./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound20.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_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/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_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/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_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/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 e51b21c2da790a7136d7ad701fd2bec1367e3ae6dd3a60c613fa7cfa4db22905 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 20:08:12,189 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 20:08:12,288 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 20:08:12,294 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 20:08:12,294 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 20:08:12,317 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 20:08:12,318 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 20:08:12,318 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 20:08:12,318 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 20:08:12,318 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 20:08:12,319 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 20:08:12,319 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 20:08:12,319 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 20:08:12,319 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 20:08:12,319 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 20:08:12,319 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 20:08:12,319 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 20:08:12,319 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 20:08:12,320 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 20:08:12,320 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 20:08:12,320 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 20:08:12,320 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 20:08:12,320 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 20:08:12,320 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 20:08:12,320 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 20:08:12,320 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 20:08:12,320 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 20:08:12,320 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 20:08:12,321 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 20:08:12,321 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:08:12,321 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:08:12,321 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:08:12,321 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:08:12,321 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 20:08:12,321 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 20:08:12,321 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 20:08:12,321 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 20:08:12,321 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:08:12,322 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 20:08:12,322 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 20:08:12,322 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 20:08:12,322 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 20:08:12,322 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 20:08:12,322 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 20:08:12,322 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 20:08:12,322 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 20:08:12,322 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 20:08:12,322 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 20:08:12,322 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_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/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 -> e51b21c2da790a7136d7ad701fd2bec1367e3ae6dd3a60c613fa7cfa4db22905 [2024-11-27 20:08:12,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 20:08:12,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 20:08:12,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 20:08:12,642 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 20:08:12,643 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 20:08:12,644 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound20.c [2024-11-27 20:08:15,724 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/data/ac78b65e0/4f984cdd409c4a74a34eed93d41c3d4a/FLAG78af1dc98 [2024-11-27 20:08:16,026 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 20:08:16,027 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound20.c [2024-11-27 20:08:16,037 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/data/ac78b65e0/4f984cdd409c4a74a34eed93d41c3d4a/FLAG78af1dc98 [2024-11-27 20:08:16,056 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/data/ac78b65e0/4f984cdd409c4a74a34eed93d41c3d4a [2024-11-27 20:08:16,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 20:08:16,060 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 20:08:16,062 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 20:08:16,062 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 20:08:16,066 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 20:08:16,067 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:08:16" (1/1) ... [2024-11-27 20:08:16,068 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cbfd759 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:16, skipping insertion in model container [2024-11-27 20:08:16,068 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 08:08:16" (1/1) ... [2024-11-27 20:08:16,084 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 20:08:16,257 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_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound20.c[458,471] [2024-11-27 20:08:16,278 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:08:16,290 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 20:08:16,301 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_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound20.c[458,471] [2024-11-27 20:08:16,308 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 20:08:16,325 INFO L204 MainTranslator]: Completed translation [2024-11-27 20:08:16,325 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:16 WrapperNode [2024-11-27 20:08:16,325 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 20:08:16,326 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 20:08:16,327 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 20:08:16,327 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 20:08:16,334 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:16" (1/1) ... [2024-11-27 20:08:16,340 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:16" (1/1) ... [2024-11-27 20:08:16,360 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2024-11-27 20:08:16,361 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 20:08:16,362 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 20:08:16,364 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 20:08:16,364 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 20:08:16,374 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:16" (1/1) ... [2024-11-27 20:08:16,374 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:16" (1/1) ... [2024-11-27 20:08:16,380 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:16" (1/1) ... [2024-11-27 20:08:16,392 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]. [2024-11-27 20:08:16,393 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:16" (1/1) ... [2024-11-27 20:08:16,393 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:16" (1/1) ... [2024-11-27 20:08:16,395 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:16" (1/1) ... [2024-11-27 20:08:16,396 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:16" (1/1) ... [2024-11-27 20:08:16,400 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:16" (1/1) ... [2024-11-27 20:08:16,401 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:16" (1/1) ... [2024-11-27 20:08:16,402 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:16" (1/1) ... [2024-11-27 20:08:16,403 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 20:08:16,404 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 20:08:16,404 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 20:08:16,404 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 20:08:16,406 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:16" (1/1) ... [2024-11-27 20:08:16,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 20:08:16,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:16,448 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 20:08:16,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 20:08:16,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 20:08:16,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 20:08:16,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 20:08:16,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 20:08:16,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-11-27 20:08:16,487 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-11-27 20:08:16,549 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 20:08:16,551 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 20:08:16,736 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-11-27 20:08:16,738 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 20:08:16,754 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 20:08:16,756 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-27 20:08:16,756 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:08:16 BoogieIcfgContainer [2024-11-27 20:08:16,757 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 20:08:16,761 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 20:08:16,762 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 20:08:16,768 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 20:08:16,768 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 08:08:16" (1/3) ... [2024-11-27 20:08:16,769 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db5e0b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:08:16, skipping