./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.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_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/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_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/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_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/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 a93c350e5795e32421c3bef9d7525c3fd53f570f971d574def19132b3d6f08b8 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 05:02:06,902 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 05:02:07,027 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 05:02:07,037 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 05:02:07,040 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 05:02:07,090 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 05:02:07,091 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 05:02:07,092 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 05:02:07,093 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 05:02:07,093 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 05:02:07,093 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 05:02:07,093 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 05:02:07,094 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 05:02:07,094 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 05:02:07,094 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 05:02:07,096 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 05:02:07,096 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 05:02:07,096 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 05:02:07,097 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 05:02:07,097 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 05:02:07,097 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 05:02:07,097 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 05:02:07,097 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 05:02:07,097 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 05:02:07,097 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 05:02:07,097 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 05:02:07,097 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 05:02:07,097 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 05:02:07,097 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 05:02:07,098 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:02:07,098 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:02:07,098 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:02:07,098 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:02:07,098 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 05:02:07,098 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:02:07,098 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:02:07,098 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:02:07,098 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:02:07,099 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 05:02:07,099 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 05:02:07,099 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 05:02:07,099 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 05:02:07,099 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 05:02:07,099 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 05:02:07,099 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 05:02:07,101 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 05:02:07,101 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 05:02:07,101 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 05:02:07,101 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_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/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 -> a93c350e5795e32421c3bef9d7525c3fd53f570f971d574def19132b3d6f08b8 [2024-11-28 05:02:07,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 05:02:07,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 05:02:07,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 05:02:07,475 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 05:02:07,475 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 05:02:07,478 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c [2024-11-28 05:02:10,787 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/data/eb911395e/2e3985d4a4d640f9b5226d668c514580/FLAG28292661a [2024-11-28 05:02:11,106 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 05:02:11,107 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c [2024-11-28 05:02:11,126 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/data/eb911395e/2e3985d4a4d640f9b5226d668c514580/FLAG28292661a [2024-11-28 05:02:11,362 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/data/eb911395e/2e3985d4a4d640f9b5226d668c514580 [2024-11-28 05:02:11,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 05:02:11,367 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 05:02:11,368 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 05:02:11,368 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 05:02:11,374 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 05:02:11,375 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:02:11" (1/1) ... [2024-11-28 05:02:11,376 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ed01837 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:11, skipping insertion in model container [2024-11-28 05:02:11,376 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:02:11" (1/1) ... [2024-11-28 05:02:11,400 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 05:02:11,620 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_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c[538,551] [2024-11-28 05:02:11,659 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:02:11,676 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 05:02:11,695 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_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound5.c[538,551] [2024-11-28 05:02:11,711 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:02:11,728 INFO L204 MainTranslator]: Completed translation [2024-11-28 05:02:11,728 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:11 WrapperNode [2024-11-28 05:02:11,729 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 05:02:11,730 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 05:02:11,730 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 05:02:11,730 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 05:02:11,739 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:11" (1/1) ... [2024-11-28 05:02:11,745 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:11" (1/1) ... [2024-11-28 05:02:11,767 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2024-11-28 05:02:11,767 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 05:02:11,768 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 05:02:11,768 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 05:02:11,768 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 05:02:11,787 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:11" (1/1) ... [2024-11-28 05:02:11,788 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:11" (1/1) ... [2024-11-28 05:02:11,789 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:11" (1/1) ... [2024-11-28 05:02:11,808 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 05:02:11,808 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:11" (1/1) ... [2024-11-28 05:02:11,808 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:11" (1/1) ... [2024-11-28 05:02:11,815 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:11" (1/1) ... [2024-11-28 05:02:11,819 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:11" (1/1) ... [2024-11-28 05:02:11,824 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:11" (1/1) ... [2024-11-28 05:02:11,826 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:11" (1/1) ... [2024-11-28 05:02:11,827 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:11" (1/1) ... [2024-11-28 05:02:11,829 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 05:02:11,830 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 05:02:11,830 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 05:02:11,830 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 05:02:11,832 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:11" (1/1) ... [2024-11-28 05:02:11,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:02:11,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:11,876 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 05:02:11,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 05:02:11,914 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 05:02:11,914 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-28 05:02:11,914 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-28 05:02:11,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 05:02:11,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 05:02:11,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 05:02:11,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-28 05:02:11,915 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-28 05:02:11,986 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 05:02:11,989 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 05:02:12,203 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-28 05:02:12,203 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 05:02:12,215 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 05:02:12,216 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-28 05:02:12,216 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:02:12 BoogieIcfgContainer [2024-11-28 05:02:12,216 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 05:02:12,219 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 05:02:12,219 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 05:02:12,225 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 05:02:12,225 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:02:11" (1/3) ... [2024-11-28 05:02:12,226 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ba8ee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:02:12, skipping insertion in model container [2024-11-28 05:02:12,226 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:02:11" (2/3) ... [2024-11-28 05:02:12,227 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ba8ee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:02:12, skipping insertion in model container [2024-11-28 05:02:12,227 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:02:12" (3/3) ... [2024-11-28 05:02:12,228 INFO L128 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound5.c [2024-11-28 05:02:12,247 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 05:02:12,249 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG hard-ll_valuebound5.c that has 3 procedures, 31 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-28 05:02:12,310 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 05:02:12,331 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;@74e9c5fd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 05:02:12,332 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 05:02:12,336 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-28 05:02:12,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-28 05:02:12,344 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:02:12,345 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:12,346 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:02:12,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:12,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1636017688, now seen corresponding path program 1 times [2024-11-28 05:02:12,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:12,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257056286] [2024-11-28 05:02:12,362 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:12,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:12,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 05:02:12,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:12,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257056286] [2024-11-28 05:02:12,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257056286] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:02:12,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164871964] [2024-11-28 05:02:12,538 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:12,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:12,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:12,546 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:12,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 05:02:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:12,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-28 05:02:12,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 05:02:12,668 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:02:12,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164871964] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:02:12,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:02:12,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-28 05:02:12,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729457093] [2024-11-28 05:02:12,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:02:12,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 05:02:12,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:12,704 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 05:02:12,705 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 05:02:12,707 INFO L87 Difference]: Start difference. First operand has 31 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 05:02:12,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:02:12,738 INFO L93 Difference]: Finished difference Result 59 states and 100 transitions. [2024-11-28 05:02:12,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 05:02:12,743 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2024-11-28 05:02:12,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:02:12,751 INFO L225 Difference]: With dead ends: 59 [2024-11-28 05:02:12,751 INFO L226 Difference]: Without dead ends: 27 [2024-11-28 05:02:12,756 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 24 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 05:02:12,761 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 05:02:12,763 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 05:02:12,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-28 