./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/string-2.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_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/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_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/string-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/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_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/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 fd601fa28543c13c2fbec075867019b65bb9d0c4bbf720a0162dbf887aa47892 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-28 04:56:19,795 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:56:19,889 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-28 04:56:19,898 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:56:19,899 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:56:19,930 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:56:19,930 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:56:19,930 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:56:19,931 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:56:19,931 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:56:19,931 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:56:19,931 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:56:19,931 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:56:19,931 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:56:19,932 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:56:19,932 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:56:19,932 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-28 04:56:19,932 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:56:19,932 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:56:19,932 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:56:19,932 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:56:19,932 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-28 04:56:19,933 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:56:19,933 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-28 04:56:19,933 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:56:19,933 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-28 04:56:19,933 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:56:19,933 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:56:19,933 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:56:19,933 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:56:19,933 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:56:19,934 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:56:19,934 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:56:19,934 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:56:19,934 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:56:19,934 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:56:19,934 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:56:19,934 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:56:19,934 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:56:19,934 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:56:19,934 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-28 04:56:19,935 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-28 04:56:19,935 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:56:19,935 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:56:19,935 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:56:19,935 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:56:19,935 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:56:19,935 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:56:19,935 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_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/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 -> fd601fa28543c13c2fbec075867019b65bb9d0c4bbf720a0162dbf887aa47892 [2024-11-28 04:56:20,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:56:20,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:56:20,246 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:56:20,248 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:56:20,248 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:56:20,249 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/loops/string-2.i [2024-11-28 04:56:23,239 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/data/deb8625c8/6920f21577614b7e80d50f4f84405ed3/FLAG2624c99c0 [2024-11-28 04:56:23,551 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:56:23,552 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/sv-benchmarks/c/loops/string-2.i [2024-11-28 04:56:23,559 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/data/deb8625c8/6920f21577614b7e80d50f4f84405ed3/FLAG2624c99c0 [2024-11-28 04:56:23,574 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/data/deb8625c8/6920f21577614b7e80d50f4f84405ed3 [2024-11-28 04:56:23,577 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:56:23,578 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:56:23,580 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:56:23,580 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:56:23,584 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:56:23,585 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:56:23" (1/1) ... [2024-11-28 04:56:23,586 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@692d0520 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:23, skipping insertion in model container [2024-11-28 04:56:23,586 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:56:23" (1/1) ... [2024-11-28 04:56:23,604 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:56:23,772 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_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/sv-benchmarks/c/loops/string-2.i[896,909] [2024-11-28 04:56:23,795 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:56:23,803 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:56:23,817 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_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/sv-benchmarks/c/loops/string-2.i[896,909] [2024-11-28 04:56:23,839 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:56:23,864 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:56:23,865 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:23 WrapperNode [2024-11-28 04:56:23,865 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:56:23,867 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:56:23,867 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:56:23,867 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:56:23,875 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:23" (1/1) ... [2024-11-28 04:56:23,886 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:23" (1/1) ... [2024-11-28 04:56:23,909 INFO L138 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 124 [2024-11-28 04:56:23,909 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:56:23,910 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:56:23,910 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:56:23,910 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:56:23,920 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:23" (1/1) ... [2024-11-28 04:56:23,920 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:23" (1/1) ... [2024-11-28 04:56:23,922 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:23" (1/1) ... [2024-11-28 04:56:23,938 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 4, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-11-28 04:56:23,938 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:23" (1/1) ... [2024-11-28 04:56:23,939 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:23" (1/1) ... [2024-11-28 04:56:23,946 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:23" (1/1) ... [2024-11-28 04:56:23,947 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:23" (1/1) ... [2024-11-28 04:56:23,952 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:23" (1/1) ... [2024-11-28 04:56:23,953 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:23" (1/1) ... [2024-11-28 04:56:23,954 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:23" (1/1) ... [2024-11-28 04:56:23,956 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:56:23,957 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:56:23,957 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:56:23,957 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:56:23,958 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:23" (1/1) ... [2024-11-28 04:56:23,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:56:23,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:56:23,994 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:56:24,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:56:24,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:56:24,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:56:24,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 04:56:24,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-28 04:56:24,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 04:56:24,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 04:56:24,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 04:56:24,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-28 04:56:24,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:56:24,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:56:24,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 04:56:24,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 04:56:24,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-28 04:56:24,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 04:56:24,155 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:56:24,160 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:56:24,409 INFO L? ?]: Removed 22 outVars from TransFormulas that were not future-live. [2024-11-28 04:56:24,409 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:56:24,420 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:56:24,421 INFO L312 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-28 04:56:24,421 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:56:24 BoogieIcfgContainer [2024-11-28 04:56:24,421 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:56:24,424 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:56:24,424 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:56:24,430 