insertion in model container [2024-11-27 20:08:16,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 08:08:16" (2/3) ... [2024-11-27 20:08:16,772 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3db5e0b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 08:08:16, skipping insertion in model container [2024-11-27 20:08:16,772 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 08:08:16" (3/3) ... [2024-11-27 20:08:16,773 INFO L128 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound20.c [2024-11-27 20:08:16,793 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 20:08:16,797 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG ps5-ll_unwindbound20.c that has 2 procedures, 20 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-11-27 20:08:16,873 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 20:08:16,890 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;@ac25642, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 20:08:16,891 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-27 20:08:16,896 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 20:08:16,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-27 20:08:16,903 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:16,905 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:16,905 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:16,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:16,913 INFO L85 PathProgramCache]: Analyzing trace with hash -579246775, now seen corresponding path program 1 times [2024-11-27 20:08:16,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:16,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115011949] [2024-11-27 20:08:16,926 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:16,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:17,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:17,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:08:17,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:17,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115011949] [2024-11-27 20:08:17,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115011949] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:08:17,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:08:17,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 20:08:17,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982527583] [2024-11-27 20:08:17,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:17,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-27 20:08:17,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:17,122 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-27 20:08:17,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 20:08:17,124 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:17,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:17,143 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2024-11-27 20:08:17,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-27 20:08:17,145 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-27 20:08:17,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:17,152 INFO L225 Difference]: With dead ends: 37 [2024-11-27 20:08:17,152 INFO L226 Difference]: Without dead ends: 16 [2024-11-27 20:08:17,156 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-27 20:08:17,164 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:17,169 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:08:17,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-27 20:08:17,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-11-27 20:08:17,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 20:08:17,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2024-11-27 20:08:17,211 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2024-11-27 20:08:17,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:17,214 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2024-11-27 20:08:17,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:17,214 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2024-11-27 20:08:17,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-27 20:08:17,215 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:17,215 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:17,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 20:08:17,216 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:17,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:17,216 INFO L85 PathProgramCache]: Analyzing trace with hash -2016163457, now seen corresponding path program 1 times [2024-11-27 20:08:17,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:17,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696422745] [2024-11-27 20:08:17,217 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:17,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:17,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 20:08:17,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671597210] [2024-11-27 20:08:17,253 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:17,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:17,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:17,255 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:08:17,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 20:08:17,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:17,329 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 20:08:17,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:08:17,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:08:17,486 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:08:17,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:17,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696422745] [2024-11-27 20:08:17,487 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 20:08:17,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671597210] [2024-11-27 20:08:17,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671597210] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:08:17,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:08:17,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 20:08:17,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895606525] [2024-11-27 20:08:17,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:17,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:08:17,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:17,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:08:17,492 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:08:17,492 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:17,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:17,587 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2024-11-27 20:08:17,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:08:17,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-27 20:08:17,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:17,589 INFO L225 Difference]: With dead ends: 28 [2024-11-27 20:08:17,589 INFO L226 Difference]: Without dead ends: 24 [2024-11-27 20:08:17,589 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 20:08:17,591 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:17,591 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 53 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:08:17,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-27 20:08:17,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-11-27 20:08:17,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 20:08:17,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-11-27 20:08:17,606 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2024-11-27 20:08:17,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:17,606 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-11-27 20:08:17,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:08:17,606 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-11-27 20:08:17,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-27 20:08:17,608 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:17,608 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:17,619 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 20:08:17,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:17,812 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:17,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:17,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1286351555, now seen corresponding path program 1 times [2024-11-27 20:08:17,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:17,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539916936] [2024-11-27 20:08:17,813 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:17,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:17,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 20:08:17,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1157311772] [2024-11-27 20:08:17,873 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:17,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:17,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:17,875 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:08:17,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 20:08:17,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:17,935 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 20:08:17,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:08:18,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 20:08:18,084 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:08:18,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 20:08:18,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:18,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539916936] [2024-11-27 20:08:18,241 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 20:08:18,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157311772] [2024-11-27 20:08:18,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157311772] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 20:08:18,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 20:08:18,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-11-27 20:08:18,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738597677] [2024-11-27 