05:02:12,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-28 05:02:12,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-28 05:02:12,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2024-11-28 05:02:12,819 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 23 [2024-11-28 05:02:12,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:02:12,819 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2024-11-28 05:02:12,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 05:02:12,820 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2024-11-28 05:02:12,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-28 05:02:12,823 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:02:12,823 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:12,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 05:02:13,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-28 05:02:13,025 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:02:13,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:13,026 INFO L85 PathProgramCache]: Analyzing trace with hash -426146774, now seen corresponding path program 1 times [2024-11-28 05:02:13,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:13,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141142080] [2024-11-28 05:02:13,026 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:13,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:13,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 05:02:13,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:13,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141142080] [2024-11-28 05:02:13,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141142080] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:02:13,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:02:13,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:02:13,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277836141] [2024-11-28 05:02:13,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:02:13,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:02:13,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:13,319 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:02:13,319 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:02:13,319 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 05:02:13,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:02:13,409 INFO L93 Difference]: Finished difference Result 39 states and 53 transitions. [2024-11-28 05:02:13,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:02:13,410 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2024-11-28 05:02:13,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:02:13,411 INFO L225 Difference]: With dead ends: 39 [2024-11-28 05:02:13,411 INFO L226 Difference]: Without dead ends: 37 [2024-11-28 05:02:13,411 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 05:02:13,412 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:02:13,413 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 119 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:02:13,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-11-28 05:02:13,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2024-11-28 05:02:13,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-28 05:02:13,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2024-11-28 05:02:13,424 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 23 [2024-11-28 05:02:13,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:02:13,424 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2024-11-28 05:02:13,425 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-28 05:02:13,425 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2024-11-28 05:02:13,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-28 05:02:13,426 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:02:13,426 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:13,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 05:02:13,427 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:02:13,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:13,427 INFO L85 PathProgramCache]: Analyzing trace with hash -300538825, now seen corresponding path program 1 times [2024-11-28 05:02:13,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:13,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227205561] [2024-11-28 05:02:13,428 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:13,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:13,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:13,699 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-28 05:02:13,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:13,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227205561] [2024-11-28 05:02:13,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227205561] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:02:13,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:02:13,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:02:13,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022136775] [2024-11-28 05:02:13,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:02:13,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:02:13,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:13,701 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:02:13,701 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:02:13,703 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 05:02:13,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:02:13,803 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2024-11-28 05:02:13,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:02:13,804 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2024-11-28 05:02:13,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:02:13,805 INFO L225 Difference]: With dead ends: 43 [2024-11-28 05:02:13,806 INFO L226 Difference]: Without dead ends: 41 [2024-11-28 05:02:13,806 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 05:02:13,807 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:02:13,808 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 116 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:02:13,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-28 05:02:13,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2024-11-28 05:02:13,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-11-28 05:02:13,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2024-11-28 05:02:13,818 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 28 [2024-11-28 05:02:13,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:02:13,818 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2024-11-28 05:02:13,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-28 05:02:13,819 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2024-11-28 05:02:13,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-28 05:02:13,820 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:02:13,820 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:13,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 05:02:13,821 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:02:13,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:13,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1372167178, now seen corresponding path program 1 times [2024-11-28 05:02:13,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:13,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450046183] [2024-11-28 05:02:13,822 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:13,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:02:13,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307872616] [2024-11-28 05:02:13,853 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:13,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:13,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:13,859 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:13,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 05:02:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:13,932 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 05:02:13,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 05:02:14,076 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:02:14,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:14,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450046183] [2024-11-28 05:02:14,077 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:02:14,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307872616] [2024-11-28 05:02:14,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307872616] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:02:14,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:02:14,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:02:14,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645242981] [2024-11-28 05:02:14,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:02:14,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:02:14,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:14,082 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:02:14,082 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:02:14,083 INFO L87 Difference]: Start difference. First operand 35 states and 43 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 05:02:14,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:02:14,199 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2024-11-28 05:02:14,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:02:14,200 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 33 [2024-11-28 05:02:14,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:02:14,201 INFO L225 Difference]: With dead ends: 58 [2024-11-28 05:02:14,201 INFO L226 Difference]: Without dead ends: 46 [2024-11-28 05:02:14,202 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 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 05:02:14,203 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:02:14,203 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 116 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:02:14,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-28 05:02:14,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-11-28 05:02:14,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 25 states have (on average 1.2) internal successors, (30), 26 states have internal predecessors, (30), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-11-28 05:02:14,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2024-11-28 05:02:14,218 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 33 [2024-11-28 05:02:14,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:02:14,218 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2024-11-28 05:02:14,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 05:02:14,219 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2024-11-28 05:02:14,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-28 05:02:14,220 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:02:14,220 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:14,231 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 05:02:14,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:14,425 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:02:14,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:14,426 INFO L85 PathProgramCache]: Analyzing trace with hash 404303124, now seen corresponding path program 1 times [2024-11-28 05:02:14,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:14,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602232283] [2024-11-28 05:02:14,426 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:14,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:02:14,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596281675] [2024-11-28 05:02:14,477 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:14,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:14,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:14,480 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:14,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 05:02:14,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:14,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 05:02:14,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:14,745 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 05:02:14,745 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:02:15,017 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-28 05:02:15,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:15,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602232283] [2024-11-28 05:02:15,018 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:02:15,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596281675] [2024-11-28 05:02:15,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596281675] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:02:15,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:02:15,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-11-28 05:02:15,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761921647] [2024-11-28 05:02:15,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:02:15,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 05:02:15,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:15,021 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 05:02:15,021 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-28 05:02:15,021 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 05:02:15,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:02:15,214 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2024-11-28 05:02:15,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:02:15,217 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 39 [2024-11-28 05:02:15,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:02:15,220 INFO L225 Difference]: With dead ends: 59 [2024-11-28 05:02:15,220 INFO L226 Difference]: Without dead ends: 57 [2024-11-28 05:02:15,220 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-11-28 05:02:15,223 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:02:15,223 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 136 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:02:15,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-28 05:02:15,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2024-11-28 05:02:15,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 18 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-28 05:02:15,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2024-11-28 05:02:15,255 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 