./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-4.i --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_90565031-70bc-4df0-9724-917c24b007be/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90565031-70bc-4df0-9724-917c24b007be/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90565031-70bc-4df0-9724-917c24b007be/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90565031-70bc-4df0-9724-917c24b007be/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-4.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90565031-70bc-4df0-9724-917c24b007be/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90565031-70bc-4df0-9724-917c24b007be/bin/uautomizer-verify-84ZbGMXZE1 --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 ba5f0caf23a8553b85ea9b0e3b56d4287012b5199113e94bf771c5d2d4836944 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 14:24:15,255 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 14:24:15,311 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90565031-70bc-4df0-9724-917c24b007be/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-12-02 14:24:15,316 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 14:24:15,316 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 14:24:15,337 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 14:24:15,338 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 14:24:15,338 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 14:24:15,338 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 14:24:15,338 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 14:24:15,338 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 14:24:15,338 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 14:24:15,339 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 14:24:15,339 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 14:24:15,339 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 14:24:15,339 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 14:24:15,339 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 14:24:15,339 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 14:24:15,339 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 14:24:15,339 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 14:24:15,339 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 14:24:15,339 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 14:24:15,340 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 14:24:15,340 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 14:24:15,340 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 14:24:15,340 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 14:24:15,340 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 14:24:15,340 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 14:24:15,340 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 14:24:15,340 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 14:24:15,340 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 14:24:15,340 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 14:24:15,340 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 14:24:15,340 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 14:24:15,340 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 14:24:15,340 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 14:24:15,341 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 14:24:15,341 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 14:24:15,341 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 14:24:15,341 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 14:24:15,341 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 14:24:15,341 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 14:24:15,341 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 14:24:15,341 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 14:24:15,341 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 14:24:15,341 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 14:24:15,341 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 14:24:15,341 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 14:24:15,341 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_90565031-70bc-4df0-9724-917c24b007be/bin/uautomizer-verify-84ZbGMXZE1 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 -> ba5f0caf23a8553b85ea9b0e3b56d4287012b5199113e94bf771c5d2d4836944 [2024-12-02 14:24:15,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 14:24:15,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 14:24:15,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 14:24:15,594 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 14:24:15,595 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 14:24:15,596 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90565031-70bc-4df0-9724-917c24b007be/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-4.i [2024-12-02 14:24:18,266 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90565031-70bc-4df0-9724-917c24b007be/bin/uautomizer-verify-84ZbGMXZE1/data/b8d58524c/6dde3c0daa234d47927c5c1c4aa01707/FLAG46661a074 [2024-12-02 14:24:18,462 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 14:24:18,463 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90565031-70bc-4df0-9724-917c24b007be/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-4.i [2024-12-02 14:24:18,471 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90565031-70bc-4df0-9724-917c24b007be/bin/uautomizer-verify-84ZbGMXZE1/data/b8d58524c/6dde3c0daa234d47927c5c1c4aa01707/FLAG46661a074 [2024-12-02 14:24:18,829 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90565031-70bc-4df0-9724-917c24b007be/bin/uautomizer-verify-84ZbGMXZE1/data/b8d58524c/6dde3c0daa234d47927c5c1c4aa01707 [2024-12-02 14:24:18,831 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 14:24:18,832 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 14:24:18,833 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 14:24:18,833 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 14:24:18,836 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 14:24:18,836 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:24:18" (1/1) ... [2024-12-02 14:24:18,837 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36060f85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:18, skipping insertion in model container [2024-12-02 14:24:18,837 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:24:18" (1/1) ... [2024-12-02 14:24:18,847 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 14:24:18,940 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_90565031-70bc-4df0-9724-917c24b007be/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-4.i[914,927] [2024-12-02 14:24:18,975 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 14:24:18,984 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 14:24:18,992 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_90565031-70bc-4df0-9724-917c24b007be/sv-benchmarks/c/hardness-nfm22/hardness_loopvsstraightlinecode_25-while_file-4.i[914,927] [2024-12-02 14:24:19,007 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 14:24:19,018 INFO L204 MainTranslator]: Completed translation [2024-12-02 14:24:19,018 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:19 WrapperNode [2024-12-02 14:24:19,019 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 14:24:19,019 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 14:24:19,019 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 14:24:19,019 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 14:24:19,024 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:19" (1/1) ... [2024-12-02 14:24:19,030 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:19" (1/1) ... [2024-12-02 14:24:19,051 INFO L138 Inliner]: procedures = 26, calls = 28, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 98 [2024-12-02 14:24:19,051 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 14:24:19,052 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 14:24:19,052 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 14:24:19,052 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 14:24:19,061 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:19" (1/1) ... [2024-12-02 14:24:19,062 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:19" (1/1) ... [2024-12-02 14:24:19,064 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:19" (1/1) ... [2024-12-02 14:24:19,077 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]. [2024-12-02 14:24:19,077 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:19" (1/1) ... [2024-12-02 14:24:19,078 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:19" (1/1) ... [2024-12-02 14:24:19,082 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:19" (1/1) ... [2024-12-02 14:24:19,083 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:19" (1/1) ... [2024-12-02 14:24:19,086 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:19" (1/1) ... [2024-12-02 14:24:19,088 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:19" (1/1) ... [2024-12-02 14:24:19,089 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:19" (1/1) ... [2024-12-02 14:24:19,092 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 14:24:19,093 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 14:24:19,093 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 14:24:19,093 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 14:24:19,094 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:19" (1/1) ... [2024-12-02 14:24:19,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 14:24:19,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90565031-70bc-4df0-9724-917c24b007be/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:24:19,123 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90565031-70bc-4df0-9724-917c24b007be/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 14:24:19,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90565031-70bc-4df0-9724-917c24b007be/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 14:24:19,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 14:24:19,151 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-12-02 14:24:19,151 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-12-02 14:24:19,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 14:24:19,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 14:24:19,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 14:24:19,213 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 14:24:19,215 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 14:24:19,416 INFO L? ?]: Removed 18 outVars from TransFormulas that were not future-live. [2024-12-02 14:24:19,416 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 14:24:19,425 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 14:24:19,426 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-12-02 14:24:19,426 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:24:19 BoogieIcfgContainer [2024-12-02 14:24:19,426 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 14:24:19,428 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 14:24:19,428 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 14:24:19,432 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 14:24:19,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:24:18" (1/3) ... [2024-12-02 14:24:19,432 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72388b2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:24:19, skipping insertion in model container [2024-12-02 14:24:19,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:24:19" (2/3) ... [2024-12-02 14:24:19,433 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72388b2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:24:19, skipping insertion in model container [2024-12-02 14:24:19,433 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:24:19" (3/3) ... [2024-12-02 14:24:19,434 INFO L128 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_25-while_file-4.i [2024-12-02 14:24:19,445 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 14:24:19,446 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG hardness_loopvsstraightlinecode_25-while_file-4.i that has 2 procedures, 49 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-12-02 14:24:19,487 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 14:24:19,497 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;@27ed1e38, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 14:24:19,497 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-12-02 14:24:19,500 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 32 states have internal predecessors, (42), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-12-02 14:24:19,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-12-02 14:24:19,506 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:19,507 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:19,507 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:24:19,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:19,511 INFO L85 PathProgramCache]: Analyzing trace with hash -2054426347, now seen corresponding path program 1 times [2024-12-02 14:24:19,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:19,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310411696] [2024-12-02 14:24:19,517 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:19,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:19,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:19,703 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-12-02 14:24:19,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:24:19,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310411696] [2024-12-02 14:24:19,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310411696] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 14:24:19,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877625906] [2024-12-02 14:24:19,704 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:19,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 14:24:19,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90565031-70bc-4df0-9724-917c24b007be/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 14:24:19,707 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90565031-70bc-4df0-9724-917c24b007be/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 14:24:19,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90565031-70bc-4df0-9724-917c24b007be/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 14:24:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:24:19,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-12-02 14:24:19,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 14:24:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-12-02 14:24:19,851 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 14:24:19,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877625906] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:24:19,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 14:24:19,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-12-02 14:24:19,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256455148] [2024-12-02 14:24:19,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:24:19,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-12-02 14:24:19,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:24:19,871 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-12-02 14:24:19,871 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-12-02 14:24:19,873 INFO L87 Difference]: Start difference. First operand has 49 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 32 states have internal predecessors, (42), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2024-12-02 14:24:19,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:24:19,891 INFO L93 Difference]: Finished difference Result 91 states and 153 transitions. [2024-12-02 14:24:19,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-12-02 14:24:19,893 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) Word has length 96 [2024-12-02 14:24:19,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:24:19,898 INFO L225 Difference]: With dead ends: 91 [2024-12-02 14:24:19,899 INFO L226 Difference]: Without dead ends: 45 [2024-12-02 14:24:19,901 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-12-02 14:24:19,904 INFO L435 NwaCegarLoop]: 65 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, 65 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 [2024-12-02 14:24:19,904 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 14:24:19,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-12-02 14:24:19,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-12-02 14:24:19,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-12-02 14:24:19,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 65 transitions. [2024-12-02 14:24:19,934 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 65 transitions. Word has length 96 [2024-12-02 14:24:19,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:24:19,934 INFO L471 AbstractCegarLoop]: Abstraction has 45 states and 65 transitions. [2024-12-02 14:24:19,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 2 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 2 states have call successors, (15) [2024-12-02 14:24:19,935 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 65 transitions. [2024-12-02 14:24:19,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-12-02 14:24:19,938 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:24:19,938 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:24:19,945 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90565031-70bc-4df0-9724-917c24b007be/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 14:24:20,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90565031-70bc-4df0-9724-917c24b007be/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-12-02 14:24:20,139 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:24:20,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:24:20,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1464083543, now seen corresponding path program 1 times [2024-12-02 14:24:20,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:24:20,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690277864] [2024-12-02 14:24:20,140 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:24:20,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:24:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:29:59,017 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-12-02 14:29:59,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:29:59,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690277864] [2024-12-02 14:29:59,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690277864] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:29:59,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:29:59,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-12-02 14:29:59,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150904211] [2024-12-02 14:29:59,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:29:59,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 14:29:59,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:29:59,019 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 14:29:59,019 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-12-02 14:29:59,019 INFO L87 Difference]: Start difference. First operand 45 states and 65 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-12-02 14:30:01,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:30:01,347 INFO L93 Difference]: Finished difference Result 81 states and 106 transitions. [2024-12-02 14:30:01,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 14:30:01,348 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 96 [2024-12-02 14:30:01,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:30:01,350 INFO L225 Difference]: With dead ends: 81 [2024-12-02 14:30:01,350 INFO L226 Difference]: Without dead ends: 79 [2024-12-02 14:30:01,350 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-12-02 14:30:01,351 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 57 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 14:30:01,351 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 294 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 14:30:01,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-12-02 14:30:01,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 52. [2024-12-02 14:30:01,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 35 states have internal predecessors, (44), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-12-02 14:30:01,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 74 transitions. [2024-12-02 14:30:01,360 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 74 transitions. Word has length 96 [2024-12-02 14:30:01,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:30:01,362 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 74 transitions. [2024-12-02 14:30:01,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-12-02 14:30:01,362 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 74 transitions. [2024-12-02 14:30:01,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-12-02 14:30:01,363 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:30:01,364 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:30:01,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 14:30:01,364 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:30:01,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:30:01,365 INFO L85 PathProgramCache]: Analyzing trace with hash -2093610722, now seen corresponding path program 1 times [2024-12-02 14:30:01,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:30:01,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463043861] [2024-12-02 14:30:01,365 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:30:01,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:30:01,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:30:05,808 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-12-02 14:30:05,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:30:05,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463043861] [2024-12-02 14:30:05,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463043861] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:30:05,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:30:05,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-12-02 14:30:05,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604862276] [2024-12-02 14:30:05,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:30:05,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 14:30:05,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:30:05,810 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 14:30:05,810 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-12-02 14:30:05,810 INFO L87 Difference]: Start difference. First operand 52 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-12-02 14:30:06,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:30:06,896 INFO L93 Difference]: Finished difference Result 83 states and 111 transitions. [2024-12-02 14:30:06,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 14:30:06,897 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 97 [2024-12-02 14:30:06,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:30:06,897 INFO L225 Difference]: With dead ends: 83 [2024-12-02 14:30:06,898 INFO L226 Difference]: Without dead ends: 81 [2024-12-02 14:30:06,898 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2024-12-02 14:30:06,898 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 66 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-12-02 14:30:06,898 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 303 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-12-02 14:30:06,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-12-02 14:30:06,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 57. [2024-12-02 14:30:06,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 40 states have (on average 1.3) internal successors, (52), 40 states have internal predecessors, (52), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-12-02 14:30:06,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2024-12-02 14:30:06,905 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 97 [2024-12-02 14:30:06,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:30:06,905 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2024-12-02 14:30:06,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-12-02 14:30:06,905 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2024-12-02 14:30:06,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-12-02 14:30:06,907 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:30:06,907 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:30:06,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-12-02 14:30:06,907 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:30:06,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:30:06,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2091763680, now seen corresponding path program 1 times [2024-12-02 14:30:06,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:30:06,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128643115] [2024-12-02 14:30:06,908 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:30:06,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:30:06,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:30:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-12-02 14:30:08,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:30:08,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128643115] [2024-12-02 14:30:08,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128643115] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:30:08,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:30:08,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-12-02 14:30:08,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871070792] [2024-12-02 14:30:08,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:30:08,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 14:30:08,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:30:08,773 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 14:30:08,773 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-12-02 14:30:08,773 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-12-02 14:30:09,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:30:09,560 INFO L93 Difference]: Finished difference Result 83 states and 111 transitions. [2024-12-02 14:30:09,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 14:30:09,560 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 97 [2024-12-02 14:30:09,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:30:09,562 INFO L225 Difference]: With dead ends: 83 [2024-12-02 14:30:09,562 INFO L226 Difference]: Without dead ends: 81 [2024-12-02 14:30:09,562 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-12-02 14:30:09,563 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 39 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 14:30:09,563 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 311 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 14:30:09,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-12-02 14:30:09,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 57. [2024-12-02 14:30:09,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 40 states have (on average 1.3) internal successors, (52), 40 states have internal predecessors, (52), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-12-02 14:30:09,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 82 transitions. [2024-12-02 14:30:09,570 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 82 transitions. Word has length 97 [2024-12-02 14:30:09,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:30:09,570 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 82 transitions. [2024-12-02 14:30:09,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-12-02 14:30:09,571 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 82 transitions. [2024-12-02 14:30:09,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-12-02 14:30:09,572 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:30:09,572 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:30:09,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-12-02 14:30:09,572 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:30:09,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:30:09,573 INFO L85 PathProgramCache]: Analyzing trace with hash 2055692672, now seen corresponding path program 1 times [2024-12-02 14:30:09,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:30:09,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926694826] [2024-12-02 14:30:09,573 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:30:09,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:30:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:30:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-12-02 14:30:10,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:30:10,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926694826] [2024-12-02 14:30:10,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926694826] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:30:10,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:30:10,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-12-02 14:30:10,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573131626] [2024-12-02 14:30:10,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:30:10,336 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 14:30:10,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:30:10,336 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 14:30:10,337 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-12-02 14:30:10,337 INFO L87 Difference]: Start difference. First operand 57 states and 82 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-12-02 14:30:10,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:30:10,653 INFO L93 Difference]: Finished difference Result 133 states and 189 transitions. [2024-12-02 14:30:10,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 14:30:10,654 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 97 [2024-12-02 14:30:10,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:30:10,655 INFO L225 Difference]: With dead ends: 133 [2024-12-02 14:30:10,655 INFO L226 Difference]: Without dead ends: 79 [2024-12-02 14:30:10,656 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-12-02 14:30:10,656 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 19 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 14:30:10,656 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 380 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 14:30:10,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-12-02 14:30:10,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2024-12-02 14:30:10,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-12-02 14:30:10,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 86 transitions. [2024-12-02 14:30:10,660 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 86 transitions. Word has length 97 [2024-12-02 14:30:10,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:30:10,661 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 86 transitions. [2024-12-02 14:30:10,661 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-12-02 14:30:10,661 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 86 transitions. [2024-12-02 14:30:10,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-12-02 14:30:10,661 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:30:10,662 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:30:10,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-12-02 14:30:10,662 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:30:10,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:30:10,662 INFO L85 PathProgramCache]: Analyzing trace with hash -464267262, now seen corresponding path program 1 times [2024-12-02 14:30:10,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:30:10,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396591733] [2024-12-02 14:30:10,663 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:30:10,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:30:10,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:30:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-12-02 14:30:11,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:30:11,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396591733] [2024-12-02 14:30:11,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396591733] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:30:11,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:30:11,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-12-02 14:30:11,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923439564] [2024-12-02 14:30:11,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:30:11,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 14:30:11,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:30:11,471 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 14:30:11,471 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-12-02 14:30:11,471 INFO L87 Difference]: Start difference. First operand 60 states and 86 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-12-02 14:30:11,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:30:11,738 INFO L93 Difference]: Finished difference Result 130 states and 185 transitions. [2024-12-02 14:30:11,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 14:30:11,738 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 97 [2024-12-02 14:30:11,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:30:11,740 INFO L225 Difference]: With dead ends: 130 [2024-12-02 14:30:11,740 INFO L226 Difference]: Without dead ends: 73 [2024-12-02 14:30:11,740 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-12-02 14:30:11,741 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 17 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 14:30:11,741 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 352 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 14:30:11,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-12-02 14:30:11,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 60. [2024-12-02 14:30:11,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-12-02 14:30:11,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 86 transitions. [2024-12-02 14:30:11,747 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 86 transitions. Word has length 97 [2024-12-02 14:30:11,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:30:11,747 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 86 transitions. [2024-12-02 14:30:11,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-12-02 14:30:11,748 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 86 transitions. [2024-12-02 14:30:11,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-12-02 14:30:11,749 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:30:11,749 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:30:11,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-12-02 14:30:11,749 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:30:11,749 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:30:11,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1166555423, now seen corresponding path program 1 times [2024-12-02 14:30:11,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:30:11,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482887503] [2024-12-02 14:30:11,750 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:30:11,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:30:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 14:37:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-12-02 14:37:00,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 14:37:00,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482887503] [2024-12-02 14:37:00,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482887503] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 14:37:00,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 14:37:00,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-12-02 14:37:00,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249323315] [2024-12-02 14:37:00,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 14:37:00,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 14:37:00,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 14:37:00,203 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 14:37:00,204 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-12-02 14:37:00,204 INFO L87 Difference]: Start difference. First operand 60 states and 86 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-12-02 14:37:04,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 14:37:04,825 INFO L93 Difference]: Finished difference Result 101 states and 131 transitions. [2024-12-02 14:37:04,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 14:37:04,825 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 97 [2024-12-02 14:37:04,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 14:37:04,826 INFO L225 Difference]: With dead ends: 101 [2024-12-02 14:37:04,826 INFO L226 Difference]: Without dead ends: 99 [2024-12-02 14:37:04,826 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-12-02 14:37:04,827 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 40 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 14:37:04,827 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 417 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 14:37:04,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-12-02 14:37:04,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 58. [2024-12-02 14:37:04,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 41 states have internal predecessors, (53), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-12-02 14:37:04,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 83 transitions. [2024-12-02 14:37:04,833 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 83 transitions. Word has length 97 [2024-12-02 14:37:04,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 14:37:04,834 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 83 transitions. [2024-12-02 14:37:04,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2024-12-02 14:37:04,834 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 83 transitions. [2024-12-02 14:37:04,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-12-02 14:37:04,835 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 14:37:04,835 INFO L218 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 14:37:04,835 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-12-02 14:37:04,836 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 14:37:04,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 14:37:04,836 INFO L85 PathProgramCache]: Analyzing trace with hash -486497053, now seen corresponding path program 1 times [2024-12-02 14:37:04,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 14:37:04,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067913423] [2024-12-02 14:37:04,836 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 14:37:04,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 14:37:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat