states and 4045 transitions. [2024-11-28 05:04:57,742 INFO L78 Accepts]: Start accepts. Automaton has 2512 states and 4045 transitions. Word has length 147 [2024-11-28 05:04:57,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:04:57,743 INFO L471 AbstractCegarLoop]: Abstraction has 2512 states and 4045 transitions. [2024-11-28 05:04:57,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2024-11-28 05:04:57,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2512 states and 4045 transitions. [2024-11-28 05:04:57,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-28 05:04:57,749 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:04:57,749 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:57,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-28 05:04:57,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-28 05:04:57,953 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:04:57,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:57,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1542683119, now seen corresponding path program 10 times [2024-11-28 05:04:57,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:57,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103989027] [2024-11-28 05:04:57,954 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:04:57,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:57,991 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:04:57,991 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:04:57,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010340664] [2024-11-28 05:04:57,993 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:04:57,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:57,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:57,995 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:57,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd79a2e2-01bb-40af-ab04-257c6c27164d/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-28 05:04:58,114 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:04:58,114 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:58,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 116 conjuncts are in the unsatisfiable core [2024-11-28 05:04:58,121 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:05:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 116 proven. 118 refuted. 0 times theorem prover too weak. 667 trivial. 0 not checked. [2024-11-28 05:05:00,704 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:05:02,022 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 156 proven. 57 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2024-11-28 05:05:02,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:05:02,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103989027] [2024-11-28 05:05:02,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:05:02,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010340664] [2024-11-28 05:05:02,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010340664] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:05:02,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:05:02,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 16] total 41 [2024-11-28 05:05:02,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064721973] [2024-11-28 05:05:02,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:05:02,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-28 05:05:02,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:05:02,024 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-28 05:05:02,024 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1408, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 05:05:02,024 INFO L87 Difference]: Start difference. First operand 2512 states and 4045 transitions. Second operand has 41 states, 35 states have (on average 1.8) internal successors, (63), 37 states have internal predecessors, (63), 16 states have call successors, (43), 3 states have call predecessors, (43), 3 states have return successors, (42), 12 states have call predecessors, (42), 14 states have call successors, (42)