39 [2024-11-28 05:02:15,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:02:15,255 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2024-11-28 05:02:15,255 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2024-11-28 05:02:15,255 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2024-11-28 05:02:15,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 05:02:15,257 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:02:15,257 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:15,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 05:02:15,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:15,457 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:02:15,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:15,458 INFO L85 PathProgramCache]: Analyzing trace with hash -2023308484, now seen corresponding path program 1 times [2024-11-28 05:02:15,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:15,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927455404] [2024-11-28 05:02:15,458 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:15,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:15,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:02:15,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [106234670] [2024-11-28 05:02:15,503 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:15,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:15,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:15,512 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:15,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 05:02:15,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:15,592 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 05:02:15,595 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:15,735 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-28 05:02:15,736 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:02:15,873 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-28 05:02:15,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:15,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927455404] [2024-11-28 05:02:15,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:02:15,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106234670] [2024-11-28 05:02:15,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106234670] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 05:02:15,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:02:15,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-28 05:02:15,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693973038] [2024-11-28 05:02:15,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:02:15,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:02:15,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:15,876 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:02:15,876 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:02:15,876 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 05:02:16,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:02:16,024 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2024-11-28 05:02:16,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:02:16,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 49 [2024-11-28 05:02:16,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:02:16,027 INFO L225 Difference]: With dead ends: 64 [2024-11-28 05:02:16,028 INFO L226 Difference]: Without dead ends: 62 [2024-11-28 05:02:16,028 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:02:16,029 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 4 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:02:16,032 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 110 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:02:16,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-28 05:02:16,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2024-11-28 05:02:16,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 36 states have internal predecessors, (40), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2024-11-28 05:02:16,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 79 transitions. [2024-11-28 05:02:16,051 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 79 transitions. Word has length 49 [2024-11-28 05:02:16,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:02:16,052 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 79 transitions. [2024-11-28 05:02:16,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 05:02:16,052 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 79 transitions. [2024-11-28 05:02:16,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-28 05:02:16,054 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:02:16,054 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 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, 1, 1, 1, 1] [2024-11-28 05:02:16,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 05:02:16,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:16,259 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:02:16,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:16,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1831809599, now seen corresponding path program 1 times [2024-11-28 05:02:16,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:16,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658185115] [2024-11-28 05:02:16,260 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:16,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:16,530 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-28 05:02:16,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:16,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658185115] [2024-11-28 05:02:16,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658185115] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:02:16,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:02:16,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:02:16,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953629701] [2024-11-28 05:02:16,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:02:16,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:02:16,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:16,532 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:02:16,532 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:02:16,533 INFO L87 Difference]: Start difference. First operand 61 states and 79 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-28 05:02:16,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:02:16,639 INFO L93 Difference]: Finished difference Result 69 states and 87 transitions. [2024-11-28 05:02:16,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:02:16,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2024-11-28 05:02:16,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:02:16,641 INFO L225 Difference]: With dead ends: 69 [2024-11-28 05:02:16,641 INFO L226 Difference]: Without dead ends: 58 [2024-11-28 05:02:16,642 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 05:02:16,643 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 3 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:02:16,643 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 126 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:02:16,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-28 05:02:16,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-11-28 05:02:16,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 32 states have (on average 1.1875) internal successors, (38), 35 states have internal predecessors, (38), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-11-28 05:02:16,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2024-11-28 05:02:16,672 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 55 [2024-11-28 05:02:16,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:02:16,675 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2024-11-28 05:02:16,676 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-11-28 05:02:16,676 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2024-11-28 05:02:16,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-11-28 05:02:16,677 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:02:16,677 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 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] [2024-11-28 05:02:16,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 05:02:16,678 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:02:16,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:16,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1805297171, now seen corresponding path program 1 times [2024-11-28 05:02:16,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:16,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130458670] [2024-11-28 05:02:16,681 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:16,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:16,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:02:16,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432197882] [2024-11-28 05:02:16,760 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:16,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:16,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:16,767 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:16,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 05:02:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:16,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-28 05:02:16,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2024-11-28 05:02:17,800 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:02:21,431 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-11-28 05:02:21,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:21,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130458670] [2024-11-28 05:02:21,432 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:02:21,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432197882] [2024-11-28 05:02:21,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432197882] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:02:21,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:02:21,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2024-11-28 05:02:21,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46095387] [2024-11-28 05:02:21,432 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:02:21,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-28 05:02:21,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:21,434 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-28 05:02:21,435 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-11-28 05:02:21,435 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-11-28 05:02:24,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:02:24,163 INFO L93 Difference]: Finished difference Result 134 states and 191 transitions. [2024-11-28 05:02:24,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 05:02:24,164 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 67 [2024-11-28 05:02:24,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:02:24,167 INFO L225 Difference]: With dead ends: 134 [2024-11-28 05:02:24,168 INFO L226 Difference]: Without dead ends: 113 [2024-11-28 05:02:24,169 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2024-11-28 05:02:24,170 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 56 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-28 05:02:24,170 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 219 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-28 05:02:24,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-28 05:02:24,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2024-11-28 05:02:24,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 55 states have internal predecessors, (62), 29 states have call successors, (29), 11 states have call predecessors, (29), 11 states have return successors, (28), 25 states have call predecessors, (28), 28 states have call successors, (28) [2024-11-28 05:02:24,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 119 transitions. [2024-11-28 05:02:24,228 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 119 transitions. Word has length 67 [2024-11-28 05:02:24,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:02:24,230 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 119 transitions. [2024-11-28 05:02:24,231 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 9 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2024-11-28 05:02:24,231 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 119 transitions. [2024-11-28 05:02:24,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-28 05:02:24,233 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:02:24,235 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 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] [2024-11-28 05:02:24,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 05:02:24,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-28 05:02:24,440 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:02:24,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:24,440 INFO L85 PathProgramCache]: Analyzing trace with hash 644856999, now seen corresponding path program 1 times [2024-11-28 05:02:24,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:24,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869759600] [2024-11-28 05:02:24,441 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:24,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:24,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:02:24,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [910871741] [2024-11-28 05:02:24,486 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:24,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:24,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:24,488 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:24,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 05:02:24,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:24,571 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 05:02:24,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:25,302 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2024-11-28 05:02:25,303 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:02:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-11-28 05:02:26,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:26,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869759600] [2024-11-28 05:02:26,384 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:02:26,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910871741] [2024-11-28 