./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.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_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/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_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/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_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/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 436f0a1b9da8affd8e76edc25dee0cffff5a08ff489ec96067821d6a4548518b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 05:19:47,230 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 05:19:47,316 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 05:19:47,323 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 05:19:47,323 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 05:19:47,352 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 05:19:47,353 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 05:19:47,353 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 05:19:47,354 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 05:19:47,354 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 05:19:47,354 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 05:19:47,354 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 05:19:47,355 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 05:19:47,355 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 05:19:47,355 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 05:19:47,355 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 05:19:47,355 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 05:19:47,356 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 05:19:47,356 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 05:19:47,356 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 05:19:47,356 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 05:19:47,356 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 05:19:47,357 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 05:19:47,357 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 05:19:47,357 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 05:19:47,357 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 05:19:47,357 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 05:19:47,357 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 05:19:47,358 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 05:19:47,358 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:19:47,358 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:19:47,358 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:19:47,358 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:19:47,359 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 05:19:47,359 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 05:19:47,359 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 05:19:47,359 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 05:19:47,359 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:19:47,360 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 05:19:47,360 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 05:19:47,360 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 05:19:47,360 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 05:19:47,360 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 05:19:47,360 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 05:19:47,360 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 05:19:47,360 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 05:19:47,361 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 05:19:47,361 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 05:19:47,361 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_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/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 -> 436f0a1b9da8affd8e76edc25dee0cffff5a08ff489ec96067821d6a4548518b [2024-11-28 05:19:47,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 05:19:47,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 05:19:47,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 05:19:47,737 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 05:19:47,738 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 05:19:47,739 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2024-11-28 05:19:51,526 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/data/ab1829708/c43ab166a629437a914a217df3abf364/FLAG111db6b26 [2024-11-28 05:19:51,862 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 05:19:51,863 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c [2024-11-28 05:19:51,874 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/data/ab1829708/c43ab166a629437a914a217df3abf364/FLAG111db6b26 [2024-11-28 05:19:51,895 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/data/ab1829708/c43ab166a629437a914a217df3abf364 [2024-11-28 05:19:51,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 05:19:51,900 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 05:19:51,902 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 05:19:51,902 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 05:19:51,908 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 05:19:51,909 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:19:51" (1/1) ... [2024-11-28 05:19:51,911 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e0f80e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:19:51, skipping insertion in model container [2024-11-28 05:19:51,911 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:19:51" (1/1) ... [2024-11-28 05:19:51,931 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 05:19:52,170 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_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c[490,503] [2024-11-28 05:19:52,220 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:19:52,240 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 05:19:52,255 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_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_unwindbound50.c[490,503] [2024-11-28 05:19:52,281 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 05:19:52,307 INFO L204 MainTranslator]: Completed translation [2024-11-28 05:19:52,308 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:19:52 WrapperNode [2024-11-28 05:19:52,308 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 05:19:52,310 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 05:19:52,310 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 05:19:52,310 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 05:19:52,325 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:19:52" (1/1) ... [2024-11-28 05:19:52,335 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:19:52" (1/1) ... [2024-11-28 05:19:52,365 INFO L138 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 91 [2024-11-28 05:19:52,366 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 05:19:52,366 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 05:19:52,366 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 05:19:52,366 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 05:19:52,381 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:19:52" (1/1) ... [2024-11-28 05:19:52,381 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:19:52" (1/1) ... [2024-11-28 05:19:52,386 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:19:52" (1/1) ... [2024-11-28 05:19:52,411 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 05:19:52,412 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:19:52" (1/1) ... [2024-11-28 05:19:52,412 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:19:52" (1/1) ... [2024-11-28 05:19:52,418 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:19:52" (1/1) ... [2024-11-28 05:19:52,423 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:19:52" (1/1) ... [2024-11-28 05:19:52,431 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:19:52" (1/1) ... [2024-11-28 05:19:52,432 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:19:52" (1/1) ... [2024-11-28 05:19:52,433 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:19:52" (1/1) ... [2024-11-28 05:19:52,438 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 05:19:52,443 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 05:19:52,443 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 05:19:52,444 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 05:19:52,445 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:19:52" (1/1) ... [2024-11-28 05:19:52,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 05:19:52,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:52,498 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 05:19:52,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 05:19:52,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 05:19:52,540 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-28 05:19:52,540 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-28 05:19:52,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 05:19:52,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 05:19:52,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 05:19:52,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-28 05:19:52,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-28 05:19:52,626 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 05:19:52,629 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 05:19:52,890 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-11-28 05:19:52,890 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 05:19:52,903 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 05:19:52,903 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-28 05:19:52,904 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:19:52 BoogieIcfgContainer [2024-11-28 05:19:52,904 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 05:19:52,908 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 05:19:52,908 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 05:19:52,918 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 05:19:52,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:19:51" (1/3) ... [2024-11-28 05:19:52,919 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e056ac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:19:52, skipping insertion in model container [2024-11-28 05:19:52,919 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:19:52" (2/3) ... [2024-11-28 05:19:52,920 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e056ac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:19:52, skipping insertion in model container [2024-11-28 05:19:52,920 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:19:52" (3/3) ... [2024-11-28 05:19:52,922 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd3-ll_unwindbound50.c [2024-11-28 05:19:52,943 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 05:19:52,945 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd3-ll_unwindbound50.c that has 3 procedures, 35 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-28 05:19:53,017 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 05:19:53,041 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;@5e3f7e5b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 05:19:53,041 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 05:19:53,048 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-28 05:19:53,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-28 05:19:53,058 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:53,059 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:53,059 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:53,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:53,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1663185933, now seen corresponding path program 1 times [2024-11-28 05:19:53,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:53,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084900644] [2024-11-28 05:19:53,082 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:53,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:19:53,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:53,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084900644] [2024-11-28 05:19:53,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084900644] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:53,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398866994] [2024-11-28 05:19:53,274 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:53,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:53,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:53,277 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:53,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 05:19:53,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:53,422 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-28 05:19:53,430 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-28 05:19:53,450 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:19:53,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398866994] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:19:53,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:19:53,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-11-28 05:19:53,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216840350] [2024-11-28 05:19:53,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:19:53,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 05:19:53,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:53,497 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 05:19:53,498 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 05:19:53,502 INFO L87 Difference]: Start difference. First operand has 35 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:19:53,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:53,539 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2024-11-28 05:19:53,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 05:19:53,545 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-11-28 05:19:53,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:53,558 INFO L225 Difference]: With dead ends: 67 [2024-11-28 05:19:53,559 INFO L226 Difference]: Without dead ends: 31 [2024-11-28 05:19:53,564 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 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 05:19:53,570 INFO L435 NwaCegarLoop]: 45 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, 45 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 05:19:53,573 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:19:53,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-28 05:19:53,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-11-28 05:19:53,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:19:53,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2024-11-28 05:19:53,637 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 18 [2024-11-28 05:19:53,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:53,638 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2024-11-28 05:19:53,639 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:19:53,639 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2024-11-28 05:19:53,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-28 05:19:53,641 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:53,641 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:53,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 05:19:53,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-28 05:19:53,846 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:53,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:53,849 INFO L85 PathProgramCache]: Analyzing trace with hash 986042158, now seen corresponding path program 1 times [2024-11-28 05:19:53,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:53,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051022311] [2024-11-28 05:19:53,850 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:53,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:53,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:54,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:19:54,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:54,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051022311] [2024-11-28 05:19:54,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051022311] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:19:54,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:19:54,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 05:19:54,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21833739] [2024-11-28 05:19:54,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:19:54,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:19:54,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:54,128 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:19:54,128 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:19:54,128 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:54,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:54,187 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2024-11-28 05:19:54,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 05:19:54,188 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2024-11-28 05:19:54,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:54,190 INFO L225 Difference]: With dead ends: 40 [2024-11-28 05:19:54,190 INFO L226 Difference]: Without dead ends: 33 [2024-11-28 05:19:54,190 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:19:54,191 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:54,192 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 103 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:19:54,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-28 05:19:54,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-11-28 05:19:54,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:19:54,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2024-11-28 05:19:54,210 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2024-11-28 05:19:54,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:54,211 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2024-11-28 05:19:54,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:54,214 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2024-11-28 05:19:54,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-28 05:19:54,215 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:54,215 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:54,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 05:19:54,216 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:54,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:54,217 INFO L85 PathProgramCache]: Analyzing trace with hash 368384092, now seen corresponding path program 1 times [2024-11-28 05:19:54,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:54,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557082545] [2024-11-28 05:19:54,218 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:54,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:54,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:19:54,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:54,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557082545] [2024-11-28 05:19:54,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557082545] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:19:54,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:19:54,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 05:19:54,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458504391] [2024-11-28 05:19:54,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:19:54,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 05:19:54,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:54,469 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 05:19:54,469 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:19:54,469 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:54,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:54,644 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2024-11-28 05:19:54,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:19:54,645 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2024-11-28 05:19:54,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:54,646 INFO L225 Difference]: With dead ends: 53 [2024-11-28 05:19:54,646 INFO L226 Difference]: Without dead ends: 46 [2024-11-28 05:19:54,647 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:19:54,648 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 42 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:54,648 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 119 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:19:54,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-28 05:19:54,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 34. [2024-11-28 05:19:54,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-28 05:19:54,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2024-11-28 05:19:54,666 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 20 [2024-11-28 05:19:54,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:54,666 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2024-11-28 05:19:54,666 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:54,667 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2024-11-28 05:19:54,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-28 05:19:54,667 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:54,667 INFO L218 NwaCegarLoop]: trace histogram [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 05:19:54,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 05:19:54,668 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:54,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:54,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1914665021, now seen corresponding path program 1 times [2024-11-28 05:19:54,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:54,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118378621] [2024-11-28 05:19:54,669 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:54,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:54,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:19:54,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808237295] [2024-11-28 05:19:54,703 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:54,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:54,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:54,705 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:54,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 05:19:54,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:54,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 05:19:54,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:55,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:19:55,081 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:19:55,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:55,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118378621] [2024-11-28 05:19:55,082 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:19:55,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808237295] [2024-11-28 05:19:55,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808237295] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:19:55,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:19:55,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:19:55,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422560897] [2024-11-28 05:19:55,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:19:55,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:19:55,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:55,084 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:19:55,084 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:19:55,084 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:55,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:55,185 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2024-11-28 05:19:55,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:19:55,186 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2024-11-28 05:19:55,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:55,187 INFO L225 Difference]: With dead ends: 52 [2024-11-28 05:19:55,189 INFO L226 Difference]: Without dead ends: 50 [2024-11-28 05:19:55,190 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 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 05:19:55,191 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 9 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:55,192 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 138 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:19:55,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-11-28 05:19:55,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2024-11-28 05:19:55,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 35 states have internal predecessors, (45), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-28 05:19:55,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2024-11-28 05:19:55,216 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 25 [2024-11-28 05:19:55,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:55,218 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2024-11-28 05:19:55,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:55,219 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2024-11-28 05:19:55,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-28 05:19:55,219 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:55,220 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:55,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 05:19:55,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:55,421 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:55,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:55,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1120743530, now seen corresponding path program 1 times [2024-11-28 05:19:55,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:55,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360061463] [2024-11-28 05:19:55,422 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:55,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:55,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:19:55,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:55,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360061463] [2024-11-28 05:19:55,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360061463] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:19:55,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:19:55,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:19:55,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80351525] [2024-11-28 05:19:55,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:19:55,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:19:55,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:55,569 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:19:55,569 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:19:55,569 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:55,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:55,635 INFO L93 Difference]: Finished difference Result 73 states and 100 transitions. [2024-11-28 05:19:55,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:19:55,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2024-11-28 05:19:55,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:55,638 INFO L225 Difference]: With dead ends: 73 [2024-11-28 05:19:55,638 INFO L226 Difference]: Without dead ends: 51 [2024-11-28 05:19:55,638 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:19:55,641 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:55,642 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 128 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:19:55,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-28 05:19:55,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-28 05:19:55,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 37 states have internal predecessors, (47), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-11-28 05:19:55,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2024-11-28 05:19:55,663 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 25 [2024-11-28 05:19:55,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:55,663 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2024-11-28 05:19:55,664 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:55,664 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2024-11-28 05:19:55,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-28 05:19:55,664 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:55,665 INFO L218 NwaCegarLoop]: trace histogram [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 05:19:55,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-28 05:19:55,669 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:55,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:55,669 INFO L85 PathProgramCache]: Analyzing trace with hash -495940029, now seen corresponding path program 1 times [2024-11-28 05:19:55,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:55,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567373093] [2024-11-28 05:19:55,670 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:55,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:19:55,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:55,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567373093] [2024-11-28 05:19:55,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567373093] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:55,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488774032] [2024-11-28 05:19:55,916 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:55,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:55,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:55,922 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:55,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 05:19:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:56,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 05:19:56,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:56,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:19:56,107 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:56,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:19:56,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488774032] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:19:56,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:19:56,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2024-11-28 05:19:56,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220756748] [2024-11-28 05:19:56,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:19:56,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 05:19:56,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:56,246 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 05:19:56,247 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-11-28 05:19:56,247 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 05:19:56,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:56,525 INFO L93 Difference]: Finished difference Result 147 states and 193 transitions. [2024-11-28 05:19:56,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-28 05:19:56,526 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 26 [2024-11-28 05:19:56,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:56,528 INFO L225 Difference]: With dead ends: 147 [2024-11-28 05:19:56,528 INFO L226 Difference]: Without dead ends: 140 [2024-11-28 05:19:56,528 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2024-11-28 05:19:56,529 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 72 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:56,529 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 234 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:19:56,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-28 05:19:56,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 97. [2024-11-28 05:19:56,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 71 states have internal predecessors, (92), 20 states have call successors, (20), 7 states have call predecessors, (20), 7 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-11-28 05:19:56,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 130 transitions. [2024-11-28 05:19:56,561 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 130 transitions. Word has length 26 [2024-11-28 05:19:56,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:56,561 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 130 transitions. [2024-11-28 05:19:56,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 05:19:56,561 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 130 transitions. [2024-11-28 05:19:56,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-28 05:19:56,562 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:56,562 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:56,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-28 05:19:56,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-28 05:19:56,771 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:56,772 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:56,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1671576551, now seen corresponding path program 1 times [2024-11-28 05:19:56,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:56,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691811456] [2024-11-28 05:19:56,772 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:56,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:56,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:57,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:19:57,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:57,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691811456] [2024-11-28 05:19:57,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691811456] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:19:57,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286833559] [2024-11-28 05:19:57,021 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:57,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:57,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:57,024 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:57,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 05:19:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:57,090 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 05:19:57,091 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:57,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:19:57,158 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:57,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:19:57,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286833559] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:19:57,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:19:57,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-11-28 05:19:57,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158869430] [2024-11-28 05:19:57,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:19:57,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 05:19:57,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:57,308 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 05:19:57,308 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-28 05:19:57,309 INFO L87 Difference]: Start difference. First operand 97 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:19:57,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:57,680 INFO L93 Difference]: Finished difference Result 183 states and 261 transitions. [2024-11-28 05:19:57,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-28 05:19:57,681 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2024-11-28 05:19:57,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:57,683 INFO L225 Difference]: With dead ends: 183 [2024-11-28 05:19:57,683 INFO L226 Difference]: Without dead ends: 171 [2024-11-28 05:19:57,684 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-11-28 05:19:57,684 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 113 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:57,685 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 293 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:19:57,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-11-28 05:19:57,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 128. [2024-11-28 05:19:57,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 97 states have (on average 1.3505154639175259) internal successors, (131), 98 states have internal predecessors, (131), 23 states have call successors, (23), 7 states have call predecessors, (23), 7 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-28 05:19:57,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 176 transitions. [2024-11-28 05:19:57,718 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 176 transitions. Word has length 27 [2024-11-28 05:19:57,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:57,718 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 176 transitions. [2024-11-28 05:19:57,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-28 05:19:57,718 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 176 transitions. [2024-11-28 05:19:57,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-28 05:19:57,719 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:57,719 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:57,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 05:19:57,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-28 05:19:57,920 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:57,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:57,921 INFO L85 PathProgramCache]: Analyzing trace with hash -544486195, now seen corresponding path program 1 times [2024-11-28 05:19:57,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:57,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579928583] [2024-11-28 05:19:57,921 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:57,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:57,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:19:57,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [192303431] [2024-11-28 05:19:57,963 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:57,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:57,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:57,970 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:57,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 05:19:58,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:58,056 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 05:19:58,059 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:58,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:19:58,250 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:19:58,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:58,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579928583] [2024-11-28 05:19:58,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:19:58,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192303431] [2024-11-28 05:19:58,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192303431] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:19:58,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:19:58,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:19:58,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515992555] [2024-11-28 05:19:58,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:19:58,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:19:58,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:58,252 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:19:58,252 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:19:58,253 INFO L87 Difference]: Start difference. First operand 128 states and 176 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 05:19:58,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:58,350 INFO L93 Difference]: Finished difference Result 143 states and 190 transitions. [2024-11-28 05:19:58,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:19:58,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2024-11-28 05:19:58,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:58,355 INFO L225 Difference]: With dead ends: 143 [2024-11-28 05:19:58,355 INFO L226 Difference]: Without dead ends: 141 [2024-11-28 05:19:58,356 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:19:58,356 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:58,357 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 136 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:19:58,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-11-28 05:19:58,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2024-11-28 05:19:58,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 106 states have (on average 1.320754716981132) internal successors, (140), 107 states have internal predecessors, (140), 23 states have call successors, (23), 10 states have call predecessors, (23), 10 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-11-28 05:19:58,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 185 transitions. [2024-11-28 05:19:58,391 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 185 transitions. Word has length 30 [2024-11-28 05:19:58,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:58,392 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 185 transitions. [2024-11-28 05:19:58,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-28 05:19:58,392 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 185 transitions. [2024-11-28 05:19:58,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-28 05:19:58,393 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:58,393 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:19:58,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-28 05:19:58,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:58,598 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:58,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:58,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1797448472, now seen corresponding path program 1 times [2024-11-28 05:19:58,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:58,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740190540] [2024-11-28 05:19:58,599 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:58,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:19:58,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44810050] [2024-11-28 05:19:58,638 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:58,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:58,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:19:58,645 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:19:58,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 05:19:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:58,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 05:19:58,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:19:58,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:19:58,935 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:19:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:19:59,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:59,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740190540] [2024-11-28 05:19:59,241 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:19:59,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44810050] [2024-11-28 05:19:59,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44810050] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:19:59,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:19:59,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2024-11-28 05:19:59,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214130689] [2024-11-28 05:19:59,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:19:59,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 05:19:59,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:59,243 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 05:19:59,243 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-28 05:19:59,243 INFO L87 Difference]: Start difference. First operand 140 states and 185 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:59,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:59,450 INFO L93 Difference]: Finished difference Result 175 states and 237 transitions. [2024-11-28 05:19:59,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:19:59,452 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2024-11-28 05:19:59,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:59,454 INFO L225 Difference]: With dead ends: 175 [2024-11-28 05:19:59,454 INFO L226 Difference]: Without dead ends: 173 [2024-11-28 05:19:59,455 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-28 05:19:59,455 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 27 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:59,459 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 264 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:19:59,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-11-28 05:19:59,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2024-11-28 05:19:59,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3464566929133859) internal successors, (171), 128 states have internal predecessors, (171), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-28 05:19:59,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 232 transitions. [2024-11-28 05:19:59,523 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 232 transitions. Word has length 32 [2024-11-28 05:19:59,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:19:59,524 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 232 transitions. [2024-11-28 05:19:59,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:59,524 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 232 transitions. [2024-11-28 05:19:59,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-28 05:19:59,526 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:19:59,526 INFO L218 NwaCegarLoop]: trace histogram [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 05:19:59,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 05:19:59,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:19:59,730 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:19:59,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:19:59,733 INFO L85 PathProgramCache]: Analyzing trace with hash -352567575, now seen corresponding path program 1 times [2024-11-28 05:19:59,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:19:59,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313608929] [2024-11-28 05:19:59,733 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:19:59,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:19:59,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:19:59,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:19:59,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:19:59,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313608929] [2024-11-28 05:19:59,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313608929] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:19:59,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:19:59,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-28 05:19:59,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972621469] [2024-11-28 05:19:59,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:19:59,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 05:19:59,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:19:59,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 05:19:59,893 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:19:59,893 INFO L87 Difference]: Start difference. First operand 170 states and 232 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:19:59,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:19:59,962 INFO L93 Difference]: Finished difference Result 237 states and 325 transitions. [2024-11-28 05:19:59,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:19:59,964 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2024-11-28 05:19:59,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:19:59,965 INFO L225 Difference]: With dead ends: 237 [2024-11-28 05:19:59,966 INFO L226 Difference]: Without dead ends: 170 [2024-11-28 05:19:59,966 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-28 05:19:59,970 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 10 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:19:59,970 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 128 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:19:59,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-11-28 05:20:00,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2024-11-28 05:20:00,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.3385826771653544) internal successors, (170), 128 states have internal predecessors, (170), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-11-28 05:20:00,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 231 transitions. [2024-11-28 05:20:00,019 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 231 transitions. Word has length 32 [2024-11-28 05:20:00,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:20:00,020 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 231 transitions. [2024-11-28 05:20:00,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:20:00,020 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 231 transitions. [2024-11-28 05:20:00,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-28 05:20:00,021 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:20:00,021 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:20:00,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-28 05:20:00,022 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:20:00,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:20:00,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1336855101, now seen corresponding path program 1 times [2024-11-28 05:20:00,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:20:00,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000744133] [2024-11-28 05:20:00,022 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:20:00,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:20:00,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:20:00,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668259470] [2024-11-28 05:20:00,054 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:20:00,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:00,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:20:00,057 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:20:00,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 05:20:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:20:00,128 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 05:20:00,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:20:00,219 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 05:20:00,219 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:20:00,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:20:00,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000744133] [2024-11-28 05:20:00,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:20:00,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668259470] [2024-11-28 05:20:00,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668259470] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:20:00,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:20:00,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:20:00,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228748360] [2024-11-28 05:20:00,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:20:00,221 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:20:00,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:20:00,222 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:20:00,222 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:20:00,222 INFO L87 Difference]: Start difference. First operand 170 states and 231 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 05:20:00,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:20:00,339 INFO L93 Difference]: Finished difference Result 235 states and 331 transitions. [2024-11-28 05:20:00,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:20:00,340 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 35 [2024-11-28 05:20:00,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:20:00,342 INFO L225 Difference]: With dead ends: 235 [2024-11-28 05:20:00,342 INFO L226 Difference]: Without dead ends: 233 [2024-11-28 05:20:00,343 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 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 05:20:00,344 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:20:00,344 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 128 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:20:00,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2024-11-28 05:20:00,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 226. [2024-11-28 05:20:00,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 160 states have (on average 1.36875) internal successors, (219), 161 states have internal predecessors, (219), 51 states have call successors, (51), 14 states have call predecessors, (51), 14 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2024-11-28 05:20:00,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 320 transitions. [2024-11-28 05:20:00,399 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 320 transitions. Word has length 35 [2024-11-28 05:20:00,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:20:00,400 INFO L471 AbstractCegarLoop]: Abstraction has 226 states and 320 transitions. [2024-11-28 05:20:00,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 05:20:00,400 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 320 transitions. [2024-11-28 05:20:00,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-28 05:20:00,401 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:20:00,401 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-28 05:20:00,414 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 05:20:00,606 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:00,606 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:20:00,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:20:00,607 INFO L85 PathProgramCache]: Analyzing trace with hash -711573864, now seen corresponding path program 1 times [2024-11-28 05:20:00,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:20:00,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034823201] [2024-11-28 05:20:00,607 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:20:00,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:20:00,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:20:00,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745052477] [2024-11-28 05:20:00,644 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:20:00,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:00,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:20:00,652 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:20:00,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 05:20:00,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:20:00,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-28 05:20:00,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:20:01,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 05:20:01,156 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:20:01,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:20:01,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034823201] [2024-11-28 05:20:01,237 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:20:01,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745052477] [2024-11-28 05:20:01,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745052477] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:20:01,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:20:01,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-11-28 05:20:01,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837560536] [2024-11-28 05:20:01,238 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:20:01,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 05:20:01,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:20:01,239 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 05:20:01,239 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-28 05:20:01,239 INFO L87 Difference]: Start difference. First operand 226 states and 320 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 05:20:01,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:20:01,567 INFO L93 Difference]: Finished difference Result 238 states and 330 transitions. [2024-11-28 05:20:01,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-28 05:20:01,568 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2024-11-28 05:20:01,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:20:01,570 INFO L225 Difference]: With dead ends: 238 [2024-11-28 05:20:01,570 INFO L226 Difference]: Without dead ends: 236 [2024-11-28 05:20:01,571 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2024-11-28 05:20:01,572 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 68 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:20:01,572 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 264 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:20:01,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-11-28 05:20:01,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 234. [2024-11-28 05:20:01,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 166 states have (on average 1.355421686746988) internal successors, (225), 167 states have internal predecessors, (225), 51 states have call successors, (51), 16 states have call predecessors, (51), 16 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2024-11-28 05:20:01,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 326 transitions. [2024-11-28 05:20:01,615 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 326 transitions. Word has length 37 [2024-11-28 05:20:01,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:20:01,616 INFO L471 AbstractCegarLoop]: Abstraction has 234 states and 326 transitions. [2024-11-28 05:20:01,616 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 8 states have internal predecessors, (30), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-28 05:20:01,616 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 326 transitions. [2024-11-28 05:20:01,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-28 05:20:01,617 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:20:01,617 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:20:01,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-28 05:20:01,822 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-28 05:20:01,822 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:20:01,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:20:01,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1366159795, now seen corresponding path program 1 times [2024-11-28 05:20:01,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:20:01,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195922717] [2024-11-28 05:20:01,823 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:20:01,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:20:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:20:01,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326843693] [2024-11-28 05:20:01,843 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:20:01,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:01,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:20:01,846 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:20:01,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-28 05:20:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:20:01,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 05:20:01,916 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:20:01,997 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-28 05:20:01,998 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 05:20:01,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:20:01,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195922717] [2024-11-28 05:20:01,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:20:01,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326843693] [2024-11-28 05:20:01,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326843693] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:20:01,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:20:01,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:20:01,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260875368] [2024-11-28 05:20:01,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:20:01,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:20:01,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:20:02,000 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:20:02,000 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:20:02,000 INFO L87 Difference]: Start difference. First operand 234 states and 326 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 05:20:02,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:20:02,136 INFO L93 Difference]: Finished difference Result 309 states and 454 transitions. [2024-11-28 05:20:02,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:20:02,137 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 40 [2024-11-28 05:20:02,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:20:02,140 INFO L225 Difference]: With dead ends: 309 [2024-11-28 05:20:02,141 INFO L226 Difference]: Without dead ends: 307 [2024-11-28 05:20:02,142 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 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 05:20:02,143 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:20:02,146 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 136 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:20:02,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2024-11-28 05:20:02,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 292. [2024-11-28 05:20:02,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 187 states have (on average 1.358288770053476) internal successors, (254), 197 states have internal predecessors, (254), 87 states have call successors, (87), 17 states have call predecessors, (87), 17 states have return successors, (86), 77 states have call predecessors, (86), 86 states have call successors, (86) [2024-11-28 05:20:02,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 427 transitions. [2024-11-28 05:20:02,227 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 427 transitions. Word has length 40 [2024-11-28 05:20:02,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:20:02,228 INFO L471 AbstractCegarLoop]: Abstraction has 292 states and 427 transitions. [2024-11-28 05:20:02,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 05:20:02,228 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 427 transitions. [2024-11-28 05:20:02,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-28 05:20:02,230 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:20:02,230 INFO L218 NwaCegarLoop]: trace histogram [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] [2024-11-28 05:20:02,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-28 05:20:02,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:02,434 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:20:02,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:20:02,435 INFO L85 PathProgramCache]: Analyzing trace with hash 493677206, now seen corresponding path program 1 times [2024-11-28 05:20:02,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:20:02,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516101730] [2024-11-28 05:20:02,435 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:20:02,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:20:02,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:20:02,669 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:20:02,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:20:02,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516101730] [2024-11-28 05:20:02,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516101730] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:20:02,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900144873] [2024-11-28 05:20:02,670 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:20:02,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:02,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:20:02,673 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:20:02,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-28 05:20:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:20:02,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-28 05:20:02,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:20:02,816 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:20:02,817 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:20:02,979 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:20:02,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900144873] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:20:02,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:20:02,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2024-11-28 05:20:02,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669612762] [2024-11-28 05:20:02,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:20:02,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-28 05:20:02,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:20:02,980 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-28 05:20:02,981 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-28 05:20:02,981 INFO L87 Difference]: Start difference. First operand 292 states and 427 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 05:20:03,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:20:03,579 INFO L93 Difference]: Finished difference Result 1094 states and 1585 transitions. [2024-11-28 05:20:03,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-28 05:20:03,580 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2024-11-28 05:20:03,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:20:03,593 INFO L225 Difference]: With dead ends: 1094 [2024-11-28 05:20:03,594 INFO L226 Difference]: Without dead ends: 897 [2024-11-28 05:20:03,597 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2024-11-28 05:20:03,598 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 195 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:20:03,598 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 263 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-28 05:20:03,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2024-11-28 05:20:03,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 858. [2024-11-28 05:20:03,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 568 states have (on average 1.2922535211267605) internal successors, (734), 591 states have internal predecessors, (734), 232 states have call successors, (232), 57 states have call predecessors, (232), 57 states have return successors, (226), 209 states have call predecessors, (226), 226 states have call successors, (226) [2024-11-28 05:20:03,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1192 transitions. [2024-11-28 05:20:03,833 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1192 transitions. Word has length 38 [2024-11-28 05:20:03,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:20:03,834 INFO L471 AbstractCegarLoop]: Abstraction has 858 states and 1192 transitions. [2024-11-28 05:20:03,835 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 05:20:03,835 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1192 transitions. [2024-11-28 05:20:03,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-28 05:20:03,836 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:20:03,837 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:20:03,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-28 05:20:04,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:04,041 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:20:04,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:20:04,042 INFO L85 PathProgramCache]: Analyzing trace with hash 324624832, now seen corresponding path program 1 times [2024-11-28 05:20:04,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:20:04,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501515256] [2024-11-28 05:20:04,042 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:20:04,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:20:04,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:20:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:20:04,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:20:04,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501515256] [2024-11-28 05:20:04,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501515256] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:20:04,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185982177] [2024-11-28 05:20:04,206 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:20:04,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:04,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:20:04,210 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:20:04,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-28 05:20:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:20:04,280 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-28 05:20:04,282 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:20:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:20:04,337 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:20:04,448 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:20:04,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185982177] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:20:04,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:20:04,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2024-11-28 05:20:04,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888797780] [2024-11-28 05:20:04,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:20:04,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 