20:08:18,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:08:18,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:08:18,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:18,246 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:08:18,246 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-27 20:08:18,247 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 20:08:18,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:18,318 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2024-11-27 20:08:18,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 20:08:18,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-11-27 20:08:18,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:18,321 INFO L225 Difference]: With dead ends: 30 [2024-11-27 20:08:18,322 INFO L226 Difference]: Without dead ends: 26 [2024-11-27 20:08:18,323 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:08:18,324 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:18,325 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 47 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 20:08:18,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-27 20:08:18,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-27 20:08:18,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 20:08:18,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2024-11-27 20:08:18,342 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2024-11-27 20:08:18,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:18,343 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2024-11-27 20:08:18,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 20:08:18,343 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2024-11-27 20:08:18,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-27 20:08:18,344 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:18,344 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:18,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-27 20:08:18,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:18,550 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:18,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:18,551 INFO L85 PathProgramCache]: Analyzing trace with hash -603194079, now seen corresponding path program 1 times [2024-11-27 20:08:18,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:18,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922661928] [2024-11-27 20:08:18,551 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:18,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:18,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:08:18,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:18,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922661928] [2024-11-27 20:08:18,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922661928] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:08:18,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648328020] [2024-11-27 20:08:18,761 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:18,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:18,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:18,764 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:08:18,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 20:08:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:18,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 20:08:18,817 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:08:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 20:08:18,852 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:08:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-27 20:08:18,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648328020] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:08:18,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:08:18,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2024-11-27 20:08:18,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384251794] [2024-11-27 20:08:18,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:08:18,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 20:08:18,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:18,913 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 20:08:18,913 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-27 20:08:18,913 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 20:08:19,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:19,030 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2024-11-27 20:08:19,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 20:08:19,031 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 23 [2024-11-27 20:08:19,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:19,033 INFO L225 Difference]: With dead ends: 66 [2024-11-27 20:08:19,034 INFO L226 Difference]: Without dead ends: 56 [2024-11-27 20:08:19,034 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-27 20:08:19,035 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:19,036 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 67 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:08:19,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-27 20:08:19,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2024-11-27 20:08:19,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-11-27 20:08:19,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2024-11-27 20:08:19,066 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 23 [2024-11-27 20:08:19,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:19,066 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2024-11-27 20:08:19,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 20:08:19,066 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2024-11-27 20:08:19,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-27 20:08:19,069 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:19,069 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:19,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 20:08:19,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:19,270 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:19,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:19,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1681809180, now seen corresponding path program 1 times [2024-11-27 20:08:19,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:19,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80229461] [2024-11-27 20:08:19,271 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:19,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-27 20:08:19,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [994748361] [2024-11-27 20:08:19,314 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:08:19,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:19,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:19,321 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:08:19,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 20:08:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:08:19,389 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-27 20:08:19,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:08:19,571 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 20:08:19,571 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:08:19,750 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-27 20:08:19,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:19,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80229461] [2024-11-27 20:08:19,750 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 20:08:19,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994748361] [2024-11-27 20:08:19,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994748361] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:08:19,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:08:19,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2024-11-27 20:08:19,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999403599] [2024-11-27 20:08:19,751 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:08:19,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 20:08:19,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:19,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 20:08:19,755 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-27 20:08:19,755 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 12 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 20:08:19,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:19,962 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2024-11-27 20:08:19,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 20:08:19,963 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 29 [2024-11-27 20:08:19,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:19,964 INFO L225 Difference]: With dead ends: 55 [2024-11-27 20:08:19,964 INFO L226 Difference]: Without dead ends: 46 [2024-11-27 20:08:19,964 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-11-27 20:08:19,967 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:19,967 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 139 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:08:19,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-27 20:08:19,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-11-27 20:08:19,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 20:08:19,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2024-11-27 20:08:19,993 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 29 [2024-11-27 20:08:19,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:19,994 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2024-11-27 20:08:19,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 20:08:19,994 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2024-11-27 20:08:19,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-27 20:08:19,998 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:19,998 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:20,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-27 20:08:20,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:20,202 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:20,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:20,203 INFO L85 PathProgramCache]: Analyzing trace with hash 2096328917, now seen corresponding path program 2 times [2024-11-27 20:08:20,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:20,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169173836] [2024-11-27 20:08:20,203 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:08:20,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:20,257 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:08:20,258 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:08:20,628 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-27 20:08:20,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:20,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169173836] [2024-11-27 20:08:20,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169173836] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 20:08:20,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577357270] [2024-11-27 20:08:20,629 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:08:20,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:20,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:20,632 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:08:20,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 20:08:20,695 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:08:20,696 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:08:20,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 20:08:20,700 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:08:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 20:08:20,783 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:08:20,943 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-27 20:08:20,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577357270] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:08:20,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 20:08:20,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2024-11-27 20:08:20,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246983995] [2024-11-27 20:08:20,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 20:08:20,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 20:08:20,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:20,945 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 20:08:20,945 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-11-27 20:08:20,946 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) [2024-11-27 20:08:21,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:21,267 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2024-11-27 20:08:21,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-27 20:08:21,268 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) Word has length 47 [2024-11-27 20:08:21,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:21,270 INFO L225 Difference]: With dead ends: 132 [2024-11-27 20:08:21,270 INFO L226 Difference]: Without dead ends: 122 [2024-11-27 20:08:21,270 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2024-11-27 20:08:21,271 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 77 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:21,272 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 100 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 20:08:21,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-11-27 20:08:21,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2024-11-27 20:08:21,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 74 states have internal predecessors, (76), 17 states have call successors, (17), 11 states have call predecessors, (17), 10 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) [2024-11-27 20:08:21,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2024-11-27 20:08:21,310 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 47 [2024-11-27 20:08:21,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:21,311 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2024-11-27 20:08:21,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (14), 9 states have call predecessors, (14), 9 states have call successors, (14) [2024-11-27 20:08:21,311 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2024-11-27 20:08:21,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-27 20:08:21,312 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:21,313 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:21,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-27 20:08:21,517 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:21,518 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:21,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:21,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1374191000, now seen corresponding path program 2 times [2024-11-27 20:08:21,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:21,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220850030] [2024-11-27 20:08:21,518 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:08:21,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:21,619 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:08:21,619 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 20:08:21,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [544462904] [2024-11-27 20:08:21,621 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:08:21,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:21,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:21,627 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:08:21,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 20:08:21,700 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 20:08:21,700 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:08:21,702 INFO L256 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-27 20:08:21,706 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:08:22,086 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-27 20:08:22,087 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:08:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 12 proven. 40 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-11-27 20:08:22,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 20:08:22,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220850030] [2024-11-27 20:08:22,540 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-27 20:08:22,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544462904] [2024-11-27 20:08:22,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544462904] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:08:22,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:08:22,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2024-11-27 20:08:22,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539492462] [2024-11-27 20:08:22,541 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:08:22,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-27 20:08:22,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 20:08:22,542 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-27 20:08:22,543 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2024-11-27 20:08:22,543 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand has 20 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-27 20:08:23,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 20:08:23,191 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2024-11-27 20:08:23,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-27 20:08:23,193 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 53 [2024-11-27 20:08:23,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 20:08:23,194 INFO L225 Difference]: With dead ends: 103 [2024-11-27 20:08:23,194 INFO L226 Difference]: Without dead ends: 92 [2024-11-27 20:08:23,195 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2024-11-27 20:08:23,196 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 20:08:23,196 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 325 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 20:08:23,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-27 20:08:23,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2024-11-27 20:08:23,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-11-27 20:08:23,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2024-11-27 20:08:23,239 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 53 [2024-11-27 20:08:23,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 20:08:23,241 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2024-11-27 20:08:23,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-11-27 20:08:23,242 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2024-11-27 20:08:23,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-11-27 20:08:23,243 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 20:08:23,243 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:08:23,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-27 20:08:23,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-27 20:08:23,444 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 20:08:23,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:08:23,445 INFO L85 PathProgramCache]: Analyzing trace with hash 716280516, now seen corresponding path program 3 times [2024-11-27 20:08:23,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 20:08:23,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566020890] [2024-11-27 20:08:23,445 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:08:23,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 20:08:23,607 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-27 20:08:23,610 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-11-27 20:08:23,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1445467701] [2024-11-27 20:08:23,613 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 20:08:23,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:08:23,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:08:23,618 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:08:23,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b376fc51-5561-4d6a-a14d-f97fb5d2a9d0/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process