05:02:26,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910871741] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:02:26,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:02:26,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2024-11-28 05:02:26,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705580770] [2024-11-28 05:02:26,384 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:02:26,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-28 05:02:26,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:26,386 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-28 05:02:26,386 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-11-28 05:02:26,388 INFO L87 Difference]: Start difference. First operand 92 states and 119 transitions. Second operand has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) [2024-11-28 05:02:27,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:02:27,173 INFO L93 Difference]: Finished difference Result 130 states and 165 transitions. [2024-11-28 05:02:27,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 05:02:27,174 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) Word has length 78 [2024-11-28 05:02:27,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:02:27,176 INFO L225 Difference]: With dead ends: 130 [2024-11-28 05:02:27,176 INFO L226 Difference]: Without dead ends: 99 [2024-11-28 05:02:27,177 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2024-11-28 05:02:27,177 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 22 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:02:27,178 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 268 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 05:02:27,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-11-28 05:02:27,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 86. [2024-11-28 05:02:27,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 49 states have (on average 1.183673469387755) internal successors, (58), 51 states have internal predecessors, (58), 25 states have call successors, (25), 11 states have call predecessors, (25), 11 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-11-28 05:02:27,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 107 transitions. [2024-11-28 05:02:27,207 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 107 transitions. Word has length 78 [2024-11-28 05:02:27,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:02:27,207 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 107 transitions. [2024-11-28 05:02:27,208 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 17 states have internal predecessors, (29), 11 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 10 states have call predecessors, (24), 9 states have call successors, (24) [2024-11-28 05:02:27,208 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 107 transitions. [2024-11-28 05:02:27,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-28 05:02:27,209 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:02:27,210 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 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] [2024-11-28 05:02:27,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 05:02:27,410 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-28 05:02:27,411 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:02:27,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:27,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1470657900, now seen corresponding path program 2 times [2024-11-28 05:02:27,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:27,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964363760] [2024-11-28 05:02:27,411 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:02:27,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:27,435 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:02:27,436 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:02:27,715 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-11-28 05:02:27,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:27,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964363760] [2024-11-28 05:02:27,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964363760] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:02:27,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314773671] [2024-11-28 05:02:27,716 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:02:27,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:27,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:27,724 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:27,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 05:02:27,802 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:02:27,802 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:02:27,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 05:02:27,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-11-28 05:02:27,854 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:02:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-11-28 05:02:27,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314773671] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:02:27,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:02:27,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-11-28 05:02:28,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360070738] [2024-11-28 05:02:28,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:02:28,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:02:28,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:28,003 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:02:28,003 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:02:28,003 INFO L87 Difference]: Start difference. First operand 86 states and 107 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-28 05:02:28,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:02:28,088 INFO L93 Difference]: Finished difference Result 110 states and 141 transitions. [2024-11-28 05:02:28,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:02:28,089 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 79 [2024-11-28 05:02:28,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:02:28,090 INFO L225 Difference]: With dead ends: 110 [2024-11-28 05:02:28,091 INFO L226 Difference]: Without dead ends: 90 [2024-11-28 05:02:28,091 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:02:28,092 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:02:28,092 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 105 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:02:28,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-11-28 05:02:28,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2024-11-28 05:02:28,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2024-11-28 05:02:28,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2024-11-28 05:02:28,122 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 79 [2024-11-28 05:02:28,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:02:28,123 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2024-11-28 05:02:28,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 5 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-28 05:02:28,123 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2024-11-28 05:02:28,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-28 05:02:28,125 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:02:28,125 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 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 05:02:28,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 05:02:28,328 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-28 05:02:28,329 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:02:28,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:28,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1992152934, now seen corresponding path program 1 times [2024-11-28 05:02:28,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:28,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984209959] [2024-11-28 05:02:28,330 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:28,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:28,832 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-11-28 05:02:28,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:28,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984209959] [2024-11-28 05:02:28,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984209959] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:02:28,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767923863] [2024-11-28 05:02:28,833 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:28,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:28,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:28,835 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:28,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 05:02:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:28,912 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 05:02:28,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 28 proven. 7 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2024-11-28 05:02:29,374 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:02:29,825 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-11-28 05:02:29,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767923863] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:02:29,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:02:29,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 8] total 18 [2024-11-28 05:02:29,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139088927] [2024-11-28 05:02:29,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:02:29,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:02:29,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:29,827 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:02:29,828 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:02:29,828 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 15 states have internal predecessors, (33), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2024-11-28 05:02:30,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:02:30,309 INFO L93 Difference]: Finished difference Result 104 states and 132 transitions. [2024-11-28 05:02:30,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 05:02:30,310 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 15 states have internal predecessors, (33), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) Word has length 83 [2024-11-28 05:02:30,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:02:30,311 INFO L225 Difference]: With dead ends: 104 [2024-11-28 05:02:30,311 INFO L226 Difference]: Without dead ends: 89 [2024-11-28 05:02:30,312 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2024-11-28 05:02:30,313 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 19 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:02:30,313 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 330 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 05:02:30,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-28 05:02:30,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2024-11-28 05:02:30,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 50 states have internal predecessors, (56), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-28 05:02:30,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2024-11-28 05:02:30,340 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 83 [2024-11-28 05:02:30,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:02:30,341 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2024-11-28 05:02:30,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 15 states have internal predecessors, (33), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2024-11-28 05:02:30,341 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2024-11-28 05:02:30,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-11-28 05:02:30,342 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:02:30,342 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 05:02:30,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 05:02:30,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:30,547 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:02:30,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:30,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1871784667, now seen corresponding path program 1 times [2024-11-28 05:02:30,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:30,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702071647] [2024-11-28 05:02:30,548 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:30,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-28 05:02:30,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:30,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702071647] [2024-11-28 05:02:30,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702071647] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:02:30,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142951871] [2024-11-28 05:02:30,667 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:02:30,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:30,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:30,672 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:30,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 05:02:30,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:02:30,735 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 05:02:30,738 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:30,778 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2024-11-28 05:02:30,779 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:02:30,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142951871] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:02:30,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:02:30,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-11-28 05:02:30,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113370958] [2024-11-28 05:02:30,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:02:30,783 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:02:30,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:30,784 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:02:30,784 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:02:30,784 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-11-28 05:02:30,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:02:30,876 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2024-11-28 05:02:30,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:02:30,877 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 87 [2024-11-28 05:02:30,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:02:30,878 INFO L225 Difference]: With dead ends: 90 [2024-11-28 05:02:30,878 INFO L226 Difference]: Without dead ends: 78 [2024-11-28 05:02:30,879 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:02:30,879 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:02:30,880 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 106 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:02:30,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-11-28 05:02:30,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-11-28 05:02:30,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 46 states have internal predecessors, (51), 22 states have call successors, (22), 10 states have call predecessors, (22), 10 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-11-28 05:02:30,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2024-11-28 05:02:30,911 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 87 [2024-11-28 05:02:30,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:02:30,912 INFO L471 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2024-11-28 05:02:30,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-11-28 05:02:30,913 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2024-11-28 05:02:30,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-28 05:02:30,915 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:02:30,915 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:30,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-28 05:02:31,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:31,116 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:02:31,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:31,117 INFO L85 PathProgramCache]: Analyzing trace with hash 551807558, now seen corresponding path program 3 times [2024-11-28 05:02:31,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:31,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479742289] [2024-11-28 05:02:31,117 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:02:31,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:31,229 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-28 05:02:31,229 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:02:31,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254623024] [2024-11-28 05:02:31,231 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:02:31,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:31,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:31,234 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:31,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 05:02:31,363 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 05:02:31,363 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:02:31,365 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-28 05:02:31,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:31,946 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 96 proven. 20 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2024-11-28 05:02:31,947 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:02:48,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:48,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479742289] [2024-11-28 05:02:48,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:02:48,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254623024] [2024-11-28 05:02:48,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254623024] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:02:48,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:02:48,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-11-28 05:02:48,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208291582] [2024-11-28 05:02:48,312 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:02:48,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-28 05:02:48,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:48,314 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-28 05:02:48,314 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2024-11-28 05:02:48,315 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-28 05:02:48,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:02:48,928 INFO L93 Difference]: Finished difference Result 129 states and 166 transitions. [2024-11-28 05:02:48,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-28 05:02:48,928 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 95 [2024-11-28 05:02:48,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:02:48,930 INFO L225 Difference]: With dead ends: 129 [2024-11-28 05:02:48,930 INFO L226 Difference]: Without dead ends: 109 [2024-11-28 05:02:48,931 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2024-11-28 05:02:48,931 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 24 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-28 05:02:48,936 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 190 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-28 05:02:48,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-28 05:02:48,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2024-11-28 05:02:48,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 63 states have internal predecessors, (68), 33 states have call successors, (33), 13 states have call predecessors, (33), 13 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-28 05:02:48,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 133 transitions. [2024-11-28 05:02:48,982 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 133 transitions. Word has length 95 [2024-11-28 05:02:48,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:02:48,982 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 133 transitions. [2024-11-28 05:02:48,983 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2024-11-28 05:02:48,983 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 133 transitions. [2024-11-28 05:02:48,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-28 05:02:48,985 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:02:48,986 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 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] [2024-11-28 05:02:48,998 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 05:02:49,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-28 05:02:49,190 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:02:49,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:49,190 INFO L85 PathProgramCache]: Analyzing trace with hash 419015342, now seen corresponding path program 2 times [2024-11-28 05:02:49,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:49,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427549534] [2024-11-28 05:02:49,191 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:02:49,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:49,274 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:02:49,277 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:02:49,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [703244494] [2024-11-28 05:02:49,279 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:02:49,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:49,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:49,283 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:49,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 05:02:49,380 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:02:49,380 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:02:49,382 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-28 05:02:49,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:49,630 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 124 proven. 22 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2024-11-28 05:02:49,631 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:02:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-11-28 05:02:49,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:49,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427549534] [2024-11-28 05:02:49,928 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:02:49,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703244494] [2024-11-28 05:02:49,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703244494] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:02:49,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:02:49,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2024-11-28 05:02:49,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675283888] [2024-11-28 05:02:49,929 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:02:49,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 05:02:49,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:49,930 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 05:02:49,930 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-11-28 05:02:49,930 INFO L87 Difference]: Start difference. First operand 107 states and 133 transitions. Second operand has 14 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-28 05:02:50,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:02:50,697 INFO L93 Difference]: Finished difference Result 121 states and 144 transitions. [2024-11-28 05:02:50,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-28 05:02:50,698 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) Word has length 106 [2024-11-28 05:02:50,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:02:50,699 INFO L225 Difference]: With dead ends: 121 [2024-11-28 05:02:50,699 INFO L226 Difference]: Without dead ends: 119 [2024-11-28 05:02:50,700 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2024-11-28 05:02:50,701 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:02:50,701 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 166 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 05:02:50,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-28 05:02:50,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2024-11-28 05:02:50,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 72 states have internal predecessors, (77), 33 states have call successors, (33), 16 states have call predecessors, (33), 16 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2024-11-28 05:02:50,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 142 transitions. [2024-11-28 05:02:50,753 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 142 transitions. Word has length 106 [2024-11-28 05:02:50,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:02:50,757 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 142 transitions. [2024-11-28 05:02:50,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 5 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (15), 5 states have call predecessors, (15), 3 states have call successors, (15) [2024-11-28 05:02:50,757 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 142 transitions. [2024-11-28 05:02:50,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-28 05:02:50,760 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:02:50,760 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 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] [2024-11-28 05:02:50,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-28 05:02:50,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-28 05:02:50,961 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:02:50,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:50,961 INFO L85 PathProgramCache]: Analyzing trace with hash -240195853, now seen corresponding path program 2 times [2024-11-28 05:02:50,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:50,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624518180] [2024-11-28 05:02:50,962 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:02:50,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:50,985 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:02:50,985 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:02:51,642 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 32 proven. 22 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2024-11-28 05:02:51,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:51,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624518180] [2024-11-28 05:02:51,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624518180] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:02:51,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018232368] [2024-11-28 05:02:51,643 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:02:51,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:51,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:51,645 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:51,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 05:02:51,727 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:02:51,727 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:02:51,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-28 05:02:51,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:52,559 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 52 proven. 47 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2024-11-28 05:02:52,559 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:02:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 52 proven. 