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:56:24,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:56:23" (1/3) ... [2024-11-28 04:56:24,431 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50128568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:56:24, skipping insertion in model container [2024-11-28 04:56:24,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:23" (2/3) ... [2024-11-28 04:56:24,432 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50128568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:56:24, skipping insertion in model container [2024-11-28 04:56:24,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:56:24" (3/3) ... [2024-11-28 04:56:24,433 INFO L128 eAbstractionObserver]: Analyzing ICFG string-2.i [2024-11-28 04:56:24,453 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:56:24,455 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG string-2.i that has 1 procedures, 31 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2024-11-28 04:56:24,529 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:56:24,547 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;@4c407341, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:56:24,547 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 04:56:24,552 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:24,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-28 04:56:24,558 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:56:24,558 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:24,559 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:56:24,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:24,564 INFO L85 PathProgramCache]: Analyzing trace with hash -785186089, now seen corresponding path program 1 times [2024-11-28 04:56:24,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:56:24,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426971404] [2024-11-28 04:56:24,572 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:24,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:56:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:24,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:56:24,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:56:24,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426971404] [2024-11-28 04:56:24,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426971404] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:56:24,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:56:24,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:56:24,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913207926] [2024-11-28 04:56:24,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:56:24,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:56:24,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:56:24,942 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:56:24,943 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:56:24,945 INFO L87 Difference]: Start difference. First operand has 31 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:25,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:56:25,052 INFO L93 Difference]: Finished difference Result 66 states and 102 transitions. [2024-11-28 04:56:25,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:56:25,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-28 04:56:25,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:56:25,068 INFO L225 Difference]: With dead ends: 66 [2024-11-28 04:56:25,068 INFO L226 Difference]: Without dead ends: 35 [2024-11-28 04:56:25,072 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:56:25,077 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:56:25,079 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 53 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:56:25,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-28 04:56:25,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2024-11-28 04:56:25,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:25,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2024-11-28 04:56:25,124 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 17 [2024-11-28 04:56:25,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:56:25,126 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2024-11-28 04:56:25,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:25,127 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2024-11-28 04:56:25,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-11-28 04:56:25,128 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:56:25,129 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:25,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 04:56:25,130 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:56:25,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:25,131 INFO L85 PathProgramCache]: Analyzing trace with hash 744254992, now seen corresponding path program 1 times [2024-11-28 04:56:25,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:56:25,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188707844] [2024-11-28 04:56:25,132 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:25,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:56:25,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:25,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:56:25,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:56:25,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188707844] [2024-11-28 04:56:25,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188707844] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:56:25,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720665674] [2024-11-28 04:56:25,323 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:25,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:25,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:56:25,326 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:56:25,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:56:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:25,411 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 04:56:25,415 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:56:25,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:56:25,456 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:56:25,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:56:25,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720665674] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:56:25,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:56:25,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-28 04:56:25,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547756684] [2024-11-28 04:56:25,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:56:25,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-28 04:56:25,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:56:25,493 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-28 04:56:25,493 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:56:25,493 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:25,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:56:25,638 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2024-11-28 04:56:25,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:56:25,639 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2024-11-28 04:56:25,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:56:25,640 INFO L225 Difference]: With dead ends: 83 [2024-11-28 04:56:25,644 INFO L226 Difference]: Without dead ends: 57 [2024-11-28 04:56:25,645 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:56:25,645 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:56:25,646 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 56 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:56:25,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-28 04:56:25,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 43. [2024-11-28 04:56:25,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:25,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2024-11-28 04:56:25,652 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 23 [2024-11-28 04:56:25,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:56:25,653 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2024-11-28 04:56:25,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:25,653 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2024-11-28 04:56:25,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-28 04:56:25,654 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:56:25,654 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:25,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 04:56:25,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:25,855 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:56:25,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:25,856 INFO L85 PathProgramCache]: Analyzing trace with hash -478906896, now seen corresponding path program 2 times [2024-11-28 04:56:25,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:56:25,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149664966] [2024-11-28 04:56:25,856 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:56:25,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:56:25,900 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 04:56:25,900 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:56:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-28 04:56:26,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:56:26,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149664966] [2024-11-28 04:56:26,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149664966] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:56:26,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:56:26,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:56:26,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795440304] [2024-11-28 04:56:26,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:56:26,079 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:56:26,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:56:26,080 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:56:26,080 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:56:26,080 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:26,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:56:26,097 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2024-11-28 04:56:26,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:56:26,098 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-28 04:56:26,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:56:26,099 INFO L225 Difference]: With dead ends: 47 [2024-11-28 04:56:26,099 INFO L226 Difference]: Without dead ends: 42 [2024-11-28 04:56:26,099 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:56:26,100 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:56:26,101 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:56:26,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-28 04:56:26,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-11-28 04:56:26,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:26,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2024-11-28 04:56:26,111 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 35 [2024-11-28 04:56:26,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:56:26,111 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2024-11-28 04:56:26,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:26,112 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2024-11-28 04:56:26,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-28 04:56:26,112 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:56:26,112 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:26,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-28 04:56:26,113 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:56:26,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:26,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1978464030, now seen corresponding path program 1 times [2024-11-28 04:56:26,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:56:26,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515992555] [2024-11-28 04:56:26,114 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:26,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:56:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-28 04:56:26,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:56:26,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515992555] [2024-11-28 04:56:26,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515992555] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:56:26,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:56:26,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:56:26,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400462103] [2024-11-28 04:56:26,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:56:26,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:56:26,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:56:26,344 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:56:26,344 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:56:26,345 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:26,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:56:26,426 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2024-11-28 04:56:26,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:56:26,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-28 04:56:26,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:56:26,427 INFO L225 Difference]: With dead ends: 60 [2024-11-28 04:56:26,427 INFO L226 Difference]: Without dead ends: 45 [2024-11-28 04:56:26,428 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:56:26,428 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:56:26,429 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 68 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:56:26,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-28 04:56:26,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2024-11-28 04:56:26,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:26,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2024-11-28 04:56:26,439 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 39 [2024-11-28 04:56:26,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:56:26,439 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2024-11-28 04:56:26,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:26,439 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2024-11-28 04:56:26,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-28 04:56:26,440 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:56:26,440 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:26,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-28 04:56:26,440 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:56:26,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:26,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1440158726, now seen corresponding path program 1 times [2024-11-28 04:56:26,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:56:26,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410159561] [2024-11-28 04:56:26,441 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:26,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:56:26,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:26,651 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 04:56:26,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:56:26,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410159561] [2024-11-28 04:56:26,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410159561] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:56:26,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565873602] [2024-11-28 04:56:26,652 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:26,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:26,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:56:26,656 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:56:26,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:56:26,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:26,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 04:56:26,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:56:26,821 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 04:56:26,822 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:56:26,903 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-28 04:56:26,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565873602] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:56:26,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 04:56:26,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2024-11-28 04:56:26,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120902318] [2024-11-28 04:56:26,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 04:56:26,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-28 04:56:26,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:56:26,905 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-28 04:56:26,905 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:56:26,905 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:27,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:56:27,059 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2024-11-28 04:56:27,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-28 04:56:27,060 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2024-11-28 04:56:27,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:56:27,060 INFO L225 Difference]: With dead ends: 99 [2024-11-28 04:56:27,061 INFO L226 Difference]: Without dead ends: 66 [2024-11-28 04:56:27,061 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 78 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-11-28 04:56:27,062 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:56:27,062 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 56 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:56:27,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-11-28 04:56:27,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2024-11-28 04:56:27,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:27,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2024-11-28 04:56:27,081 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 42 [2024-11-28 04:56:27,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:56:27,082 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2024-11-28 04:56:27,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:27,082 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2024-11-28 04:56:27,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-28 04:56:27,083 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:56:27,084 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:27,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 04:56:27,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:27,284 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:56:27,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:27,285 INFO L85 PathProgramCache]: Analyzing trace with hash 938705242, now seen corresponding path program 2 times [2024-11-28 04:56:27,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:56:27,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345809365] [2024-11-28 04:56:27,285 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:56:27,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:56:27,358 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:56:27,358 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:56:27,567 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-28 04:56:27,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 04:56:27,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345809365] [2024-11-28 04:56:27,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345809365] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 04:56:27,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165346346] [2024-11-28 04:56:27,568 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:56:27,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:27,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:56:27,571 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:56:27,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:56:27,699 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:56:27,699 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:56:27,701 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-28 04:56:27,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:56:27,757 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-28 04:56:27,757 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:56:27,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165346346] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:56:27,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:56:27,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-11-28 04:56:27,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572414212] [2024-11-28 04:56:27,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:56:27,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:56:27,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 04:56:27,759 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:56:27,759 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:56:27,760 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:27,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:56:27,796 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2024-11-28 04:56:27,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:56:27,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-11-28 04:56:27,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:56:27,798 INFO L225 Difference]: With dead ends: 63 [2024-11-28 04:56:27,798 INFO L226 Difference]: Without dead ends: 52 [2024-11-28 04:56:27,798 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:56:27,801 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 23 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:56:27,802 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 50 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:56:27,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-28 04:56:27,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2024-11-28 04:56:27,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:27,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2024-11-28 04:56:27,814 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 46 [2024-11-28 04:56:27,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:56:27,815 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2024-11-28 04:56:27,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:27,815 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2024-11-28 04:56:27,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-28 04:56:27,816 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:56:27,816 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:27,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 04:56:28,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-28 04:56:28,017 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:56:28,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:28,018 INFO L85 PathProgramCache]: Analyzing trace with hash -996910551, now seen corresponding path program 1 times [2024-11-28 04:56:28,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 04:56:28,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296426603] [2024-11-28 04:56:28,018 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:28,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 04:56:28,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 04:56:28,094 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-28 04:56:28,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 04:56:28,204 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-28 04:56:28,205 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-28 04:56:28,206 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-28 04:56:28,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-28 04:56:28,211 INFO L422 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2024-11-28 04:56:28,277 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-28 04:56:28,283 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 04:56:28 BoogieIcfgContainer [2024-11-28 04:56:28,284 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-28 04:56:28,284 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-28 04:56:28,284 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-28 04:56:28,285 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-28 04:56:28,285 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:56:24" (3/4) ... [2024-11-28 04:56:28,288 INFO L149 WitnessPrinter]: No result that supports witness generation found [2024-11-28 04:56:28,289 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-28 04:56:28,290 INFO L158 Benchmark]: Toolchain (without parser) took 4712.16ms. Allocated memory is still 117.4MB. Free memory was 92.8MB in the beginning and 51.3MB in the end (delta: 41.5MB). Peak memory consumption was 39.4MB. Max. memory is 16.1GB. [2024-11-28 04:56:28,292 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 117.4MB. Free memory is still 73.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:56:28,293 INFO L158 Benchmark]: CACSL2BoogieTranslator took 286.36ms. Allocated memory is still 117.4MB. Free memory was 92.8MB in the beginning and 81.3MB in the end (delta: 11.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 04:56:28,294 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.51ms. Allocated memory is still 117.4MB. Free memory was 81.0MB in the beginning and 79.8MB in the end (delta: 1.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 04:56:28,294 INFO L158 Benchmark]: Boogie Preprocessor took 46.56ms. Allocated memory is still 117.4MB. Free memory was 79.8MB in the beginning and 78.2MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:56:28,295 INFO L158 Benchmark]: RCFGBuilder took 464.41ms. Allocated memory is still 117.4MB. Free memory was 78.0MB in the beginning and 65.1MB in the end (delta: 12.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 04:56:28,295 INFO L158 Benchmark]: TraceAbstraction took 3859.75ms. Allocated memory is still 117.4MB. Free memory was 64.3MB in the beginning and 51.3MB in the end (delta: 12.9MB). Peak memory consumption was 14.2MB. Max. memory is 16.1GB. [2024-11-28 04:56:28,295 INFO L158 Benchmark]: Witness Printer took 5.13ms. Allocated memory is still 117.4MB. Free memory was 51.3MB in the beginning and 51.3MB in the end (delta: 21.1kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:56:28,299 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 117.4MB. Free memory is still 73.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 286.36ms. Allocated memory is still 117.4MB. Free memory was 92.8MB in the beginning and 81.3MB in the end (delta: 11.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.51ms. Allocated memory is still 117.4MB. Free memory was 81.0MB in the beginning and 79.8MB in the end (delta: 1.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 46.56ms. Allocated memory is still 117.4MB. Free memory was 79.8MB in the beginning and 78.2MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 464.41ms. Allocated memory is still 117.4MB. Free memory was 78.0MB in the beginning and 65.1MB in the end (delta: 12.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 3859.75ms. Allocated memory is still 117.4MB. Free memory was 64.3MB in the beginning and 51.3MB in the end (delta: 12.9MB). Peak memory consumption was 14.2MB. Max. memory is 16.1GB. * Witness Printer took 5.13ms. Allocated memory is still 117.4MB. Free memory was 51.3MB in the beginning and 51.3MB in the end (delta: 21.1kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 69. Possible FailurePath: [L31] char string_A[5], string_B[5]; [L32] int i, j, nc_A, nc_B, found=0; [L35] i=0 VAL [i=0, string_A={6:0}, string_B={7:0}] [L35] COND TRUE i<5 VAL [i=0, string_A={6:0}, string_B={7:0}] [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [i=1, string_A={6:0}, string_B={7:0}] [L35] COND TRUE i<5 VAL [i=1, string_A={6:0}, string_B={7:0}] [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [i=2, string_A={6:0}, string_B={7:0}] [L35] COND TRUE i<5 VAL [i=2, string_A={6:0}, string_B={7:0}] [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [i=3, string_A={6:0}, string_B={7:0}] [L35] COND TRUE i<5 VAL [i=3, string_A={6:0}, string_B={7:0}] [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [i=4, string_A={6:0}, string_B={7:0}] [L35] COND TRUE i<5 VAL [i=4, string_A={6:0}, string_B={7:0}] [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [i=5, string_A={6:0}, string_B={7:0}] [L35] COND FALSE !(i<5) VAL [string_A={6:0}, string_B={7:0}] [L37] EXPR string_A[5 -1] [L37] COND FALSE !(!(string_A[5 -1]=='\0')) [L39] i=0 VAL [i=0, string_A={6:0}, string_B={7:0}] [L39] COND TRUE i<5 VAL [i=0, string_A={6:0}, string_B={7:0}] [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [i=1, string_A={6:0}, string_B={7:0}] [L39] COND TRUE i<5 VAL [i=1, string_A={6:0}, string_B={7:0}] [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [i=2, string_A={6:0}, string_B={7:0}] [L39] COND TRUE i<5 VAL [i=2, string_A={6:0}, string_B={7:0}] [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [i=3, string_A={6:0}, string_B={7:0}] [L39] COND TRUE i<5 VAL [i=3, string_A={6:0}, string_B={7:0}] [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [i=4, string_A={6:0}, string_B={7:0}] [L39] COND TRUE i<5 VAL [i=4, string_A={6:0}, string_B={7:0}] [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [i=5, string_A={6:0}, string_B={7:0}] [L39] COND FALSE !(i<5) VAL [string_A={6:0}, string_B={7:0}] [L41] EXPR string_B[5 -1] [L41] COND FALSE !(!(string_B[5 -1]=='\0')) [L43] nc_A = 0 VAL [nc_A=0, string_A={6:0}, string_B={7:0}] [L44] EXPR string_A[nc_A] [L44] COND TRUE string_A[nc_A]!='\0' [L45] nc_A++ VAL [nc_A=1, string_A={6:0}, string_B={7:0}] [L44] EXPR string_A[nc_A] [L44] COND FALSE !(string_A[nc_A]!='\0') [L47] nc_B = 0 VAL [nc_A=1, nc_B=0, string_A={6:0}, string_B={7:0}] [L48] EXPR string_B[nc_B] [L48] COND TRUE string_B[nc_B]!='\0' [L49] nc_B++ VAL [nc_A=1, nc_B=1, string_A={6:0}, string_B={7:0}] [L48] EXPR string_B[nc_B] [L48] COND FALSE !(string_B[nc_B]!='\0') [L51] COND FALSE !(!(nc_B >= nc_A)) [L54] EXPR j=0 [L54] i=j=0 VAL [i=0, j=0, nc_A=1, nc_B=1, string_A={6:0}, string_B={7:0}] [L55] COND TRUE (inc_B-1)<nc_B-1)< main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/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 -> fd601fa28543c13c2fbec075867019b65bb9d0c4bbf720a0162dbf887aa47892 [2024-11-28 04:56:31,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:56:31,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:56:31,753 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:56:31,754 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:56:31,754 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:56:31,756 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/loops/string-2.i [2024-11-28 04:56:34,753 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/data/f0aac36a5/81516d9b81d048c2be6aa918817784d4/FLAGcb56aab04 [2024-11-28 04:56:35,083 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:56:35,086 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/sv-benchmarks/c/loops/string-2.i [2024-11-28 04:56:35,096 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/data/f0aac36a5/81516d9b81d048c2be6aa918817784d4/FLAGcb56aab04 [2024-11-28 04:56:35,119 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/data/f0aac36a5/81516d9b81d048c2be6aa918817784d4 [2024-11-28 04:56:35,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:56:35,123 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:56:35,125 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:56:35,125 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:56:35,131 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:56:35,132 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:56:35" (1/1) ... [2024-11-28 04:56:35,134 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13d6df33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:35, skipping insertion in model container [2024-11-28 04:56:35,134 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:56:35" (1/1) ... [2024-11-28 04:56:35,151 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:56:35,341 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_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/sv-benchmarks/c/loops/string-2.i[896,909] [2024-11-28 04:56:35,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:56:35,393 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:56:35,407 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_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/sv-benchmarks/c/loops/string-2.i[896,909] [2024-11-28 04:56:35,434 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:56:35,455 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:56:35,455 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:35 WrapperNode [2024-11-28 04:56:35,456 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:56:35,457 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:56:35,457 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:56:35,457 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:56:35,468 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:35" (1/1) ... [2024-11-28 04:56:35,477 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:35" (1/1) ... [2024-11-28 04:56:35,504 INFO L138 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 116 [2024-11-28 04:56:35,506 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:56:35,507 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:56:35,508 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:56:35,509 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:56:35,520 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:35" (1/1) ... [2024-11-28 04:56:35,520 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:35" (1/1) ... [2024-11-28 04:56:35,525 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:35" (1/1) ... [2024-11-28 04:56:35,541 INFO L175 MemorySlicer]: Split 10 memory accesses to 3 slices as follows [2, 4, 4]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-11-28 04:56:35,542 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:35" (1/1) ... [2024-11-28 04:56:35,542 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:35" (1/1) ... [2024-11-28 04:56:35,550 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:35" (1/1) ... [2024-11-28 04:56:35,555 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:35" (1/1) ... [2024-11-28 04:56:35,561 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:35" (1/1) ... [2024-11-28 04:56:35,566 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:35" (1/1) ... [2024-11-28 04:56:35,567 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:35" (1/1) ... [2024-11-28 04:56:35,569 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:56:35,570 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:56:35,570 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:56:35,571 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:56:35,572 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:35" (1/1) ... [2024-11-28 04:56:35,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:56:35,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:56:35,613 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:56:35,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:56:35,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:56:35,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2024-11-28 04:56:35,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2024-11-28 04:56:35,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#2 [2024-11-28 04:56:35,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-28 04:56:35,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-28 04:56:35,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#2 [2024-11-28 04:56:35,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-28 04:56:35,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:56:35,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:56:35,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#0 [2024-11-28 04:56:35,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#1 [2024-11-28 04:56:35,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1#2 [2024-11-28 04:56:35,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-28 04:56:35,727 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:56:35,729 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 04:56:35,996 INFO L? ?]: Removed 19 outVars from TransFormulas that were not future-live. [2024-11-28 04:56:35,996 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 04:56:36,011 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 04:56:36,011 INFO L312 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-28 04:56:36,012 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:56:36 BoogieIcfgContainer [2024-11-28 04:56:36,012 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 04:56:36,016 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 04:56:36,017 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 04:56:36,023 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 04:56:36,023 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:56:35" (1/3) ... [2024-11-28 04:56:36,024 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23387993 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:56:36, skipping insertion in model container [2024-11-28 04:56:36,025 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:56:35" (2/3) ... [2024-11-28 04:56:36,026 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23387993 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 04:56:36, skipping insertion in model container [2024-11-28 04:56:36,026 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:56:36" (3/3) ... [2024-11-28 04:56:36,028 INFO L128 eAbstractionObserver]: Analyzing ICFG string-2.i [2024-11-28 04:56:36,047 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 04:56:36,050 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG string-2.i that has 1 procedures, 29 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2024-11-28 04:56:36,118 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 04:56:36,136 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;@19001b62, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 04:56:36,137 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-28 04:56:36,142 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:36,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-28 04:56:36,148 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:56:36,149 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:36,151 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:56:36,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:36,157 INFO L85 PathProgramCache]: Analyzing trace with hash 2052879344, now seen corresponding path program 1 times [2024-11-28 04:56:36,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:56:36,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2129819042] [2024-11-28 04:56:36,167 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:36,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:36,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:56:36,170 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:56:36,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 04:56:36,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:36,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-11-28 04:56:36,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:56:36,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:56:36,341 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:56:36,341 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:56:36,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129819042] [2024-11-28 04:56:36,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129819042] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:56:36,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:56:36,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 04:56:36,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185369131] [2024-11-28 04:56:36,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:56:36,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-28 04:56:36,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:56:36,367 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-28 04:56:36,368 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:56:36,370 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:36,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:56:36,384 INFO L93 Difference]: Finished difference Result 54 states and 80 transitions. [2024-11-28 04:56:36,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-28 04:56:36,386 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-28 04:56:36,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:56:36,392 INFO L225 Difference]: With dead ends: 54 [2024-11-28 04:56:36,392 INFO L226 Difference]: Without dead ends: 25 [2024-11-28 04:56:36,395 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-28 04:56:36,398 INFO L435 NwaCegarLoop]: 37 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, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:56:36,399 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:56:36,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-28 04:56:36,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-28 04:56:36,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:36,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2024-11-28 04:56:36,429 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 16 [2024-11-28 04:56:36,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:56:36,429 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2024-11-28 04:56:36,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:36,430 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2024-11-28 04:56:36,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-28 04:56:36,430 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:56:36,431 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:36,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-28 04:56:36,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:36,632 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:56:36,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:36,633 INFO L85 PathProgramCache]: Analyzing trace with hash 185524279, now seen corresponding path program 1 times [2024-11-28 04:56:36,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:56:36,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [404039943] [2024-11-28 04:56:36,634 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:36,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:36,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:56:36,639 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:56:36,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 04:56:36,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:36,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-28 04:56:36,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:56:36,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 04:56:36,812 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:56:36,813 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:56:36,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404039943] [2024-11-28 04:56:36,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404039943] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:56:36,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:56:36,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-28 04:56:36,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806816143] [2024-11-28 04:56:36,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:56:36,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 04:56:36,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:56:36,818 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 04:56:36,819 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:56:36,819 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:36,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:56:36,906 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2024-11-28 04:56:36,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 04:56:36,907 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-28 04:56:36,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:56:36,910 INFO L225 Difference]: With dead ends: 54 [2024-11-28 04:56:36,911 INFO L226 Difference]: Without dead ends: 33 [2024-11-28 04:56:36,912 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 04:56:36,913 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 5 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:56:36,913 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 35 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:56:36,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-11-28 04:56:36,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2024-11-28 04:56:36,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:36,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2024-11-28 04:56:36,927 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 18 [2024-11-28 04:56:36,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:56:36,927 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2024-11-28 04:56:36,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:36,927 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2024-11-28 04:56:36,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-28 04:56:36,928 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:56:36,928 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:36,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-28 04:56:37,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:37,129 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:56:37,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:37,130 INFO L85 PathProgramCache]: Analyzing trace with hash -114541161, now seen corresponding path program 1 times [2024-11-28 04:56:37,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:56:37,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2082120536] [2024-11-28 04:56:37,130 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:37,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:37,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:56:37,136 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:56:37,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 04:56:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:37,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-28 04:56:37,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:56:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:56:37,299 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:56:37,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-28 04:56:37,358 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:56:37,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082120536] [2024-11-28 04:56:37,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082120536] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:56:37,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:56:37,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2024-11-28 04:56:37,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775815868] [2024-11-28 04:56:37,359 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:56:37,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-28 04:56:37,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:56:37,360 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-28 04:56:37,361 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-28 04:56:37,361 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:37,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:56:37,617 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2024-11-28 04:56:37,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 04:56:37,618 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-28 04:56:37,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:56:37,619 INFO L225 Difference]: With dead ends: 77 [2024-11-28 04:56:37,619 INFO L226 Difference]: Without dead ends: 55 [2024-11-28 04:56:37,619 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-11-28 04:56:37,620 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-28 04:56:37,621 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 65 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-28 04:56:37,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-28 04:56:37,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 39. [2024-11-28 04:56:37,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:37,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2024-11-28 04:56:37,628 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 22 [2024-11-28 04:56:37,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:56:37,628 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2024-11-28 04:56:37,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:37,629 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2024-11-28 04:56:37,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-28 04:56:37,630 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:56:37,630 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:37,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-28 04:56:37,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:37,831 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:56:37,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:37,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1123829321, now seen corresponding path program 2 times [2024-11-28 04:56:37,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:56:37,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [580204529] [2024-11-28 04:56:37,832 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:56:37,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:37,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:56:37,836 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:56:37,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-28 04:56:37,937 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-28 04:56:37,937 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 04:56:37,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-28 04:56:37,952 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:56:38,087 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-11-28 04:56:38,087 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:56:38,087 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:56:38,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580204529] [2024-11-28 04:56:38,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580204529] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:56:38,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:56:38,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-28 04:56:38,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52113032] [2024-11-28 04:56:38,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:56:38,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-28 04:56:38,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:56:38,090 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-28 04:56:38,091 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:56:38,091 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:38,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:56:38,182 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2024-11-28 04:56:38,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-28 04:56:38,183 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-28 04:56:38,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:56:38,184 INFO L225 Difference]: With dead ends: 53 [2024-11-28 04:56:38,185 INFO L226 Difference]: Without dead ends: 42 [2024-11-28 04:56:38,185 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-28 04:56:38,186 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:56:38,186 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 73 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:56:38,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-28 04:56:38,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2024-11-28 04:56:38,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:38,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2024-11-28 04:56:38,194 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 34 [2024-11-28 04:56:38,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:56:38,194 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2024-11-28 04:56:38,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:38,195 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2024-11-28 04:56:38,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-28 04:56:38,196 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:56:38,196 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:38,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-28 04:56:38,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:38,397 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:56:38,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:38,397 INFO L85 PathProgramCache]: Analyzing trace with hash 2009821840, now seen corresponding path program 1 times [2024-11-28 04:56:38,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:56:38,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1307155156] [2024-11-28 04:56:38,398 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:38,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:38,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:56:38,400 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:56:38,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-28 04:56:38,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:38,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-28 04:56:38,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:56:38,720 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-28 04:56:38,720 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:56:38,886 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-28 04:56:38,887 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:56:38,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307155156] [2024-11-28 04:56:38,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307155156] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-28 04:56:38,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-28 04:56:38,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2024-11-28 04:56:38,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516857738] [2024-11-28 04:56:38,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:56:38,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:56:38,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:56:38,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:56:38,892 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:56:38,892 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:39,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:56:39,029 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2024-11-28 04:56:39,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:56:39,030 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-11-28 04:56:39,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:56:39,035 INFO L225 Difference]: With dead ends: 46 [2024-11-28 04:56:39,035 INFO L226 Difference]: Without dead ends: 42 [2024-11-28 04:56:39,035 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-28 04:56:39,036 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-28 04:56:39,036 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 51 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-28 04:56:39,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-28 04:56:39,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-11-28 04:56:39,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:39,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2024-11-28 04:56:39,049 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 37 [2024-11-28 04:56:39,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:56:39,049 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2024-11-28 04:56:39,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:39,050 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2024-11-28 04:56:39,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-28 04:56:39,051 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:56:39,051 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:39,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-28 04:56:39,252 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:39,252 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:56:39,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:39,252 INFO L85 PathProgramCache]: Analyzing trace with hash 687382111, now seen corresponding path program 1 times [2024-11-28 04:56:39,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:56:39,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579857208] [2024-11-28 04:56:39,253 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:39,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:39,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:56:39,255 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:56:39,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-28 04:56:39,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:39,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-28 04:56:39,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:56:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-11-28 04:56:39,411 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-28 04:56:39,411 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:56:39,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579857208] [2024-11-28 04:56:39,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579857208] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 04:56:39,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 04:56:39,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-28 04:56:39,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375426399] [2024-11-28 04:56:39,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 04:56:39,412 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 04:56:39,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:56:39,413 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 04:56:39,413 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:56:39,413 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:39,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:56:39,447 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2024-11-28 04:56:39,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-28 04:56:39,448 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2024-11-28 04:56:39,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:56:39,449 INFO L225 Difference]: With dead ends: 60 [2024-11-28 04:56:39,449 INFO L226 Difference]: Without dead ends: 45 [2024-11-28 04:56:39,449 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 04:56:39,450 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-28 04:56:39,451 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 57 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-28 04:56:39,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-11-28 04:56:39,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2024-11-28 04:56:39,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:39,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2024-11-28 04:56:39,459 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 40 [2024-11-28 04:56:39,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:56:39,459 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2024-11-28 04:56:39,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:39,459 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2024-11-28 04:56:39,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-28 04:56:39,460 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:56:39,460 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:39,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-28 04:56:39,661 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:39,661 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:56:39,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:39,662 INFO L85 PathProgramCache]: Analyzing trace with hash 2084259075, now seen corresponding path program 1 times [2024-11-28 04:56:39,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:56:39,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1547111896] [2024-11-28 04:56:39,662 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 04:56:39,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:39,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:56:39,666 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:56:39,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-28 04:56:39,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 04:56:39,777 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 04:56:39,779 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 04:56:39,851 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 04:56:39,851 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 04:56:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-28 04:56:39,992 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-28 04:56:39,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547111896] [2024-11-28 04:56:39,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547111896] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 04:56:39,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-28 04:56:39,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2024-11-28 04:56:39,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817614424] [2024-11-28 04:56:39,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-28 04:56:39,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-28 04:56:39,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-28 04:56:39,994 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-28 04:56:39,994 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:56:39,994 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:40,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-28 04:56:40,606 INFO L93 Difference]: Finished difference Result 101 states and 121 transitions. [2024-11-28 04:56:40,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-28 04:56:40,607 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-11-28 04:56:40,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-28 04:56:40,611 INFO L225 Difference]: With dead ends: 101 [2024-11-28 04:56:40,611 INFO L226 Difference]: Without dead ends: 68 [2024-11-28 04:56:40,611 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-28 04:56:40,612 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-28 04:56:40,612 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 155 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-28 04:56:40,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-28 04:56:40,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2024-11-28 04:56:40,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:40,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2024-11-28 04:56:40,630 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 43 [2024-11-28 04:56:40,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-28 04:56:40,631 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2024-11-28 04:56:40,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-28 04:56:40,631 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2024-11-28 04:56:40,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-28 04:56:40,636 INFO L210 NwaCegarLoop]: Found error trace [2024-11-28 04:56:40,636 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 04:56:40,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-28 04:56:40,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:40,837 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-28 04:56:40,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 04:56:40,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1480369245, now seen corresponding path program 2 times [2024-11-28 04:56:40,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-28 04:56:40,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1972551481] [2024-11-28 04:56:40,838 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 04:56:40,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:40,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:56:40,843 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 04:56:40,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-28 04:56:41,130 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 04:56:41,131 INFO L230 tOrderPrioritization]: Conjunction of SSA is sat [2024-11-28 04:56:41,131 INFO L357 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-28 04:56:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-28 04:56:41,610 INFO L130 FreeRefinementEngine]: Strategy FOX found a feasible trace [2024-11-28 04:56:41,611 INFO L340 BasicCegarLoop]: Counterexample is feasible [2024-11-28 04:56:41,612 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-28 04:56:41,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-28 04:56:41,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 04:56:41,821 INFO L422 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2024-11-28 04:56:41,875 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-28 04:56:41,878 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 04:56:41 BoogieIcfgContainer [2024-11-28 04:56:41,878 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-28 04:56:41,879 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-28 04:56:41,879 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-28 04:56:41,879 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-28 04:56:41,880 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 04:56:36" (3/4) ... [2024-11-28 04:56:41,881 INFO L140 WitnessPrinter]: Generating witness for reachability counterexample [2024-11-28 04:56:41,946 INFO L129 tionWitnessGenerator]: Generated YAML witness of length 25. [2024-11-28 04:56:42,038 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/witness.graphml [2024-11-28 04:56:42,040 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d90b195-ecdc-43ca-a123-e4ed1b02ad3b/bin/uautomizer-verify-aQ6SnzHsRB/witness.yml [2024-11-28 04:56:42,040 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-28 04:56:42,041 INFO L158 Benchmark]: Toolchain (without parser) took 6917.59ms. Allocated memory is still 83.9MB. Free memory was 60.2MB in the beginning and 21.8MB in the end (delta: 38.4MB). Peak memory consumption was 38.4MB. Max. memory is 16.1GB. [2024-11-28 04:56:42,041 INFO L158 Benchmark]: CDTParser took 0.77ms. Allocated memory is still 83.9MB. Free memory is still 63.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:56:42,041 INFO L158 Benchmark]: CACSL2BoogieTranslator took 331.52ms. Allocated memory is still 83.9MB. Free memory was 60.2MB in the beginning and 48.1MB in the end (delta: 12.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 04:56:42,042 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.88ms. Allocated memory is still 83.9MB. Free memory was 48.1MB in the beginning and 46.7MB in the end (delta: 1.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 04:56:42,043 INFO L158 Benchmark]: Boogie Preprocessor took 62.42ms. Allocated memory is still 83.9MB. Free memory was 46.7MB in the beginning and 45.1MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-28 04:56:42,044 INFO L158 Benchmark]: RCFGBuilder took 441.57ms. Allocated memory is still 83.9MB. Free memory was 44.8MB in the beginning and 31.2MB in the end (delta: 13.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 04:56:42,044 INFO L158 Benchmark]: TraceAbstraction took 5861.44ms. Allocated memory is still 83.9MB. Free memory was 30.5MB in the beginning and 28.3MB in the end (delta: 2.3MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. [2024-11-28 04:56:42,045 INFO L158 Benchmark]: Witness Printer took 161.37ms. Allocated memory is still 83.9MB. Free memory was 28.3MB in the beginning and 21.8MB in the end (delta: 6.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-11-28 04:56:42,046 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.77ms. Allocated memory is still 83.9MB. Free memory is still 63.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 331.52ms. Allocated memory is still 83.9MB. Free memory was 60.2MB in the beginning and 48.1MB in the end (delta: 12.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.88ms. Allocated memory is still 83.9MB. Free memory was 48.1MB in the beginning and 46.7MB in the end (delta: 1.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 62.42ms. Allocated memory is still 83.9MB. Free memory was 46.7MB in the beginning and 45.1MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 441.57ms. Allocated memory is still 83.9MB. Free memory was 44.8MB in the beginning and 31.2MB in the end (delta: 13.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 5861.44ms. Allocated memory is still 83.9MB. Free memory was 30.5MB in the beginning and 28.3MB in the end (delta: 2.3MB). Peak memory consumption was 4.9MB. Max. memory is 16.1GB. * Witness Printer took 161.37ms. Allocated memory is still 83.9MB. Free memory was 28.3MB in the beginning and 21.8MB in the end (delta: 6.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 20]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L31] char string_A[5], string_B[5]; [L32] int i, j, nc_A, nc_B, found=0; [L35] i=0 VAL [i=0, string_A={65537:0}, string_B={98305:0}] [L35] COND TRUE i<5 VAL [i=0, string_A={65537:0}, string_B={98305:0}] [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [i=1, string_A={65537:0}, string_B={98305:0}] [L35] COND TRUE i<5 VAL [i=1, string_A={65537:0}, string_B={98305:0}] [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [i=2, string_A={65537:0}, string_B={98305:0}] [L35] COND TRUE i<5 VAL [i=2, string_A={65537:0}, string_B={98305:0}] [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [i=3, string_A={65537:0}, string_B={98305:0}] [L35] COND TRUE i<5 VAL [i=3, string_A={65537:0}, string_B={98305:0}] [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [i=4, string_A={65537:0}, string_B={98305:0}] [L35] COND TRUE i<5 VAL [i=4, string_A={65537:0}, string_B={98305:0}] [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ VAL [i=5, string_A={65537:0}, string_B={98305:0}] [L35] COND FALSE !(i<5) VAL [string_A={65537:0}, string_B={98305:0}] [L37] EXPR string_A[5 -1] [L37] COND FALSE !(!(string_A[5 -1]=='\0')) [L39] i=0 VAL [i=0, string_A={65537:0}, string_B={98305:0}] [L39] COND TRUE i<5 VAL [i=0, string_A={65537:0}, string_B={98305:0}] [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [i=1, string_A={65537:0}, string_B={98305:0}] [L39] COND TRUE i<5 VAL [i=1, string_A={65537:0}, string_B={98305:0}] [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [i=2, string_A={65537:0}, string_B={98305:0}] [L39] COND TRUE i<5 VAL [i=2, string_A={65537:0}, string_B={98305:0}] [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [i=3, string_A={65537:0}, string_B={98305:0}] [L39] COND TRUE i<5 VAL [i=3, string_A={65537:0}, string_B={98305:0}] [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [i=4, string_A={65537:0}, string_B={98305:0}] [L39] COND TRUE i<5 VAL [i=4, string_A={65537:0}, string_B={98305:0}] [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ VAL [i=5, string_A={65537:0}, string_B={98305:0}] [L39] COND FALSE !(i<5) VAL [string_A={65537:0}, string_B={98305:0}] [L41] EXPR string_B[5 -1] [L41] COND FALSE !(!(string_B[5 -1]=='\0')) [L43] nc_A = 0 VAL [nc_A=0, string_A={65537:0}, string_B={98305:0}] [L44] EXPR string_A[nc_A] [L44] COND TRUE string_A[nc_A]!='\0' [L45] nc_A++ VAL [nc_A=1, string_A={65537:0}, string_B={98305:0}] [L44] EXPR string_A[nc_A] [L44] COND FALSE !(string_A[nc_A]!='\0') [L47] nc_B = 0 VAL [nc_A=1, nc_B=0, string_A={65537:0}, string_B={98305:0}] [L48] EXPR string_B[nc_B] [L48] COND TRUE string_B[nc_B]!='\0' [L49] nc_B++ VAL [nc_A=1, nc_B=1, string_A={65537:0}, string_B={98305:0}] [L48] EXPR string_B[nc_B] [L48] COND FALSE !(string_B[nc_B]!='\0') [L51] COND FALSE !(!(nc_B >= nc_A)) [L54] EXPR j=0 [L54] i=j=0 VAL [i=0, j=0, nc_A=1, nc_B=1, string_A={65537:0}, string_B={98305:0}] [L55] COND TRUE (inc_B-1)<