05:20:04,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:20:04,451 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 05:20:04,451 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-11-28 05:20:04,451 INFO L87 Difference]: Start difference. First operand 858 states and 1192 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 05:20:04,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:20:04,922 INFO L93 Difference]: Finished difference Result 1267 states and 1779 transitions. [2024-11-28 05:20:04,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 05:20:04,923 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2024-11-28 05:20:04,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:20:04,931 INFO L225 Difference]: With dead ends: 1267 [2024-11-28 05:20:04,932 INFO L226 Difference]: Without dead ends: 863 [2024-11-28 05:20:04,934 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2024-11-28 05:20:04,935 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 117 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:20:04,935 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 236 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 05:20:04,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2024-11-28 05:20:05,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 855. [2024-11-28 05:20:05,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 565 states have (on average 1.2601769911504426) internal successors, (712), 588 states have internal predecessors, (712), 232 states have call successors, (232), 57 states have call predecessors, (232), 57 states have return successors, (226), 209 states have call predecessors, (226), 226 states have call successors, (226) [2024-11-28 05:20:05,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1170 transitions. [2024-11-28 05:20:05,123 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1170 transitions. Word has length 38 [2024-11-28 05:20:05,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:20:05,123 INFO L471 AbstractCegarLoop]: Abstraction has 855 states and 1170 transitions. [2024-11-28 05:20:05,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-28 05:20:05,124 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1170 transitions. [2024-11-28 05:20:05,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-28 05:20:05,126 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:20:05,126 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 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 05:20:05,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-28 05:20:05,331 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:05,331 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:20:05,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:20:05,332 INFO L85 PathProgramCache]: Analyzing trace with hash 139988515, now seen corresponding path program 2 times [2024-11-28 05:20:05,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:20:05,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513070189] [2024-11-28 05:20:05,332 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:20:05,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:20:05,347 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:20:05,347 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:20:05,424 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-28 05:20:05,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:20:05,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513070189] [2024-11-28 05:20:05,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513070189] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:20:05,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:20:05,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:20:05,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419939462] [2024-11-28 05:20:05,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:20:05,426 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:20:05,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:20:05,427 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:20:05,427 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:20:05,427 INFO L87 Difference]: Start difference. First operand 855 states and 1170 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:20:05,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:20:05,715 INFO L93 Difference]: Finished difference Result 1147 states and 1612 transitions. [2024-11-28 05:20:05,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:20:05,715 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2024-11-28 05:20:05,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:20:05,723 INFO L225 Difference]: With dead ends: 1147 [2024-11-28 05:20:05,723 INFO L226 Difference]: Without dead ends: 911 [2024-11-28 05:20:05,725 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:20:05,725 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 30 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:20:05,726 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 181 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:20:05,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2024-11-28 05:20:05,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 803. [2024-11-28 05:20:05,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 533 states have (on average 1.24953095684803) internal successors, (666), 555 states have internal predecessors, (666), 212 states have call successors, (212), 57 states have call predecessors, (212), 57 states have return successors, (206), 190 states have call predecessors, (206), 206 states have call successors, (206) [2024-11-28 05:20:05,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1084 transitions. [2024-11-28 05:20:05,915 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1084 transitions. Word has length 39 [2024-11-28 05:20:05,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:20:05,915 INFO L471 AbstractCegarLoop]: Abstraction has 803 states and 1084 transitions. [2024-11-28 05:20:05,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-28 05:20:05,916 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1084 transitions. [2024-11-28 05:20:05,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-28 05:20:05,917 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:20:05,917 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:20:05,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-28 05:20:05,917 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:20:05,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:20:05,918 INFO L85 PathProgramCache]: Analyzing trace with hash 883594140, now seen corresponding path program 1 times [2024-11-28 05:20:05,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:20:05,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454784227] [2024-11-28 05:20:05,919 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:20:05,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:20:05,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:20:05,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [225121768] [2024-11-28 05:20:05,958 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:20:05,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:05,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:20:05,964 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:20:05,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-28 05:20:06,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:20:06,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-28 05:20:06,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:20:07,307 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 05:20:07,307 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:20:08,134 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 05:20:08,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:20:08,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454784227] [2024-11-28 05:20:08,135 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:20:08,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225121768] [2024-11-28 05:20:08,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225121768] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:20:08,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:20:08,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-11-28 05:20:08,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974383530] [2024-11-28 05:20:08,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:20:08,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 05:20:08,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:20:08,137 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 05:20:08,137 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-11-28 05:20:08,137 INFO L87 Difference]: Start difference. First operand 803 states and 1084 transitions. Second operand has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-28 05:20:13,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:20:13,661 INFO L93 Difference]: Finished difference Result 1218 states and 1723 transitions. [2024-11-28 05:20:13,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-28 05:20:13,662 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 54 [2024-11-28 05:20:13,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:20:13,673 INFO L225 Difference]: With dead ends: 1218 [2024-11-28 05:20:13,673 INFO L226 Difference]: Without dead ends: 1196 [2024-11-28 05:20:13,675 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2024-11-28 05:20:13,676 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 336 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 1127 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-28 05:20:13,677 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 1127 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-28 05:20:13,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2024-11-28 05:20:14,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 885. [2024-11-28 05:20:14,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 592 states have (on average 1.2533783783783783) internal successors, (742), 612 states have internal predecessors, (742), 231 states have call successors, (231), 61 states have call predecessors, (231), 61 states have return successors, (226), 211 states have call predecessors, (226), 226 states have call successors, (226) [2024-11-28 05:20:14,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1199 transitions. [2024-11-28 05:20:14,054 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1199 transitions. Word has length 54 [2024-11-28 05:20:14,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:20:14,055 INFO L471 AbstractCegarLoop]: Abstraction has 885 states and 1199 transitions. [2024-11-28 05:20:14,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2024-11-28 05:20:14,055 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1199 transitions. [2024-11-28 05:20:14,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-28 05:20:14,056 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:20:14,056 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1] [2024-11-28 05:20:14,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-28 05:20:14,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-28 05:20:14,257 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:20:14,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:20:14,258 INFO L85 PathProgramCache]: Analyzing trace with hash -506026557, now seen corresponding path program 1 times [2024-11-28 05:20:14,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:20:14,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093566355] [2024-11-28 05:20:14,259 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:20:14,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:20:14,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:20:14,576 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 05:20:14,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:20:14,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093566355] [2024-11-28 05:20:14,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093566355] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:20:14,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319442747] [2024-11-28 05:20:14,577 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:20:14,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:14,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:20:14,580 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:20:14,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-28 05:20:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:20:14,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 05:20:14,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:20:14,780 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 05:20:14,780 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:20:15,005 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-28 05:20:15,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319442747] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:20:15,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:20:15,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2024-11-28 05:20:15,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245220844] [2024-11-28 05:20:15,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:20:15,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:20:15,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:20:15,009 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:20:15,009 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:20:15,010 INFO L87 Difference]: Start difference. First operand 885 states and 1199 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-28 05:20:16,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:20:16,244 INFO L93 Difference]: Finished difference Result 1906 states and 2713 transitions. [2024-11-28 05:20:16,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-28 05:20:16,245 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) Word has length 60 [2024-11-28 05:20:16,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:20:16,259 INFO L225 Difference]: With dead ends: 1906 [2024-11-28 05:20:16,259 INFO L226 Difference]: Without dead ends: 1884 [2024-11-28 05:20:16,260 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2024-11-28 05:20:16,261 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 300 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:20:16,261 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 342 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 05:20:16,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2024-11-28 05:20:16,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1790. [2024-11-28 05:20:16,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1790 states, 1181 states have (on average 1.2921253175275191) internal successors, (1526), 1241 states have internal predecessors, (1526), 511 states have call successors, (511), 97 states have call predecessors, (511), 97 states have return successors, (502), 451 states have call predecessors, (502), 502 states have call successors, (502) [2024-11-28 05:20:16,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 2539 transitions. [2024-11-28 05:20:16,825 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 2539 transitions. Word has length 60 [2024-11-28 05:20:16,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:20:16,825 INFO L471 AbstractCegarLoop]: Abstraction has 1790 states and 2539 transitions. [2024-11-28 05:20:16,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 5 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (18), 4 states have call predecessors, (18), 4 states have call successors, (18) [2024-11-28 05:20:16,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 2539 transitions. [2024-11-28 05:20:16,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-28 05:20:16,827 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:20:16,827 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:20:16,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-28 05:20:17,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-28 05:20:17,028 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:20:17,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:20:17,029 INFO L85 PathProgramCache]: Analyzing trace with hash 259328120, now seen corresponding path program 1 times [2024-11-28 05:20:17,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:20:17,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908703374] [2024-11-28 05:20:17,029 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:20:17,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:20:17,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:20:17,130 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-11-28 05:20:17,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:20:17,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908703374] [2024-11-28 05:20:17,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908703374] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:20:17,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:20:17,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 05:20:17,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438048408] [2024-11-28 05:20:17,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:20:17,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:20:17,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:20:17,132 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:20:17,132 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-28 05:20:17,132 INFO L87 Difference]: Start difference. First operand 1790 states and 2539 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-28 05:20:17,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:20:17,901 INFO L93 Difference]: Finished difference Result 3149 states and 4464 transitions. [2024-11-28 05:20:17,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:20:17,902 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2024-11-28 05:20:17,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:20:17,914 INFO L225 Difference]: With dead ends: 3149 [2024-11-28 05:20:17,914 INFO L226 Difference]: Without dead ends: 1884 [2024-11-28 05:20:17,919 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 05:20:17,920 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 3 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:20:17,920 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 131 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 05:20:17,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2024-11-28 05:20:18,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1811. [2024-11-28 05:20:18,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1811 states, 1242 states have (on average 1.2954911433172303) internal successors, (1609), 1271 states have internal predecessors, (1609), 471 states have call successors, (471), 97 states have call predecessors, (471), 97 states have return successors, (462), 442 states have call predecessors, (462), 462 states have call successors, (462) [2024-11-28 05:20:18,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1811 states to 1811 states and 2542 transitions. [2024-11-28 05:20:18,481 INFO L78 Accepts]: Start accepts. Automaton has 1811 states and 2542 transitions. Word has length 62 [2024-11-28 05:20:18,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:20:18,481 INFO L471 AbstractCegarLoop]: Abstraction has 1811 states and 2542 transitions. [2024-11-28 05:20:18,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-28 05:20:18,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1811 states and 2542 transitions. [2024-11-28 05:20:18,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-28 05:20:18,482 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:20:18,483 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:20:18,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-28 05:20:18,483 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:20:18,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:20:18,484 INFO L85 PathProgramCache]: Analyzing trace with hash 71362364, now seen corresponding path program 1 times [2024-11-28 05:20:18,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:20:18,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709639154] [2024-11-28 05:20:18,484 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:20:18,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:20:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:20:18,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1578523648] [2024-11-28 05:20:18,508 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:20:18,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:18,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:20:18,511 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:20:18,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-28 05:20:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:20:18,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 05:20:18,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:20:18,699 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2024-11-28 05:20:18,699 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:20:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-11-28 05:20:18,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:20:18,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709639154] [2024-11-28 05:20:18,802 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:20:18,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578523648] [2024-11-28 05:20:18,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578523648] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 05:20:18,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:20:18,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-28 05:20:18,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182996449] [2024-11-28 05:20:18,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:20:18,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 05:20:18,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:20:18,804 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 05:20:18,804 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-28 05:20:18,804 INFO L87 Difference]: Start difference. First operand 1811 states and 2542 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (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 05:20:19,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:20:19,251 INFO L93 Difference]: Finished difference Result 1849 states and 2579 transitions. [2024-11-28 05:20:19,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 05:20:19,252 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (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 63 [2024-11-28 05:20:19,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:20:19,266 INFO L225 Difference]: With dead ends: 1849 [2024-11-28 05:20:19,266 INFO L226 Difference]: Without dead ends: 1847 [2024-11-28 05:20:19,268 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 117 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 05:20:19,272 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 5 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 05:20:19,272 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 129 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 05:20:19,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1847 states. [2024-11-28 05:20:20,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1847 to 1847. [2024-11-28 05:20:20,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1847 states, 1269 states have (on average 1.2876280535855005) internal successors, (1634), 1298 states have internal predecessors, (1634), 471 states have call successors, (471), 106 states have call predecessors, (471), 106 states have return successors, (462), 442 states have call predecessors, (462), 462 states have call successors, (462) [2024-11-28 05:20:20,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1847 states to 1847 states and 2567 transitions. [2024-11-28 05:20:20,019 INFO L78 Accepts]: Start accepts. Automaton has 1847 states and 2567 transitions. Word has length 63 [2024-11-28 05:20:20,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:20:20,020 INFO L471 AbstractCegarLoop]: Abstraction has 1847 states and 2567 transitions. [2024-11-28 05:20:20,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (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 05:20:20,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1847 states and 2567 transitions. [2024-11-28 05:20:20,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-28 05:20:20,021 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:20:20,021 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:20:20,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-28 05:20:20,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:20,226 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:20:20,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:20:20,226 INFO L85 PathProgramCache]: Analyzing trace with hash -82823155, now seen corresponding path program 1 times [2024-11-28 05:20:20,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:20:20,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789554392] [2024-11-28 05:20:20,227 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:20:20,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:20:20,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:20:20,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1641071409] [2024-11-28 05:20:20,260 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:20:20,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:20,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:20:20,263 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:20:20,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-28 05:20:20,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:20:20,346 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-28 05:20:20,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:20:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-28 05:20:21,306 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:20:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-11-28 05:20:22,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:20:22,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789554392] [2024-11-28 05:20:22,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:20:22,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641071409] [2024-11-28 05:20:22,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641071409] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:20:22,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:20:22,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-11-28 05:20:22,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500097489] [2024-11-28 05:20:22,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:20:22,103 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-28 05:20:22,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:20:22,104 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-28 05:20:22,104 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-11-28 05:20:22,104 INFO L87 Difference]: Start difference. First operand 1847 states and 2567 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 20 states have internal predecessors, (62), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-28 05:20:28,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:20:28,770 INFO L93 Difference]: Finished difference Result 2449 states and 3458 transitions. [2024-11-28 05:20:28,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-28 05:20:28,771 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 20 states have internal predecessors, (62), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 64 [2024-11-28 05:20:28,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:20:28,781 INFO L225 Difference]: With dead ends: 2449 [2024-11-28 05:20:28,781 INFO L226 Difference]: Without dead ends: 2447 [2024-11-28 05:20:28,783 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=417, Invalid=1653, Unknown=0, NotChecked=0, Total=2070 [2024-11-28 05:20:28,783 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 235 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 677 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-28 05:20:28,784 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 677 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-11-28 05:20:28,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2024-11-28 05:20:29,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 2317. [2024-11-28 05:20:29,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 1611 states have (on average 1.309124767225326) internal successors, (2109), 1648 states have internal predecessors, (2109), 591 states have call successors, (591), 114 states have call predecessors, (591), 114 states have return successors, (582), 554 states have call predecessors, (582), 582 states have call successors, (582) [2024-11-28 05:20:29,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 3282 transitions. [2024-11-28 05:20:29,620 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 3282 transitions. Word has length 64 [2024-11-28 05:20:29,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:20:29,621 INFO L471 AbstractCegarLoop]: Abstraction has 2317 states and 3282 transitions. [2024-11-28 05:20:29,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 20 states have internal predecessors, (62), 6 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2024-11-28 05:20:29,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 3282 transitions. [2024-11-28 05:20:29,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-28 05:20:29,622 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:20:29,623 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 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 05:20:29,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-28 05:20:29,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:29,827 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:20:29,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:20:29,828 INFO L85 PathProgramCache]: Analyzing trace with hash -394700136, now seen corresponding path program 2 times [2024-11-28 05:20:29,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:20:29,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810814796] [2024-11-28 05:20:29,828 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:20:29,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:20:29,859 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:20:29,859 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:20:29,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1212520559] [2024-11-28 05:20:29,861 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:20:29,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:29,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:20:29,864 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:20:29,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-28 05:20:29,955 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:20:29,955 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:20:29,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-28 05:20:29,961 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:20:30,737 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 05:20:30,737 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:20:30,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:20:30,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810814796] [2024-11-28 05:20:30,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:20:30,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212520559] [2024-11-28 05:20:30,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212520559] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:20:30,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:20:30,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-11-28 05:20:30,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630479007] [2024-11-28 05:20:30,952 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:20:30,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-28 05:20:30,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:20:30,953 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-28 05:20:30,953 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2024-11-28 05:20:30,953 INFO L87 Difference]: Start difference. First operand 2317 states and 3282 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 05:20:32,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:20:32,392 INFO L93 Difference]: Finished difference Result 2432 states and 3440 transitions. [2024-11-28 05:20:32,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-28 05:20:32,393 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 66 [2024-11-28 05:20:32,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:20:32,406 INFO L225 Difference]: With dead ends: 2432 [2024-11-28 05:20:32,406 INFO L226 Difference]: Without dead ends: 2430 [2024-11-28 05:20:32,408 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2024-11-28 05:20:32,409 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 89 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:20:32,410 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 718 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 05:20:32,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2430 states. [2024-11-28 05:20:33,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2430 to 2326. [2024-11-28 05:20:33,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2326 states, 1622 states have (on average 1.3064118372379778) internal successors, (2119), 1660 states have internal predecessors, (2119), 585 states have call successors, (585), 118 states have call predecessors, (585), 118 states have return successors, (576), 547 states have call predecessors, (576), 576 states have call successors, (576) [2024-11-28 05:20:33,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 3280 transitions. [2024-11-28 05:20:33,287 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 3280 transitions. Word has length 66 [2024-11-28 05:20:33,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:20:33,288 INFO L471 AbstractCegarLoop]: Abstraction has 2326 states and 3280 transitions. [2024-11-28 05:20:33,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 14 states have internal predecessors, (44), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-28 05:20:33,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 3280 transitions. [2024-11-28 05:20:33,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-28 05:20:33,289 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:20:33,290 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:20:33,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-28 05:20:33,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:33,494 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:20:33,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:20:33,495 INFO L85 PathProgramCache]: Analyzing trace with hash 123182667, now seen corresponding path program 1 times [2024-11-28 05:20:33,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:20:33,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51474721] [2024-11-28 05:20:33,495 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:20:33,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:20:33,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:20:33,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121033310] [2024-11-28 05:20:33,522 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:20:33,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:33,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:20:33,529 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:20:33,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-28 05:20:33,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:20:33,614 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-28 05:20:33,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:20:34,855 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-11-28 05:20:34,855 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:20:35,764 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 16 proven. 13 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-28 05:20:35,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:20:35,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51474721] [2024-11-28 05:20:35,765 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:20:35,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121033310] [2024-11-28 05:20:35,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121033310] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:20:35,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:20:35,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2024-11-28 05:20:35,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268084625] [2024-11-28 05:20:35,766 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:20:35,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-28 05:20:35,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:20:35,769 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-28 05:20:35,769 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2024-11-28 05:20:35,770 INFO L87 Difference]: Start difference. First operand 2326 states and 3280 transitions. Second operand has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-11-28 05:20:42,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:20:42,414 INFO L93 Difference]: Finished difference Result 2638 states and 3685 transitions. [2024-11-28 05:20:42,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-28 05:20:42,415 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 77 [2024-11-28 05:20:42,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:20:42,436 INFO L225 Difference]: With dead ends: 2638 [2024-11-28 05:20:42,436 INFO L226 Difference]: Without dead ends: 2631 [2024-11-28 05:20:42,438 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=737, Invalid=3045, Unknown=0, NotChecked=0, Total=3782 [2024-11-28 05:20:42,439 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 272 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-28 05:20:42,439 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 991 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-28 05:20:42,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2024-11-28 05:20:44,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 2546. [2024-11-28 05:20:44,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2546 states, 1755 states have (on average 1.2991452991452992) internal successors, (2280), 1794 states have internal predecessors, (2280), 650 states have call successors, (650), 140 states have call predecessors, (650), 140 states have return successors, (644), 611 states have call predecessors, (644), 644 states have call successors, (644) [2024-11-28 05:20:44,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2546 states to 2546 states and 3574 transitions. [2024-11-28 05:20:44,136 INFO L78 Accepts]: Start accepts. Automaton has 2546 states and 3574 transitions. Word has length 77 [2024-11-28 05:20:44,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:20:44,137 INFO L471 AbstractCegarLoop]: Abstraction has 2546 states and 3574 transitions. [2024-11-28 05:20:44,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.5217391304347827) internal successors, (58), 22 states have internal predecessors, (58), 8 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-11-28 05:20:44,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2546 states and 3574 transitions. [2024-11-28 05:20:44,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-11-28 05:20:44,140 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:20:44,140 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:20:44,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-28 05:20:44,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-28 05:20:44,341 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:20:44,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:20:44,342 INFO L85 PathProgramCache]: Analyzing trace with hash -2129784449, now seen corresponding path program 1 times [2024-11-28 05:20:44,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:20:44,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305483221] [2024-11-28 05:20:44,342 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:20:44,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:20:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-28 05:20:44,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175589202] [2024-11-28 05:20:44,391 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:20:44,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:44,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:20:44,395 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:20:44,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-28 05:20:44,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:20:44,498 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-28 05:20:44,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:20:45,416 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 16 proven. 44 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-11-28 05:20:45,416 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:20:45,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:20:45,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305483221] [2024-11-28 05:20:45,672 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:20:45,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175589202] [2024-11-28 05:20:45,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175589202] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:20:45,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-11-28 05:20:45,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-11-28 05:20:45,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707412463] [2024-11-28 05:20:45,673 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-11-28 05:20:45,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-28 05:20:45,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:20:45,674 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-28 05:20:45,674 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2024-11-28 05:20:45,674 INFO L87 Difference]: Start difference. First operand 2546 states and 3574 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 15 states have internal predecessors, (47), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-28 05:20:47,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:20:47,423 INFO L93 Difference]: Finished difference Result 2780 states and 3916 transitions. [2024-11-28 05:20:47,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-28 05:20:47,423 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 15 states have internal predecessors, (47), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) Word has length 89 [2024-11-28 05:20:47,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:20:47,439 INFO L225 Difference]: With dead ends: 2780 [2024-11-28 05:20:47,439 INFO L226 Difference]: Without dead ends: 2778 [2024-11-28 05:20:47,441 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2024-11-28 05:20:47,441 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 108 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:20:47,442 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 463 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-28 05:20:47,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2024-11-28 05:20:48,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 2672. [2024-11-28 05:20:48,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2672 states, 1848 states have (on average 1.3014069264069263) internal successors, (2405), 1889 states have internal predecessors, (2405), 678 states have call successors, (678), 145 states have call predecessors, (678), 145 states have return successors, (672), 637 states have call predecessors, (672), 672 states have call successors, (672) [2024-11-28 05:20:48,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2672 states to 2672 states and 3755 transitions. [2024-11-28 05:20:48,566 INFO L78 Accepts]: Start accepts. Automaton has 2672 states and 3755 transitions. Word has length 89 [2024-11-28 05:20:48,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:20:48,567 INFO L471 AbstractCegarLoop]: Abstraction has 2672 states and 3755 transitions. [2024-11-28 05:20:48,567 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 15 states have internal predecessors, (47), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 4 states have call successors, (10) [2024-11-28 05:20:48,567 INFO L276 IsEmpty]: Start isEmpty. Operand 2672 states and 3755 transitions. [2024-11-28 05:20:48,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-11-28 05:20:48,569 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:20:48,569 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 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] [2024-11-28 05:20:48,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-28 05:20:48,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-28 05:20:48,770 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:20:48,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:20:48,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1671305724, now seen corresponding path program 2 times [2024-11-28 05:20:48,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:20:48,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902098997] [2024-11-28 05:20:48,771 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:20:48,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:20:48,810 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:20:48,810 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:20:48,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1701574536] [2024-11-28 05:20:48,812 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:20:48,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:48,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:20:48,817 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:20:48,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-28 05:20:48,904 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:20:48,904 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:20:48,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-28 05:20:48,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:20:49,324 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2024-11-28 05:20:49,324 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:20:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 29 proven. 17 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-11-28 05:20:49,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:20:49,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902098997] [2024-11-28 05:20:49,816 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:20:49,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701574536] [2024-11-28 05:20:49,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701574536] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:20:49,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:20:49,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-11-28 05:20:49,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268687256] [2024-11-28 05:20:49,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:20:49,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-28 05:20:49,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:20:49,818 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-28 05:20:49,818 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-11-28 05:20:49,819 INFO L87 Difference]: Start difference. First operand 2672 states and 3755 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 18 states have internal predecessors, (57), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-11-28 05:20:53,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:20:53,204 INFO L93 Difference]: Finished difference Result 4020 states and 5906 transitions. [2024-11-28 05:20:53,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-28 05:20:53,209 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 18 states have internal predecessors, (57), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 92 [2024-11-28 05:20:53,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:20:53,247 INFO L225 Difference]: With dead ends: 4020 [2024-11-28 05:20:53,248 INFO L226 Difference]: Without dead ends: 4016 [2024-11-28 05:20:53,250 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2024-11-28 05:20:53,251 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 177 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 05:20:53,251 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 492 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 05:20:53,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4016 states. [2024-11-28 05:20:55,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4016 to 3728. [2024-11-28 05:20:55,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3728 states, 2393 states have (on average 1.3531132469703302) internal successors, (3238), 2454 states have internal predecessors, (3238), 1170 states have call successors, (1170), 165 states have call predecessors, (1170), 164 states have return successors, (1164), 1108 states have call predecessors, (1164), 1164 states have call successors, (1164) [2024-11-28 05:20:55,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 5572 transitions. [2024-11-28 05:20:55,221 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 5572 transitions. Word has length 92 [2024-11-28 05:20:55,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:20:55,221 INFO L471 AbstractCegarLoop]: Abstraction has 3728 states and 5572 transitions. [2024-11-28 05:20:55,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 18 states have internal predecessors, (57), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-11-28 05:20:55,223 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 5572 transitions. [2024-11-28 05:20:55,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-28 05:20:55,225 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:20:55,225 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 3, 3, 3, 3, 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] [2024-11-28 05:20:55,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-28 05:20:55,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-28 05:20:55,426 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:20:55,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:20:55,426 INFO L85 PathProgramCache]: Analyzing trace with hash -382011247, now seen corresponding path program 3 times [2024-11-28 05:20:55,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:20:55,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371244832] [2024-11-28 05:20:55,427 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:20:55,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:20:55,478 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-28 05:20:55,478 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:20:55,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405662079] [2024-11-28 05:20:55,480 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:20:55,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:20:55,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:20:55,483 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:20:55,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-28 05:20:55,583 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 05:20:55,583 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:20:55,589 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-28 05:20:55,593 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:20:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-11-28 05:20:57,162 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:20:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2024-11-28 05:20:58,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:20:58,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371244832] [2024-11-28 05:20:58,531 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:20:58,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405662079] [2024-11-28 05:20:58,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405662079] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:20:58,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:20:58,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2024-11-28 05:20:58,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514729395] [2024-11-28 05:20:58,532 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:20:58,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-28 05:20:58,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:20:58,533 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-28 05:20:58,533 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2024-11-28 05:20:58,534 INFO L87 Difference]: Start difference. First operand 3728 states and 5572 transitions. Second operand has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 27 states have internal predecessors, (82), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-28 05:21:08,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 05:21:13,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 05:21:31,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 05:21:39,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:21:39,750 INFO L93 Difference]: Finished difference Result 6085 states and 9401 transitions. [2024-11-28 05:21:39,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-11-28 05:21:39,751 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 27 states have internal predecessors, (82), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 94 [2024-11-28 05:21:39,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:21:39,787 INFO L225 Difference]: With dead ends: 6085 [2024-11-28 05:21:39,787 INFO L226 Difference]: Without dead ends: 6083 [2024-11-28 05:21:39,793 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4359 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=2608, Invalid=10048, Unknown=0, NotChecked=0, Total=12656 [2024-11-28 05:21:39,794 INFO L435 NwaCegarLoop]: 93 mSDtfsCounter, 523 mSDsluCounter, 1345 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 361 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 1646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2024-11-28 05:21:39,794 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 1438 Invalid, 1646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 1283 Invalid, 2 Unknown, 0 Unchecked, 15.9s Time] [2024-11-28 05:21:39,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6083 states. [2024-11-28 05:21:42,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6083 to 4359. [2024-11-28 05:21:43,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4359 states, 2872 states have (on average 1.3561977715877438) internal successors, (3895), 2937 states have internal predecessors, (3895), 1292 states have call successors, (1292), 195 states have call predecessors, (1292), 194 states have return successors, (1286), 1226 states have call predecessors, (1286), 1286 states have call successors, (1286) [2024-11-28 05:21:43,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4359 states to 4359 states and 6473 transitions. [2024-11-28 05:21:43,020 INFO L78 Accepts]: Start accepts. Automaton has 4359 states and 6473 transitions. Word has length 94 [2024-11-28 05:21:43,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:21:43,021 INFO L471 AbstractCegarLoop]: Abstraction has 4359 states and 6473 transitions. [2024-11-28 05:21:43,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7333333333333334) internal successors, (82), 27 states have internal predecessors, (82), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-11-28 05:21:43,021 INFO L276 IsEmpty]: Start isEmpty. Operand 4359 states and 6473 transitions. [2024-11-28 05:21:43,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-28 05:21:43,023 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:21:43,024 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:21:43,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-28 05:21:43,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-28 05:21:43,224 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:21:43,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:21:43,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1131966787, now seen corresponding path program 3 times [2024-11-28 05:21:43,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:21:43,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854696235] [2024-11-28 05:21:43,225 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:21:43,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:21:43,290 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-28 05:21:43,290 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:21:43,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [421890217] [2024-11-28 05:21:43,292 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:21:43,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:21:43,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:21:43,294 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:21:43,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-28 05:21:43,396 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-28 05:21:43,396 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:21:43,399 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-28 05:21:43,402 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:21:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 54 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-28 05:21:45,170 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:21:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 16 proven. 54 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-28 05:21:46,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:21:46,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854696235] [2024-11-28 05:21:46,813 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:21:46,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421890217] [2024-11-28 05:21:46,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421890217] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:21:46,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:21:46,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2024-11-28 05:21:46,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362300467] [2024-11-28 05:21:46,814 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:21:46,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 05:21:46,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:21:46,815 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 05:21:46,816 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2024-11-28 05:21:46,816 INFO L87 Difference]: Start difference. First operand 4359 states and 6473 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2024-11-28 05:22:06,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 05:22:10,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-11-28 05:22:19,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:22:19,190 INFO L93 Difference]: Finished difference Result 6422 states and 9875 transitions. [2024-11-28 05:22:19,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-11-28 05:22:19,190 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 93 [2024-11-28 05:22:19,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:22:19,232 INFO L225 Difference]: With dead ends: 6422 [2024-11-28 05:22:19,232 INFO L226 Difference]: Without dead ends: 6420 [2024-11-28 05:22:19,239 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 158 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2500 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=1555, Invalid=5755, Unknown=0, NotChecked=0, Total=7310 [2024-11-28 05:22:19,240 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 490 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 309 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.4s IncrementalHoareTripleChecker+Time [2024-11-28 05:22:19,240 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 1117 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 828 Invalid, 2 Unknown, 0 Unchecked, 15.4s Time] [2024-11-28 05:22:19,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6420 states. [2024-11-28 05:22:24,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6420 to 5298. [2024-11-28 05:22:24,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5298 states, 3527 states have (on average 1.3742557414233059) internal successors, (4847), 3598 states have internal predecessors, (4847), 1566 states have call successors, (1566), 205 states have call predecessors, (1566), 204 states have return successors, (1560), 1494 states have call predecessors, (1560), 1560 states have call successors, (1560) [2024-11-28 05:22:24,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5298 states to 5298 states and 7973 transitions. [2024-11-28 05:22:24,415 INFO L78 Accepts]: Start accepts. Automaton has 5298 states and 7973 transitions. Word has length 93 [2024-11-28 05:22:24,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:22:24,416 INFO L471 AbstractCegarLoop]: Abstraction has 5298 states and 7973 transitions. [2024-11-28 05:22:24,416 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2024-11-28 05:22:24,417 INFO L276 IsEmpty]: Start isEmpty. Operand 5298 states and 7973 transitions. [2024-11-28 05:22:24,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-11-28 05:22:24,419 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:22:24,420 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:22:24,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-28 05:22:24,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-28 05:22:24,625 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:22:24,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:22:24,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1812886516, now seen corresponding path program 1 times [2024-11-28 05:22:24,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:22:24,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761790124] [2024-11-28 05:22:24,626 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:22:24,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:22:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:22:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-28 05:22:25,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:22:25,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761790124] [2024-11-28 05:22:25,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761790124] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:22:25,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768296216] [2024-11-28 05:22:25,261 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:22:25,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:22:25,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:22:25,264 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:22:25,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-28 05:22:25,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:22:25,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-28 05:22:25,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:22:25,686 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 108 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-28 05:22:25,687 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:22:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2024-11-28 05:22:26,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768296216] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:22:26,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:22:26,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 24 [2024-11-28 05:22:26,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258382859] [2024-11-28 05:22:26,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:22:26,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 05:22:26,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:22:26,493 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 05:22:26,495 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2024-11-28 05:22:26,495 INFO L87 Difference]: Start difference. First operand 5298 states and 7973 transitions. Second operand has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2024-11-28 05:22:41,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:22:41,202 INFO L93 Difference]: Finished difference Result 14478 states and 23209 transitions. [2024-11-28 05:22:41,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-28 05:22:41,203 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) Word has length 94 [2024-11-28 05:22:41,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:22:41,298 INFO L225 Difference]: With dead ends: 14478 [2024-11-28 05:22:41,299 INFO L226 Difference]: Without dead ends: 12240 [2024-11-28 05:22:41,315 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=585, Invalid=1055, Unknown=0, NotChecked=0, Total=1640 [2024-11-28 05:22:41,316 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 436 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 05:22:41,317 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 474 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 05:22:41,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12240 states. [2024-11-28 05:22:54,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12240 to 11829. [2024-11-28 05:22:54,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11829 states, 7042 states have (on average 1.3994603805737007) internal successors, (9855), 7055 states have internal predecessors, (9855), 4442 states have call successors, (4442), 345 states have call predecessors, (4442), 344 states have return successors, (4430), 4428 states have call predecessors, (4430), 4430 states have call successors, (4430) [2024-11-28 05:22:54,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11829 states to 11829 states and 18727 transitions. [2024-11-28 05:22:54,854 INFO L78 Accepts]: Start accepts. Automaton has 11829 states and 18727 transitions. Word has length 94 [2024-11-28 05:22:54,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:22:54,855 INFO L471 AbstractCegarLoop]: Abstraction has 11829 states and 18727 transitions. [2024-11-28 05:22:54,855 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.9166666666666665) internal successors, (94), 24 states have internal predecessors, (94), 7 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2024-11-28 05:22:54,855 INFO L276 IsEmpty]: Start isEmpty. Operand 11829 states and 18727 transitions. [2024-11-28 05:22:54,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-11-28 05:22:54,858 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:22:54,859 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:22:54,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-28 05:22:55,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-28 05:22:55,060 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:22:55,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:22:55,061 INFO L85 PathProgramCache]: Analyzing trace with hash 897961191, now seen corresponding path program 2 times [2024-11-28 05:22:55,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:22:55,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697613163] [2024-11-28 05:22:55,061 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:22:55,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:22:55,103 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:22:55,103 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:22:55,505 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2024-11-28 05:22:55,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:22:55,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697613163] [2024-11-28 05:22:55,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697613163] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:22:55,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315973304] [2024-11-28 05:22:55,507 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:22:55,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:22:55,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:22:55,510 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:22:55,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-28 05:22:55,633 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:22:55,634 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:22:55,636 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-28 05:22:55,640 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:22:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2024-11-28 05:22:55,918 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:22:56,298 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2024-11-28 05:22:56,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315973304] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:22:56,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:22:56,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2024-11-28 05:22:56,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433719107] [2024-11-28 05:22:56,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:22:56,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-28 05:22:56,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:22:56,301 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-28 05:22:56,301 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-11-28 05:22:56,301 INFO L87 Difference]: Start difference. First operand 11829 states and 18727 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-28 05:23:15,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:23:15,118 INFO L93 Difference]: Finished difference Result 16819 states and 26930 transitions. [2024-11-28 05:23:15,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-28 05:23:15,119 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 95 [2024-11-28 05:23:15,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:23:15,236 INFO L225 Difference]: With dead ends: 16819 [2024-11-28 05:23:15,236 INFO L226 Difference]: Without dead ends: 16034 [2024-11-28 05:23:15,249 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 190 SyntacticMatches, 8 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=292, Invalid=1040, Unknown=0, NotChecked=0, Total=1332 [2024-11-28 05:23:15,249 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 191 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-28 05:23:15,250 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 682 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-28 05:23:15,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16034 states. [2024-11-28 05:23:28,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16034 to 12169. [2024-11-28 05:23:28,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12169 states, 7346 states have (on average 1.3947726653961339) internal successors, (10246), 7359 states have internal predecessors, (10246), 4478 states have call successors, (4478), 345 states have call predecessors, (4478), 344 states have return successors, (4466), 4464 states have call predecessors, (4466), 4466 states have call successors, (4466) [2024-11-28 05:23:28,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12169 states to 12169 states and 19190 transitions. [2024-11-28 05:23:28,170 INFO L78 Accepts]: Start accepts. Automaton has 12169 states and 19190 transitions. Word has length 95 [2024-11-28 05:23:28,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:23:28,170 INFO L471 AbstractCegarLoop]: Abstraction has 12169 states and 19190 transitions. [2024-11-28 05:23:28,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-11-28 05:23:28,171 INFO L276 IsEmpty]: Start isEmpty. Operand 12169 states and 19190 transitions. [2024-11-28 05:23:28,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-11-28 05:23:28,174 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:23:28,175 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:23:28,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-28 05:23:28,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-28 05:23:28,376 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:23:28,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:23:28,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1157573561, now seen corresponding path program 2 times [2024-11-28 05:23:28,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:23:28,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62897540] [2024-11-28 05:23:28,377 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:23:28,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:23:28,422 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:23:28,428 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:23:28,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [499333624] [2024-11-28 05:23:28,430 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:23:28,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:23:28,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:23:28,433 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:23:28,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-28 05:23:28,562 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:23:28,563 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:23:28,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-28 05:23:28,570 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:23:31,537 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 50 proven. 47 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2024-11-28 05:23:31,537 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:23:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 50 proven. 47 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2024-11-28 05:23:35,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:23:35,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62897540] [2024-11-28 05:23:35,326 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:23:35,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499333624] [2024-11-28 05:23:35,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499333624] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:23:35,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:23:35,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2024-11-28 05:23:35,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015610102] [2024-11-28 05:23:35,326 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:23:35,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-28 05:23:35,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:23:35,328 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-28 05:23:35,328 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2024-11-28 05:23:35,329 INFO L87 Difference]: Start difference. First operand 12169 states and 19190 transitions. Second operand has 31 states, 29 states have (on average 2.689655172413793) internal successors, (78), 30 states have internal predecessors, (78), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2024-11-28 05:24:11,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-28 05:24:22,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-28 05:24:29,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-28 05:24:49,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-28 05:24:53,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-28 05:25:00,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-28 05:25:22,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-28 05:26:20,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-11-28 05:26:33,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:26:33,070 INFO L93 Difference]: Finished difference Result 17568 states and 27683 transitions. [2024-11-28 05:26:33,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2024-11-28 05:26:33,071 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.689655172413793) internal successors, (78), 30 states have internal predecessors, (78), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 107 [2024-11-28 05:26:33,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:26:33,179 INFO L225 Difference]: With dead ends: 17568 [2024-11-28 05:26:33,180 INFO L226 Difference]: Without dead ends: 17508 [2024-11-28 05:26:33,193 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6583 ImplicationChecksByTransitivity, 110.2s TimeCoverageRelationStatistics Valid=3203, Invalid=15703, Unknown=0, NotChecked=0, Total=18906 [2024-11-28 05:26:33,195 INFO L435 NwaCegarLoop]: 166 mSDtfsCounter, 573 mSDsluCounter, 2557 mSDsCounter, 0 mSdLazyCounter, 2362 mSolverCounterSat, 442 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 2723 SdHoareTripleChecker+Invalid, 2806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 2362 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.9s IncrementalHoareTripleChecker+Time [2024-11-28 05:26:33,195 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [573 Valid, 2723 Invalid, 2806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 2362 Invalid, 2 Unknown, 0 Unchecked, 40.9s Time] [2024-11-28 05:26:33,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17508 states. [2024-11-28 05:26:54,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17508 to 13148. [2024-11-28 05:26:54,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13148 states, 7971 states have (on average 1.3950570819219672) internal successors, (11120), 7984 states have internal predecessors, (11120), 4810 states have call successors, (4810), 367 states have call predecessors, (4810), 366 states have return successors, (4798), 4796 states have call predecessors, (4798), 4798 states have call successors, (4798) [2024-11-28 05:26:54,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13148 states to 13148 states and 20728 transitions. [2024-11-28 05:26:54,246 INFO L78 Accepts]: Start accepts. Automaton has 13148 states and 20728 transitions. Word has length 107 [2024-11-28 05:26:54,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:26:54,248 INFO L471 AbstractCegarLoop]: Abstraction has 13148 states and 20728 transitions. [2024-11-28 05:26:54,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.689655172413793) internal successors, (78), 30 states have internal predecessors, (78), 11 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2024-11-28 05:26:54,249 INFO L276 IsEmpty]: Start isEmpty. Operand 13148 states and 20728 transitions. [2024-11-28 05:26:54,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-11-28 05:26:54,252 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:26:54,252 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:26:54,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-28 05:26:54,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:54,457 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:26:54,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:26:54,458 INFO L85 PathProgramCache]: Analyzing trace with hash -2039989011, now seen corresponding path program 1 times [2024-11-28 05:26:54,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:26:54,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989760976] [2024-11-28 05:26:54,458 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:26:54,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:26:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:26:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 64 proven. 52 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-28 05:26:54,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:26:54,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989760976] [2024-11-28 05:26:54,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989760976] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:26:54,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045238012] [2024-11-28 05:26:54,991 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:26:54,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:26:54,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:26:54,996 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:26:54,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-28 05:26:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:26:55,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-28 05:26:55,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:26:55,379 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 64 proven. 116 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-11-28 05:26:55,379 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:26:56,138 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 64 proven. 52 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-11-28 05:26:56,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045238012] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:26:56,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:26:56,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 14] total 26 [2024-11-28 05:26:56,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681882412] [2024-11-28 05:26:56,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:26:56,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-28 05:26:56,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:26:56,144 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-28 05:26:56,145 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2024-11-28 05:26:56,145 INFO L87 Difference]: Start difference. First operand 13148 states and 20728 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 7 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2024-11-28 05:27:25,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:27:25,796 INFO L93 Difference]: Finished difference Result 23714 states and 37688 transitions. [2024-11-28 05:27:25,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-28 05:27:25,796 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 7 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) Word has length 106 [2024-11-28 05:27:25,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:27:25,900 INFO L225 Difference]: With dead ends: 23714 [2024-11-28 05:27:25,900 INFO L226 Difference]: Without dead ends: 15621 [2024-11-28 05:27:25,936 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=708, Invalid=1272, Unknown=0, NotChecked=0, Total=1980 [2024-11-28 05:27:25,937 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 557 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-28 05:27:25,937 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 470 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-28 05:27:25,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15621 states. [2024-11-28 05:27:49,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15621 to 15369. [2024-11-28 05:27:49,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15369 states, 9288 states have (on average 1.277454780361757) internal successors, (11865), 9303 states have internal predecessors, (11865), 5664 states have call successors, (5664), 417 states have call predecessors, (5664), 416 states have return successors, (5650), 5648 states have call predecessors, (5650), 5650 states have call successors, (5650) [2024-11-28 05:27:49,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15369 states to 15369 states and 23179 transitions. [2024-11-28 05:27:49,451 INFO L78 Accepts]: Start accepts. Automaton has 15369 states and 23179 transitions. Word has length 106 [2024-11-28 05:27:49,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:27:49,451 INFO L471 AbstractCegarLoop]: Abstraction has 15369 states and 23179 transitions. [2024-11-28 05:27:49,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 7 states have call successors, (31), 5 states have call predecessors, (31), 4 states have return successors, (30), 6 states have call predecessors, (30), 6 states have call successors, (30) [2024-11-28 05:27:49,452 INFO L276 IsEmpty]: Start isEmpty. Operand 15369 states and 23179 transitions. [2024-11-28 05:27:49,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-28 05:27:49,454 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:27:49,454 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:27:49,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-28 05:27:49,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-28 05:27:49,655 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:27:49,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:27:49,655 INFO L85 PathProgramCache]: Analyzing trace with hash -69997885, now seen corresponding path program 3 times [2024-11-28 05:27:49,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:27:49,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127975147] [2024-11-28 05:27:49,655 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:27:49,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:27:49,707 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-28 05:27:49,707 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:27:49,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050857452] [2024-11-28 05:27:49,709 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-28 05:27:49,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:27:49,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:27:49,715 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:27:49,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-28 05:27:49,810 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-28 05:27:49,810 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:27:49,812 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-11-28 05:27:49,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:27:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-11-28 05:27:51,451 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:27:53,467 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-11-28 05:27:53,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:27:53,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127975147] [2024-11-28 05:27:53,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:27:53,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050857452] [2024-11-28 05:27:53,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050857452] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:27:53,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:27:53,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2024-11-28 05:27:53,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386179262] [2024-11-28 05:27:53,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:27:53,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-28 05:27:53,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:27:53,471 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-28 05:27:53,471 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2024-11-28 05:27:53,471 INFO L87 Difference]: Start difference. First operand 15369 states and 23179 transitions. Second operand has 29 states, 27 states have (on average 3.0) internal successors, (81), 28 states have internal predecessors, (81), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2024-11-28 05:29:00,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:29:00,257 INFO L93 Difference]: Finished difference Result 21879 states and 33189 transitions. [2024-11-28 05:29:00,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2024-11-28 05:29:00,258 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 3.0) internal successors, (81), 28 states have internal predecessors, (81), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) Word has length 111 [2024-11-28 05:29:00,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:29:00,359 INFO L225 Difference]: With dead ends: 21879 [2024-11-28 05:29:00,359 INFO L226 Difference]: Without dead ends: 18451 [2024-11-28 05:29:00,379 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 190 SyntacticMatches, 3 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8243 ImplicationChecksByTransitivity, 35.3s TimeCoverageRelationStatistics Valid=3936, Invalid=17820, Unknown=0, NotChecked=0, Total=21756 [2024-11-28 05:29:00,380 INFO L435 NwaCegarLoop]: 99 mSDtfsCounter, 617 mSDsluCounter, 1423 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 467 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-11-28 05:29:00,380 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 1522 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 1028 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2024-11-28 05:29:00,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18451 states. [2024-11-28 05:29:24,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18451 to 15732. [2024-11-28 05:29:24,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15732 states, 9510 states have (on average 1.279179810725552) internal successors, (12165), 9525 states have internal predecessors, (12165), 5796 states have call successors, (5796), 426 states have call predecessors, (5796), 425 states have return successors, (5782), 5780 states have call predecessors, (5782), 5782 states have call successors, (5782) [2024-11-28 05:29:24,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15732 states to 15732 states and 23743 transitions. [2024-11-28 05:29:24,408 INFO L78 Accepts]: Start accepts. Automaton has 15732 states and 23743 transitions. Word has length 111 [2024-11-28 05:29:24,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:29:24,409 INFO L471 AbstractCegarLoop]: Abstraction has 15732 states and 23743 transitions. [2024-11-28 05:29:24,409 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 3.0) internal successors, (81), 28 states have internal predecessors, (81), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2024-11-28 05:29:24,409 INFO L276 IsEmpty]: Start isEmpty. Operand 15732 states and 23743 transitions. [2024-11-28 05:29:24,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-11-28 05:29:24,411 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:29:24,412 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:29:24,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-28 05:29:24,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-28 05:29:24,612 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:29:24,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:29:24,613 INFO L85 PathProgramCache]: Analyzing trace with hash 665078539, now seen corresponding path program 4 times [2024-11-28 05:29:24,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:29:24,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577727600] [2024-11-28 05:29:24,613 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:29:24,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:29:24,639 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:29:24,639 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:29:24,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2012447597] [2024-11-28 05:29:24,641 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:29:24,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:29:24,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:29:24,644 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:29:24,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-28 05:29:24,746 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:29:24,746 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:29:24,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-11-28 05:29:24,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:29:27,080 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 53 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2024-11-28 05:29:27,081 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:29:29,431 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 50 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-11-28 05:29:29,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:29:29,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577727600] [2024-11-28 05:29:29,432 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:29:29,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012447597] [2024-11-28 05:29:29,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012447597] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:29:29,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:29:29,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2024-11-28 05:29:29,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539941979] [2024-11-28 05:29:29,432 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:29:29,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-28 05:29:29,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:29:29,433 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-28 05:29:29,434 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 05:29:29,434 INFO L87 Difference]: Start difference. First operand 15732 states and 23743 transitions. Second operand has 35 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) [2024-11-28 05:30:27,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:30:27,122 INFO L93 Difference]: Finished difference Result 18599 states and 28137 transitions. [2024-11-28 05:30:27,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-11-28 05:30:27,122 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) Word has length 111 [2024-11-28 05:30:27,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:30:27,206 INFO L225 Difference]: With dead ends: 18599 [2024-11-28 05:30:27,206 INFO L226 Difference]: Without dead ends: 18577 [2024-11-28 05:30:27,216 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4580 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=2291, Invalid=12715, Unknown=0, NotChecked=0, Total=15006 [2024-11-28 05:30:27,217 INFO L435 NwaCegarLoop]: 111 mSDtfsCounter, 629 mSDsluCounter, 1793 mSDsCounter, 0 mSdLazyCounter, 1613 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 1904 SdHoareTripleChecker+Invalid, 2053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 1613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:30:27,217 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [629 Valid, 1904 Invalid, 2053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 1613 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2024-11-28 05:30:27,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18577 states. [2024-11-28 05:30:49,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18577 to 15619. [2024-11-28 05:30:49,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15619 states, 9477 states have (on average 1.274664978368682) internal successors, (12080), 9499 states have internal predecessors, (12080), 5686 states have call successors, (5686), 456 states have call predecessors, (5686), 455 states have return successors, (5672), 5663 states have call predecessors, (5672), 5672 states have call successors, (5672) [2024-11-28 05:30:49,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15619 states to 15619 states and 23438 transitions. [2024-11-28 05:30:49,757 INFO L78 Accepts]: Start accepts. Automaton has 15619 states and 23438 transitions. Word has length 111 [2024-11-28 05:30:49,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:30:49,758 INFO L471 AbstractCegarLoop]: Abstraction has 15619 states and 23438 transitions. [2024-11-28 05:30:49,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 2.606060606060606) internal successors, (86), 32 states have internal predecessors, (86), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (28), 8 states have call predecessors, (28), 8 states have call successors, (28) [2024-11-28 05:30:49,758 INFO L276 IsEmpty]: Start isEmpty. Operand 15619 states and 23438 transitions. [2024-11-28 05:30:49,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-11-28 05:30:49,761 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:30:49,761 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:30:49,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-28 05:30:49,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-28 05:30:49,962 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:30:49,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:30:49,962 INFO L85 PathProgramCache]: Analyzing trace with hash 348326399, now seen corresponding path program 4 times [2024-11-28 05:30:49,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:30:49,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984189521] [2024-11-28 05:30:49,962 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:30:49,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:30:49,996 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:30:49,996 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:30:49,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72751574] [2024-11-28 05:30:49,998 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-28 05:30:49,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:30:49,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:30:50,003 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:30:50,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-28 05:30:50,115 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-28 05:30:50,115 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:30:50,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-11-28 05:30:50,122 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:30:52,433 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 50 proven. 107 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-11-28 05:30:52,433 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:30:52,682 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 101 proven. 10 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2024-11-28 05:30:52,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:30:52,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984189521] [2024-11-28 05:30:52,683 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:30:52,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72751574] [2024-11-28 05:30:52,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72751574] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:30:52,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:30:52,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 7] total 27 [2024-11-28 05:30:52,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110716882] [2024-11-28 05:30:52,683 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:30:52,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-28 05:30:52,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:30:52,684 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-28 05:30:52,684 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2024-11-28 05:30:52,685 INFO L87 Difference]: Start difference. First operand 15619 states and 23438 transitions. Second operand has 27 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 25 states have internal predecessors, (96), 8 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2024-11-28 05:31:22,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:31:22,448 INFO L93 Difference]: Finished difference Result 17769 states and 26721 transitions. [2024-11-28 05:31:22,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-28 05:31:22,448 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 25 states have internal predecessors, (96), 8 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 123 [2024-11-28 05:31:22,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:31:22,509 INFO L225 Difference]: With dead ends: 17769 [2024-11-28 05:31:22,509 INFO L226 Difference]: Without dead ends: 17767 [2024-11-28 05:31:22,518 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2024-11-28 05:31:22,518 INFO L435 NwaCegarLoop]: 98 mSDtfsCounter, 173 mSDsluCounter, 1322 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1420 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-28 05:31:22,519 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1420 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1070 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-11-28 05:31:22,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17767 states. [2024-11-28 05:31:45,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17767 to 15981. [2024-11-28 05:31:45,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15981 states, 9776 states have (on average 1.2752659574468086) internal successors, (12467), 9815 states have internal predecessors, (12467), 5712 states have call successors, (5712), 493 states have call predecessors, (5712), 492 states have return successors, (5698), 5672 states have call predecessors, (5698), 5698 states have call successors, (5698) [2024-11-28 05:31:45,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15981 states to 15981 states and 23877 transitions. [2024-11-28 05:31:45,321 INFO L78 Accepts]: Start accepts. Automaton has 15981 states and 23877 transitions. Word has length 123 [2024-11-28 05:31:45,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:31:45,321 INFO L471 AbstractCegarLoop]: Abstraction has 15981 states and 23877 transitions. [2024-11-28 05:31:45,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.5555555555555554) internal successors, (96), 25 states have internal predecessors, (96), 8 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2024-11-28 05:31:45,322 INFO L276 IsEmpty]: Start isEmpty. Operand 15981 states and 23877 transitions. [2024-11-28 05:31:45,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-11-28 05:31:45,325 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:31:45,325 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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 05:31:45,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-11-28 05:31:45,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:31:45,526 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:31:45,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:31:45,526 INFO L85 PathProgramCache]: Analyzing trace with hash 117355431, now seen corresponding path program 5 times [2024-11-28 05:31:45,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:31:45,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264191656] [2024-11-28 05:31:45,527 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:31:45,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:31:45,579 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-11-28 05:31:45,581 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:31:45,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [554397894] [2024-11-28 05:31:45,582 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:31:45,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:31:45,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:31:45,587 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:31:45,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-28 05:31:45,736 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-11-28 05:31:45,736 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:31:45,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-28 05:31:45,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:31:47,306 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 32 proven. 55 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2024-11-28 05:31:47,306 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:31:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 32 proven. 55 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2024-11-28 05:31:48,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:31:48,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264191656] [2024-11-28 05:31:48,564 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:31:48,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554397894] [2024-11-28 05:31:48,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554397894] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:31:48,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:31:48,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2024-11-28 05:31:48,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444786969] [2024-11-28 05:31:48,565 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:31:48,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-28 05:31:48,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:31:48,566 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-28 05:31:48,566 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2024-11-28 05:31:48,566 INFO L87 Difference]: Start difference. First operand 15981 states and 23877 transitions. Second operand has 24 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 23 states have internal predecessors, (73), 11 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2024-11-28 05:32:21,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:32:21,717 INFO L93 Difference]: Finished difference Result 17822 states and 26641 transitions. [2024-11-28 05:32:21,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-28 05:32:21,717 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 23 states have internal predecessors, (73), 11 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 127 [2024-11-28 05:32:21,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:32:21,769 INFO L225 Difference]: With dead ends: 17822 [2024-11-28 05:32:21,769 INFO L226 Difference]: Without dead ends: 17782 [2024-11-28 05:32:21,774 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 228 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=809, Invalid=3351, Unknown=0, NotChecked=0, Total=4160 [2024-11-28 05:32:21,775 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 316 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 1249 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 1306 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 1249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-11-28 05:32:21,775 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 1306 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 1249 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-11-28 05:32:21,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17782 states. [2024-11-28 05:32:48,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17782 to 16420. [2024-11-28 05:32:48,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16420 states, 10050 states have (on average 1.2716417910447761) internal successors, (12780), 10096 states have internal predecessors, (12780), 5846 states have call successors, (5846), 524 states have call predecessors, (5846), 523 states have return successors, (5832), 5799 states have call predecessors, (5832), 5832 states have call successors, (5832) [2024-11-28 05:32:48,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16420 states to 16420 states and 24458 transitions. [2024-11-28 05:32:48,443 INFO L78 Accepts]: Start accepts. Automaton has 16420 states and 24458 transitions. Word has length 127 [2024-11-28 05:32:48,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:32:48,444 INFO L471 AbstractCegarLoop]: Abstraction has 16420 states and 24458 transitions. [2024-11-28 05:32:48,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 23 states have internal predecessors, (73), 11 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2024-11-28 05:32:48,444 INFO L276 IsEmpty]: Start isEmpty. Operand 16420 states and 24458 transitions. [2024-11-28 05:32:48,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-28 05:32:48,448 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:32:48,448 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:32:48,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-28 05:32:48,648 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-28 05:32:48,649 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:32:48,649 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:32:48,649 INFO L85 PathProgramCache]: Analyzing trace with hash -14191919, now seen corresponding path program 5 times [2024-11-28 05:32:48,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:32:48,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470373442] [2024-11-28 05:32:48,650 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:32:48,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:32:48,687 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-28 05:32:48,687 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-28 05:32:48,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650036836] [2024-11-28 05:32:48,689 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-28 05:32:48,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:32:48,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:32:48,692 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:32:48,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-28 05:32:48,898 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-28 05:32:48,898 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:32:48,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-11-28 05:32:48,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:32:52,828 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 97 proven. 137 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2024-11-28 05:32:52,828 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:32:54,491 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 145 proven. 21 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-11-28 05:32:54,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:32:54,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470373442] [2024-11-28 05:32:54,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-28 05:32:54,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650036836] [2024-11-28 05:32:54,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650036836] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:32:54,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 05:32:54,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 12] total 34 [2024-11-28 05:32:54,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070182551] [2024-11-28 05:32:54,492 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 05:32:54,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-28 05:32:54,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:32:54,493 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-28 05:32:54,494 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2024-11-28 05:32:54,494 INFO L87 Difference]: Start difference. First operand 16420 states and 24458 transitions. Second operand has 34 states, 31 states have (on average 3.193548387096774) internal successors, (99), 27 states have internal predecessors, (99), 13 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 9 states have call predecessors, (24), 11 states have call successors, (24) [2024-11-28 05:33:27,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 05:33:27,018 INFO L93 Difference]: Finished difference Result 17863 states and 26306 transitions. [2024-11-28 05:33:27,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-28 05:33:27,019 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 3.193548387096774) internal successors, (99), 27 states have internal predecessors, (99), 13 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 9 states have call predecessors, (24), 11 states have call successors, (24) Word has length 128 [2024-11-28 05:33:27,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 05:33:27,074 INFO L225 Difference]: With dead ends: 17863 [2024-11-28 05:33:27,074 INFO L226 Difference]: Without dead ends: 17857 [2024-11-28 05:33:27,080 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=633, Invalid=3789, Unknown=0, NotChecked=0, Total=4422 [2024-11-28 05:33:27,080 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 251 mSDsluCounter, 1531 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 1621 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-28 05:33:27,081 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 1621 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1451 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-28 05:33:27,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17857 states. [2024-11-28 05:33:52,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17857 to 17732. [2024-11-28 05:33:52,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17732 states, 10936 states have (on average 1.2656364301389904) internal successors, (13841), 10992 states have internal predecessors, (13841), 6166 states have call successors, (6166), 630 states have call predecessors, (6166), 629 states have return successors, (6154), 6109 states have call predecessors, (6154), 6154 states have call successors, (6154) [2024-11-28 05:33:52,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17732 states to 17732 states and 26161 transitions. [2024-11-28 05:33:52,717 INFO L78 Accepts]: Start accepts. Automaton has 17732 states and 26161 transitions. Word has length 128 [2024-11-28 05:33:52,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 05:33:52,718 INFO L471 AbstractCegarLoop]: Abstraction has 17732 states and 26161 transitions. [2024-11-28 05:33:52,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 3.193548387096774) internal successors, (99), 27 states have internal predecessors, (99), 13 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 9 states have call predecessors, (24), 11 states have call successors, (24) [2024-11-28 05:33:52,718 INFO L276 IsEmpty]: Start isEmpty. Operand 17732 states and 26161 transitions. [2024-11-28 05:33:52,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-11-28 05:33:52,722 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 05:33:52,722 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 7, 7, 5, 4, 4, 4, 4, 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] [2024-11-28 05:33:52,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-11-28 05:33:52,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:33:52,926 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 05:33:52,926 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:33:52,926 INFO L85 PathProgramCache]: Analyzing trace with hash 375993539, now seen corresponding path program 2 times [2024-11-28 05:33:52,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:33:52,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585816047] [2024-11-28 05:33:52,926 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:33:52,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:33:52,947 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:33:52,947 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:33:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 119 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-11-28 05:33:53,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:33:53,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585816047] [2024-11-28 05:33:53,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585816047] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:33:53,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391026710] [2024-11-28 05:33:53,738 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:33:53,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:33:53,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:33:53,741 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:33:53,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7a032c8-d60d-44e4-8f83-b73efe2c69ed/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-28 05:33:53,860 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:33:53,860 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:33:53,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-28 05:33:53,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:33:54,182 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 311 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-28 05:33:54,183 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:33:55,022 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 24 proven. 119 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2024-11-28 05:33:55,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391026710] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:33:55,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:33:55,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 18] total 35 [2024-11-28 05:33:55,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180810562] [2024-11-28 05:33:55,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:33:55,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-28 05:33:55,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:33:55,024 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-28 05:33:55,025 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=671, Unknown=0, NotChecked=0, Total=1190 [2024-11-28 05:33:55,025 INFO L87 Difference]: Start difference. First operand 17732 states and 26161 transitions. Second operand has 35 states, 35 states have (on average 3.742857142857143) internal successors, (131), 35 states have internal predecessors, (131), 9 states have call successors, (43), 6 states have call predecessors, (43), 5 states have return successors, (42), 8 states have call predecessors, (42), 8 states have call successors, (42)