47 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2024-11-28 05:02:54,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018232368] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:02:54,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:02:54,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 14] total 30 [2024-11-28 05:02:54,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459962963] [2024-11-28 05:02:54,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:02:54,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 05:02:54,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:54,253 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 05:02:54,254 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2024-11-28 05:02:54,254 INFO L87 Difference]: Start difference. First operand 119 states and 142 transitions. Second operand has 30 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 27 states have internal predecessors, (45), 19 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 19 states have call predecessors, (48), 19 states have call successors, (48) [2024-11-28 05:02:55,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:02:55,284 INFO L93 Difference]: Finished difference Result 139 states and 166 transitions. [2024-11-28 05:02:55,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 05:02:55,285 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 27 states have internal predecessors, (45), 19 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 19 states have call predecessors, (48), 19 states have call successors, (48) Word has length 111 [2024-11-28 05:02:55,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:02:55,286 INFO L225 Difference]: With dead ends: 139 [2024-11-28 05:02:55,286 INFO L226 Difference]: Without dead ends: 107 [2024-11-28 05:02:55,287 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=214, Invalid=1192, Unknown=0, NotChecked=0, Total=1406 [2024-11-28 05:02:55,287 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 16 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 05:02:55,287 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 290 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 05:02:55,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-11-28 05:02:55,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 95. [2024-11-28 05:02:55,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 58 states have internal predecessors, (60), 24 states have call successors, (24), 14 states have call predecessors, (24), 14 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-28 05:02:55,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2024-11-28 05:02:55,324 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 111 [2024-11-28 05:02:55,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:02:55,325 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2024-11-28 05:02:55,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 27 states have internal predecessors, (45), 19 states have call successors, (50), 3 states have call predecessors, (50), 2 states have return successors, (48), 19 states have call predecessors, (48), 19 states have call successors, (48) [2024-11-28 05:02:55,325 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2024-11-28 05:02:55,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-28 05:02:55,326 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:02:55,326 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:02:55,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 05:02:55,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:55,531 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:02:55,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:02:55,531 INFO L85 PathProgramCache]: Analyzing trace with hash 552510968, now seen corresponding path program 4 times [2024-11-28 05:02:55,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:02:55,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978071159] [2024-11-28 05:02:55,532 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:02:55,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:02:55,563 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:02:55,563 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:02:56,688 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 58 proven. 10 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2024-11-28 05:02:56,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:02:56,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978071159] [2024-11-28 05:02:56,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978071159] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:02:56,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817951582] [2024-11-28 05:02:56,689 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:02:56,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:02:56,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:02:56,692 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:02:56,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 05:02:56,781 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:02:56,782 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:02:56,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-28 05:02:56,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:02:57,614 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 54 proven. 14 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2024-11-28 05:02:57,614 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:02:58,603 INFO L134 CoverageAnalysis]: Checked inductivity of 554 backedges. 34 proven. 34 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2024-11-28 05:02:58,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817951582] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:02:58,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:02:58,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2024-11-28 05:02:58,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982374790] [2024-11-28 05:02:58,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:02:58,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 05:02:58,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:02:58,607 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 05:02:58,608 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2024-11-28 05:02:58,608 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 30 states have internal predecessors, (44), 21 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (51), 19 states have call predecessors, (51), 20 states have call successors, (51) [2024-11-28 05:02:59,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:02:59,949 INFO L93 Difference]: Finished difference Result 138 states and 171 transitions. [2024-11-28 05:02:59,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 05:02:59,950 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 30 states have internal predecessors, (44), 21 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (51), 19 states have call predecessors, (51), 20 states have call successors, (51) Word has length 111 [2024-11-28 05:02:59,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:02:59,951 INFO L225 Difference]: With dead ends: 138 [2024-11-28 05:02:59,952 INFO L226 Difference]: Without dead ends: 117 [2024-11-28 05:02:59,952 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=370, Invalid=1352, Unknown=0, NotChecked=0, Total=1722 [2024-11-28 05:02:59,953 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 36 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 05:02:59,954 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 417 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 05:02:59,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-11-28 05:02:59,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 96. [2024-11-28 05:02:59,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 59 states have internal predecessors, (61), 24 states have call successors, (24), 14 states have call predecessors, (24), 14 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-11-28 05:02:59,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2024-11-28 05:02:59,992 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 111 [2024-11-28 05:02:59,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:02:59,992 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2024-11-28 05:02:59,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 30 states have internal predecessors, (44), 21 states have call successors, (52), 2 states have call predecessors, (52), 2 states have return successors, (51), 19 states have call predecessors, (51), 20 states have call successors, (51) [2024-11-28 05:02:59,997 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2024-11-28 05:02:59,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-11-28 05:02:59,998 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:02:59,998 INFO L218 NwaCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 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 05:03:00,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-28 05:03:00,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-28 05:03:00,203 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:03:00,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:00,203 INFO L85 PathProgramCache]: Analyzing trace with hash 2034113703, now seen corresponding path program 1 times [2024-11-28 05:03:00,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:00,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122711769] [2024-11-28 05:03:00,204 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:03:00,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:03:00,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1376823144] [2024-11-28 05:03:00,255 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:03:00,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:00,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:00,258 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:00,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 05:03:00,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:03:00,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-28 05:03:00,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 33 proven. 87 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2024-11-28 05:03:01,202 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:03:18,284 INFO L134 CoverageAnalysis]: Checked inductivity of 622 backedges. 33 proven. 81 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2024-11-28 05:03:18,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:03:18,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122711769] [2024-11-28 05:03:18,284 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:03:18,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376823144] [2024-11-28 05:03:18,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376823144] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:03:18,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:03:18,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 28 [2024-11-28 05:03:18,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390673360] [2024-11-28 05:03:18,285 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:03:18,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 05:03:18,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:03:18,287 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 05:03:18,287 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2024-11-28 05:03:18,287 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand has 28 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 states have internal predecessors, (41), 18 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 16 states have call predecessors, (40), 18 states have call successors, (40) [2024-11-28 05:03:23,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 05:03:25,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:03:25,606 INFO L93 Difference]: Finished difference Result 153 states and 186 transitions. [2024-11-28 05:03:25,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-28 05:03:25,607 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 states have internal predecessors, (41), 18 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 16 states have call predecessors, (40), 18 states have call successors, (40) Word has length 116 [2024-11-28 05:03:25,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:03:25,610 INFO L225 Difference]: With dead ends: 153 [2024-11-28 05:03:25,610 INFO L226 Difference]: Without dead ends: 132 [2024-11-28 05:03:25,611 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=342, Invalid=1464, Unknown=0, NotChecked=0, Total=1806 [2024-11-28 05:03:25,612 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 47 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-11-28 05:03:25,612 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 328 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-11-28 05:03:25,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-28 05:03:25,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2024-11-28 05:03:25,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 78 states have internal predecessors, (80), 38 states have call successors, (38), 17 states have call predecessors, (38), 17 states have return successors, (37), 34 states have call predecessors, (37), 37 states have call successors, (37) [2024-11-28 05:03:25,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 155 transitions. [2024-11-28 05:03:25,695 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 155 transitions. Word has length 116 [2024-11-28 05:03:25,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:03:25,697 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 155 transitions. [2024-11-28 05:03:25,697 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 25 states have internal predecessors, (41), 18 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 16 states have call predecessors, (40), 18 states have call successors, (40) [2024-11-28 05:03:25,697 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 155 transitions. [2024-11-28 05:03:25,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-28 05:03:25,699 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:03:25,699 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:03:25,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-28 05:03:25,903 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 05:03:25,904 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:03:25,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:03:25,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1984158241, now seen corresponding path program 2 times [2024-11-28 05:03:25,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:03:25,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292527782] [2024-11-28 05:03:25,905 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:03:25,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:03:25,956 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:03:25,956 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:03:25,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1126692424] [2024-11-28 05:03:25,958 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:03:25,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:03:25,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:03:25,961 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:03:25,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 05:03:26,061 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:03:26,061 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:03:26,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-28 05:03:26,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:03:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 65 proven. 67 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2024-11-28 05:03:27,496 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 65 proven. 61 refuted. 0 times theorem prover too weak. 573 trivial. 0 not checked. [2024-11-28 05:04:14,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:14,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292527782] [2024-11-28 05:04:14,554 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:04:14,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126692424] [2024-11-28 05:04:14,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126692424] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:14,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:04:14,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2024-11-28 05:04:14,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812820538] [2024-11-28 05:04:14,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:14,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-28 05:04:14,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:14,556 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-28 05:04:14,556 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2024-11-28 05:04:14,557 INFO L87 Difference]: Start difference. First operand 130 states and 155 transitions. Second operand has 32 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 31 states have internal predecessors, (45), 18 states have call successors, (43), 3 states have call predecessors, (43), 3 states have return successors, (42), 16 states have call predecessors, (42), 16 states have call successors, (42) [2024-11-28 05:04:21,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 05:04:25,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 05:04:35,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:04:35,783 INFO L93 Difference]: Finished difference Result 170 states and 199 transitions. [2024-11-28 05:04:35,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-28 05:04:35,784 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 31 states have internal predecessors, (45), 18 states have call successors, (43), 3 states have call predecessors, (43), 3 states have return successors, (42), 16 states have call predecessors, (42), 16 states have call successors, (42) Word has length 123 [2024-11-28 05:04:35,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:04:35,785 INFO L225 Difference]: With dead ends: 170 [2024-11-28 05:04:35,785 INFO L226 Difference]: Without dead ends: 168 [2024-11-28 05:04:35,786 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=499, Invalid=1853, Unknown=0, NotChecked=0, Total=2352 [2024-11-28 05:04:35,786 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 54 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:04:35,786 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 582 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2024-11-28 05:04:35,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-11-28 05:04:35,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 158. [2024-11-28 05:04:35,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 98 states have internal predecessors, (102), 40 states have call successors, (40), 23 states have call predecessors, (40), 23 states have return successors, (39), 36 states have call predecessors, (39), 39 states have call successors, (39) [2024-11-28 05:04:35,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 181 transitions. [2024-11-28 05:04:35,852 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 181 transitions. Word has length 123 [2024-11-28 05:04:35,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:04:35,853 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 181 transitions. [2024-11-28 05:04:35,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 31 states have internal predecessors, (45), 18 states have call successors, (43), 3 states have call predecessors, (43), 3 states have return successors, (42), 16 states have call predecessors, (42), 16 states have call successors, (42) [2024-11-28 05:04:35,853 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 181 transitions. [2024-11-28 05:04:35,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-28 05:04:35,854 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:04:35,854 INFO L218 NwaCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:35,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 05:04:36,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 05:04:36,055 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:04:36,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:36,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1084342478, now seen corresponding path program 1 times [2024-11-28 05:04:36,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:36,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364623175] [2024-11-28 05:04:36,055 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:04:36,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:04:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 42 proven. 45 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2024-11-28 05:04:37,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:37,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364623175] [2024-11-28 05:04:37,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364623175] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:37,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408494254] [2024-11-28 05:04:37,135 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:04:37,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:37,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:37,138 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:37,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 05:04:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:04:37,236 INFO L256 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-28 05:04:37,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:38,382 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 41 proven. 106 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2024-11-28 05:04:38,382 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:39,809 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 41 proven. 106 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2024-11-28 05:04:39,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408494254] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:39,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:04:39,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 15] total 40 [2024-11-28 05:04:39,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814353396] [2024-11-28 05:04:39,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:39,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-28 05:04:39,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:39,811 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-28 05:04:39,812 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1353, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 05:04:39,812 INFO L87 Difference]: Start difference. First operand 158 states and 181 transitions. Second operand has 40 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 26 states have call successors, (69), 3 states have call predecessors, (69), 2 states have return successors, (66), 24 states have call predecessors, (66), 26 states have call successors, (66) [2024-11-28 05:04:40,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:04:40,966 INFO L93 Difference]: Finished difference Result 173 states and 200 transitions. [2024-11-28 05:04:40,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-28 05:04:40,967 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 26 states have call successors, (69), 3 states have call predecessors, (69), 2 states have return successors, (66), 24 states have call predecessors, (66), 26 states have call successors, (66) Word has length 139 [2024-11-28 05:04:40,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:04:40,969 INFO L225 Difference]: With dead ends: 173 [2024-11-28 05:04:40,969 INFO L226 Difference]: Without dead ends: 137 [2024-11-28 05:04:40,970 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=272, Invalid=1798, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 05:04:40,971 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 15 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-28 05:04:40,972 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 550 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-28 05:04:40,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-11-28 05:04:41,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2024-11-28 05:04:41,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 81 states have (on average 1.0740740740740742) internal successors, (87), 84 states have internal predecessors, (87), 30 states have call successors, (30), 21 states have call predecessors, (30), 21 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2024-11-28 05:04:41,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 146 transitions. [2024-11-28 05:04:41,020 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 146 transitions. Word has length 139 [2024-11-28 05:04:41,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:04:41,020 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 146 transitions. [2024-11-28 05:04:41,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 26 states have call successors, (69), 3 states have call predecessors, (69), 2 states have return successors, (66), 24 states have call predecessors, (66), 26 states have call successors, (66) [2024-11-28 05:04:41,020 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 146 transitions. [2024-11-28 05:04:41,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-11-28 05:04:41,022 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:04:41,022 INFO L218 NwaCegarLoop]: trace histogram [23, 22, 22, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:41,033 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 05:04:41,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:41,226 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:04:41,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:41,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1351703897, now seen corresponding path program 2 times [2024-11-28 05:04:41,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:41,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275666174] [2024-11-28 05:04:41,226 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:04:41,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:41,243 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:04:41,243 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 68 proven. 26 refuted. 0 times theorem prover too weak. 936 trivial. 0 not checked. [2024-11-28 05:04:41,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:41,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275666174] [2024-11-28 05:04:41,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275666174] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:41,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942223966] [2024-11-28 05:04:41,546 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:04:41,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:41,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:41,549 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:41,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 05:04:41,637 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:04:41,637 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:41,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-28 05:04:41,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:41,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 166 proven. 10 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2024-11-28 05:04:41,712 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:41,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 80 proven. 10 refuted. 0 times theorem prover too weak. 940 trivial. 0 not checked. [2024-11-28 05:04:41,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942223966] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:04:41,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:04:41,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 10 [2024-11-28 05:04:41,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397162120] [2024-11-28 05:04:41,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:42,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 05:04:42,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:42,001 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 05:04:42,001 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-11-28 05:04:42,002 INFO L87 Difference]: Start difference. First operand 133 states and 146 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 10 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2024-11-28 05:04:42,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:04:42,231 INFO L93 Difference]: Finished difference Result 148 states and 163 transitions. [2024-11-28 05:04:42,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 05:04:42,231 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 10 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) Word has length 143 [2024-11-28 05:04:42,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:04:42,233 INFO L225 Difference]: With dead ends: 148 [2024-11-28 05:04:42,233 INFO L226 Difference]: Without dead ends: 136 [2024-11-28 05:04:42,233 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 278 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-11-28 05:04:42,234 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 4 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:04:42,234 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 207 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:04:42,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-11-28 05:04:42,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2024-11-28 05:04:42,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 82 states have (on average 1.0609756097560976) internal successors, (87), 85 states have internal predecessors, (87), 32 states have call successors, (32), 21 states have call predecessors, (32), 21 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2024-11-28 05:04:42,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 150 transitions. [2024-11-28 05:04:42,306 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 150 transitions. Word has length 143 [2024-11-28 05:04:42,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:04:42,306 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 150 transitions. [2024-11-28 05:04:42,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 10 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2024-11-28 05:04:42,307 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 150 transitions. [2024-11-28 05:04:42,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2024-11-28 05:04:42,308 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:04:42,308 INFO L218 NwaCegarLoop]: trace histogram [23, 22, 22, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:42,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 05:04:42,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:42,509 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:04:42,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:04:42,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1476642194, now seen corresponding path program 3 times [2024-11-28 05:04:42,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:04:42,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938829358] [2024-11-28 05:04:42,510 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:04:42,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:04:42,591 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-28 05:04:42,591 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:43,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 53 proven. 55 refuted. 0 times theorem prover too weak. 930 trivial. 0 not checked. [2024-11-28 05:04:43,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:04:43,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938829358] [2024-11-28 05:04:43,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938829358] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:43,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035417555] [2024-11-28 05:04:43,793 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:04:43,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:43,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:04:43,795 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:04:43,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 05:04:43,920 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-28 05:04:43,920 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:04:43,922 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-28 05:04:43,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:04:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 222 proven. 7 refuted. 0 times theorem prover too weak. 809 trivial. 0 not checked. [2024-11-28 05:04:47,667 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:04:51,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035417555] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:04:51,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:04:51,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2024-11-28 05:04:51,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473001119] [2024-11-28 05:04:51,528 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:04:51,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-28 05:04:51,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:04:51,529 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-28 05:04:51,529 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 05:04:51,529 INFO L87 Difference]: Start difference. First operand 136 states and 150 transitions. Second operand has 28 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 16 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (35), 15 states have call predecessors, (35), 15 states have call successors, (35) [2024-11-28 05:04:53,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:04:53,357 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2024-11-28 05:04:53,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 05:04:53,358 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 16 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (35), 15 states have call predecessors, (35), 15 states have call successors, (35) Word has length 144 [2024-11-28 05:04:53,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:04:53,358 INFO L225 Difference]: With dead ends: 136 [2024-11-28 05:04:53,358 INFO L226 Difference]: Without dead ends: 0 [2024-11-28 05:04:53,359 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=217, Invalid=1423, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 05:04:53,359 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 05:04:53,360 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 369 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 05:04:53,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-28 05:04:53,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-28 05:04:53,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 05:04:53,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-28 05:04:53,361 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 144 [2024-11-28 05:04:53,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:04:53,361 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-28 05:04:53,361 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 16 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (35), 15 states have call predecessors, (35), 15 states have call successors, (35) [2024-11-28 05:04:53,361 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-28 05:04:53,361 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-28 05:04:53,364 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-28 05:04:53,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-28 05:04:53,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:04:53,568 INFO L422 BasicCegarLoop]: Path program histogram: [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:04:53,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-28 05:05:01,880 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-28 05:05:01,903 WARN L970 BoogieBacktranslator]: Unfinished Backtranslation: Expression type not yet supported in backtranslation: QuantifierExpression [2024-11-28 05:05:01,906 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:05:01 BoogieIcfgContainer [2024-11-28 05:05:01,906 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-28 05:05:01,906 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-28 05:05:01,907 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-28 05:05:01,907 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-28 05:05:01,907 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:02:12" (3/4) ... [2024-11-28 05:05:01,913 INFO L146 WitnessPrinter]: Generating witness for correct program [2024-11-28 05:05:01,919 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2024-11-28 05:05:01,920 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-11-28 05:05:01,925 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2024-11-28 05:05:01,925 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-11-28 05:05:01,925 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-11-28 05:05:01,925 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-11-28 05:05:02,003 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/witness.graphml [2024-11-28 05:05:02,004 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/witness.yml [2024-11-28 05:05:02,004 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-28 05:05:02,005 INFO L158 Benchmark]: Toolchain (without parser) took 170638.15ms. Allocated memory was 167.8MB in the beginning and 604.0MB in the end (delta: 436.2MB). Free memory was 130.7MB in the beginning and 283.0MB in the end (delta: -152.4MB). Peak memory consumption was 280.6MB. Max. memory is 16.1GB. [2024-11-28 05:05:02,005 INFO L158 Benchmark]: CDTParser took 0.59ms. Allocated memory is still 167.8MB. Free memory is still 104.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 05:05:02,005 INFO L158 Benchmark]: CACSL2BoogieTranslator took 361.22ms. Allocated memory is still 167.8MB. Free memory was 130.4MB in the beginning and 118.9MB in the end (delta: 11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 05:05:02,005 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.44ms. Allocated memory is still 167.8MB. Free memory was 118.9MB in the beginning and 117.6MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 05:05:02,006 INFO L158 Benchmark]: Boogie Preprocessor took 61.16ms. Allocated memory is still 167.8MB. Free memory was 117.6MB in the beginning and 116.1MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 05:05:02,006 INFO L158 Benchmark]: RCFGBuilder took 386.09ms. Allocated memory is still 167.8MB. Free memory was 116.1MB in the beginning and 104.3MB in the end (delta: 11.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-28 05:05:02,006 INFO L158 Benchmark]: TraceAbstraction took 169686.74ms. Allocated memory was 167.8MB in the beginning and 604.0MB in the end (delta: 436.2MB). Free memory was 103.7MB in the beginning and 287.4MB in the end (delta: -183.7MB). Peak memory consumption was 333.1MB. Max. memory is 16.1GB. [2024-11-28 05:05:02,007 INFO L158 Benchmark]: Witness Printer took 97.33ms. Allocated memory is still 604.0MB. Free memory was 287.4MB in the beginning and 283.0MB in the end (delta: 4.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 05:05:02,008 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.59ms. Allocated memory is still 167.8MB. Free memory is still 104.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 361.22ms. Allocated memory is still 167.8MB. Free memory was 130.4MB in the beginning and 118.9MB in the end (delta: 11.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.44ms. Allocated memory is still 167.8MB. Free memory was 118.9MB in the beginning and 117.6MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 61.16ms. Allocated memory is still 167.8MB. Free memory was 117.6MB in the beginning and 116.1MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 386.09ms. Allocated memory is still 167.8MB. Free memory was 116.1MB in the beginning and 104.3MB in the end (delta: 11.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 169686.74ms. Allocated memory was 167.8MB in the beginning and 604.0MB in the end (delta: 436.2MB). Free memory was 103.7MB in the beginning and 287.4MB in the end (delta: -183.7MB). Peak memory consumption was 333.1MB. Max. memory is 16.1GB. * Witness Printer took 97.33ms. Allocated memory is still 604.0MB. Free memory was 287.4MB in the beginning and 283.0MB in the end (delta: 4.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression type not yet supported in backtranslation: QuantifierExpression * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 161.3s, OverallIterations: 21, TraceHistogramMax: 23, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 40.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 429 SdHoareTripleChecker+Valid, 16.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 356 mSDsluCounter, 4891 SdHoareTripleChecker+Invalid, 16.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4149 mSDsCounter, 734 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4809 IncrementalHoareTripleChecker+Invalid, 5543 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 734 mSolverCounterUnsat, 742 mSDtfsCounter, 4809 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3069 GetRequests, 2649 SyntacticMatches, 13 SemanticMatches, 407 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2877 ImplicationChecksByTransitivity, 45.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=158occurred in iteration=18, InterpolantAutomatonStates: 252, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 21 MinimizatonAttempts, 106 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 113.3s InterpolantComputationTime, 3358 NumberOfCodeBlocks, 3267 NumberOfCodeBlocksAsserted, 78 NumberOfCheckSat, 3853 ConstructedInterpolants, 4 QuantifiedInterpolants, 36926 SizeOfPredicates, 42 NumberOfNonLiveVariables, 3454 ConjunctsInSsa, 451 ConjunctsInUnsatCore, 43 InterpolantComputations, 7 PerfectInterpolantSequences, 17432/18406 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: (((((((((((((((A == ((__int128) r + 4)) && (2 == p)) && (0 <= r)) && (A <= 5)) && (B == 1)) && (q == 4)) && (2 == d)) || ((((((p == 1) && (((long long) A + 1) <= ((__int128) 2 * d))) && (d <= A)) && (q == 1)) && (((__int128) d + r) == A)) && (((__int128) d + A) == ((__int128) ((long long) 2 * B) + r)))) || ((((((2 == p) && (((long long) 2 * B) == d)) && (q == 0)) && (r == A)) && (((__int128) r + 1) <= d)) && (((d >= 0) ? (d / 2) : ((d / 2) - 1)) <= r))) || ((((((p == 1) && (d == B)) && (((__int128) r + 1) <= ((__int128) ((d >= 0) ? (d / 2) : ((d / 2) - 1)) + d))) && ((((__int128) q * B) + r) == A)) && (((__int128) ((long long) 2 * B) + r) <= 4294967295)) && (B <= 2147483647))) || ((((((p == 4) && (d == ((long long) 4 * B))) && (q == 0)) && (r == A)) && (((__int128) r + 1) <= d)) && (((d >= 0) ? (d / 2) : ((d / 2) - 1)) <= r))) || (((((((p == 8) && (A <= 5)) && (q == 0)) && (((__int128) r + ((long long) 8 * B)) == ((__int128) d + A))) && (d == ((long long) 8 * B))) && (((__int128) r + 1) <= d)) && (((d >= 0) ? (d / 2) : ((d / 2) - 1)) <= r))) || ((((((2 == p) && (d <= A)) && (2 == q)) && (((__int128) d + r) == A)) && (A == ((__int128) ((long long) 2 * B) + r))) && ((((__int128) d + r) + 1) <= ((long long) 4 * B)))) || ((((p == 1) && (d == B)) && (q == 0)) && (r == A))) || (((((((p == 4) && (A == ((__int128) r + 4))) && (0 <= r)) && (A <= 5)) && (B == 1)) && (q == 4)) && (d == 4))) - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((((((((2 == p) && (((long long) 2 * B) == d)) && (A <= 5)) && (q == 0)) && (r == A)) && (((d >= 0) ? (d / 2) : ((d / 2) - 1)) <= r)) || (((((((p == 4) && (d == ((long long) 4 * B))) && (1 <= ((d >= 0) ? (d / 2) : ((d / 2) - 1)))) && (A <= 5)) && (q == 0)) && (r == A)) && (((d >= 0) ? (d / 2) : ((d / 2) - 1)) <= r))) || (((((((B <= 5) && (p == 1)) && (d == B)) && (A <= 5)) && (q == 0)) && (r == A)) && (((__int128) 5 + r) <= ((__int128) d * 10)))) || (((((((p == 8) && (A <= 5)) && (q == 0)) && ((((__int128) r * 4) + 20) <= ((__int128) 5 * d))) && (((__int128) r + ((long long) 8 * B)) == ((__int128) d + A))) && (d == ((long long) 8 * B))) && (((d >= 0) ? (d / 2) : ((d / 2) - 1)) <= r))) RESULT: Ultimate proved your program to be correct! [2024-11-28 05:05:02,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb8ca575-a0c8-4705-9a3e-67477ed4ec5a/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE