./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_compareModified_ground.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_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_compareModified_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ec4d4b5cea975144b4de3d9f9eb9b04d1c4b7aa6b7464f360f53530c4a9bd50e --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 11:36:49,861 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 11:36:49,915 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-12-02 11:36:49,920 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 11:36:49,920 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 11:36:49,939 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 11:36:49,940 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 11:36:49,940 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 11:36:49,940 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 11:36:49,940 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 11:36:49,940 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 11:36:49,940 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 11:36:49,941 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 11:36:49,941 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 11:36:49,941 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 11:36:49,941 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 11:36:49,941 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 11:36:49,941 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 11:36:49,941 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 11:36:49,941 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 11:36:49,941 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 11:36:49,941 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 11:36:49,941 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 11:36:49,942 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 11:36:49,942 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 11:36:49,942 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 11:36:49,942 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 11:36:49,942 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 11:36:49,942 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 11:36:49,942 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 11:36:49,942 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 11:36:49,942 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 11:36:49,942 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 11:36:49,942 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 11:36:49,942 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 11:36:49,942 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 11:36:49,943 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 11:36:49,943 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 11:36:49,943 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 11:36:49,943 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 11:36:49,943 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 11:36:49,943 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 11:36:49,943 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 11:36:49,943 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 11:36:49,943 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 11:36:49,943 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 11:36:49,943 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 11:36:49,943 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 11:36:49,943 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_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec4d4b5cea975144b4de3d9f9eb9b04d1c4b7aa6b7464f360f53530c4a9bd50e [2024-12-02 11:36:50,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 11:36:50,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 11:36:50,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 11:36:50,182 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 11:36:50,183 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 11:36:50,184 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/array-examples/standard_compareModified_ground.i [2024-12-02 11:36:52,819 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/data/fbc830947/3aaf550eb4e040b4abea7f2a3f4e02cd/FLAG2223d6981 [2024-12-02 11:36:53,006 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 11:36:53,007 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/sv-benchmarks/c/array-examples/standard_compareModified_ground.i [2024-12-02 11:36:53,014 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/data/fbc830947/3aaf550eb4e040b4abea7f2a3f4e02cd/FLAG2223d6981 [2024-12-02 11:36:53,033 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/data/fbc830947/3aaf550eb4e040b4abea7f2a3f4e02cd [2024-12-02 11:36:53,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 11:36:53,038 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 11:36:53,039 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 11:36:53,039 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 11:36:53,043 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 11:36:53,044 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 11:36:53" (1/1) ... [2024-12-02 11:36:53,045 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@109069b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:36:53, skipping insertion in model container [2024-12-02 11:36:53,045 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 11:36:53" (1/1) ... [2024-12-02 11:36:53,059 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 11:36:53,190 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_1827a588-ff26-4ca4-91b6-70838187e234/sv-benchmarks/c/array-examples/standard_compareModified_ground.i[824,837] [2024-12-02 11:36:53,207 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 11:36:53,215 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 11:36:53,225 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_1827a588-ff26-4ca4-91b6-70838187e234/sv-benchmarks/c/array-examples/standard_compareModified_ground.i[824,837] [2024-12-02 11:36:53,233 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 11:36:53,247 INFO L204 MainTranslator]: Completed translation [2024-12-02 11:36:53,247 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:36:53 WrapperNode [2024-12-02 11:36:53,248 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 11:36:53,249 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 11:36:53,249 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 11:36:53,249 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 11:36:53,255 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:36:53" (1/1) ... [2024-12-02 11:36:53,262 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:36:53" (1/1) ... [2024-12-02 11:36:53,278 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 84 [2024-12-02 11:36:53,278 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 11:36:53,279 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 11:36:53,279 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 11:36:53,279 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 11:36:53,288 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:36:53" (1/1) ... [2024-12-02 11:36:53,288 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:36:53" (1/1) ... [2024-12-02 11:36:53,290 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:36:53" (1/1) ... [2024-12-02 11:36:53,301 INFO L175 MemorySlicer]: Split 12 memory accesses to 4 slices as follows [2, 2, 5, 3]. 42 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-12-02 11:36:53,302 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:36:53" (1/1) ... [2024-12-02 11:36:53,302 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:36:53" (1/1) ... [2024-12-02 11:36:53,307 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:36:53" (1/1) ... [2024-12-02 11:36:53,308 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:36:53" (1/1) ... [2024-12-02 11:36:53,311 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:36:53" (1/1) ... [2024-12-02 11:36:53,312 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:36:53" (1/1) ... [2024-12-02 11:36:53,313 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:36:53" (1/1) ... [2024-12-02 11:36:53,315 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 11:36:53,315 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 11:36:53,315 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 11:36:53,315 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 11:36:53,316 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:36:53" (1/1) ... [2024-12-02 11:36:53,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 11:36:53,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:36:53,345 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 11:36:53,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 11:36:53,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 11:36:53,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 11:36:53,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 11:36:53,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-12-02 11:36:53,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-12-02 11:36:53,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-12-02 11:36:53,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 11:36:53,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 11:36:53,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-12-02 11:36:53,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-12-02 11:36:53,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 11:36:53,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 11:36:53,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 11:36:53,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 11:36:53,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-12-02 11:36:53,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-12-02 11:36:53,373 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-12-02 11:36:53,373 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-12-02 11:36:53,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-12-02 11:36:53,442 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 11:36:53,444 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 11:36:53,580 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-12-02 11:36:53,581 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 11:36:53,587 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 11:36:53,588 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-12-02 11:36:53,588 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 11:36:53 BoogieIcfgContainer [2024-12-02 11:36:53,588 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 11:36:53,589 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 11:36:53,590 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 11:36:53,593 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 11:36:53,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 11:36:53" (1/3) ... [2024-12-02 11:36:53,593 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@315ebf00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 11:36:53, skipping insertion in model container [2024-12-02 11:36:53,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:36:53" (2/3) ... [2024-12-02 11:36:53,593 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@315ebf00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 11:36:53, skipping insertion in model container [2024-12-02 11:36:53,593 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 11:36:53" (3/3) ... [2024-12-02 11:36:53,594 INFO L128 eAbstractionObserver]: Analyzing ICFG standard_compareModified_ground.i [2024-12-02 11:36:53,607 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 11:36:53,608 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG standard_compareModified_ground.i that has 2 procedures, 30 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-12-02 11:36:53,653 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 11:36:53,663 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;@6259fdf7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 11:36:53,663 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-12-02 11:36:53,667 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 11:36:53,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-12-02 11:36:53,671 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:36:53,672 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:36:53,672 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 11:36:53,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:36:53,677 INFO L85 PathProgramCache]: Analyzing trace with hash -451891880, now seen corresponding path program 1 times [2024-12-02 11:36:53,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:36:53,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312778770] [2024-12-02 11:36:53,684 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:36:53,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:36:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:36:53,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:36:53,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:36:53,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312778770] [2024-12-02 11:36:53,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312778770] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:36:53,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:36:53,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 11:36:53,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561623256] [2024-12-02 11:36:53,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:36:53,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 11:36:53,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:36:53,873 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 11:36:53,874 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 11:36:53,876 INFO L87 Difference]: Start difference. First operand has 30 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:36:53,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:36:53,908 INFO L93 Difference]: Finished difference Result 58 states and 82 transitions. [2024-12-02 11:36:53,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 11:36:53,910 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-12-02 11:36:53,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:36:53,915 INFO L225 Difference]: With dead ends: 58 [2024-12-02 11:36:53,915 INFO L226 Difference]: Without dead ends: 28 [2024-12-02 11:36:53,917 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 [2024-12-02 11:36:53,920 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 11:36:53,920 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 64 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 11:36:53,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-12-02 11:36:53,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2024-12-02 11:36:53,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 11:36:53,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2024-12-02 11:36:53,943 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 13 [2024-12-02 11:36:53,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:36:53,943 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2024-12-02 11:36:53,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:36:53,943 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2024-12-02 11:36:53,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-12-02 11:36:53,944 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:36:53,944 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:36:53,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 11:36:53,944 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 11:36:53,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:36:53,945 INFO L85 PathProgramCache]: Analyzing trace with hash 177748361, now seen corresponding path program 1 times [2024-12-02 11:36:53,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:36:53,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289265543] [2024-12-02 11:36:53,945 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:36:53,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:36:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:36:54,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 11:36:54,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:36:54,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289265543] [2024-12-02 11:36:54,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289265543] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:36:54,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:36:54,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 11:36:54,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402713015] [2024-12-02 11:36:54,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:36:54,028 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 11:36:54,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:36:54,029 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 11:36:54,029 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 11:36:54,029 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:36:54,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:36:54,047 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2024-12-02 11:36:54,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 11:36:54,048 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-12-02 11:36:54,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:36:54,048 INFO L225 Difference]: With dead ends: 48 [2024-12-02 11:36:54,048 INFO L226 Difference]: Without dead ends: 31 [2024-12-02 11:36:54,049 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 [2024-12-02 11:36:54,049 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 11:36:54,050 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 52 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 11:36:54,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-12-02 11:36:54,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2024-12-02 11:36:54,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 11:36:54,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2024-12-02 11:36:54,055 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 15 [2024-12-02 11:36:54,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:36:54,055 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2024-12-02 11:36:54,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:36:54,055 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2024-12-02 11:36:54,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-12-02 11:36:54,056 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:36:54,056 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:36:54,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 11:36:54,056 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 11:36:54,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:36:54,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1264560033, now seen corresponding path program 1 times [2024-12-02 11:36:54,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:36:54,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009658727] [2024-12-02 11:36:54,057 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:36:54,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:36:54,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:36:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 11:36:54,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:36:54,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009658727] [2024-12-02 11:36:54,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009658727] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:36:54,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586081441] [2024-12-02 11:36:54,145 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:36:54,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:36:54,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:36:54,147 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:36:54,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 11:36:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:36:54,221 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 11:36:54,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:36:54,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 11:36:54,249 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 11:36:54,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586081441] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:36:54,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 11:36:54,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-12-02 11:36:54,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683897430] [2024-12-02 11:36:54,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:36:54,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 11:36:54,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:36:54,250 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 11:36:54,250 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 11:36:54,250 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:36:54,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:36:54,269 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2024-12-02 11:36:54,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 11:36:54,269 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-12-02 11:36:54,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:36:54,270 INFO L225 Difference]: With dead ends: 49 [2024-12-02 11:36:54,270 INFO L226 Difference]: Without dead ends: 34 [2024-12-02 11:36:54,270 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 11:36:54,271 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 3 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 11:36:54,271 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 63 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 11:36:54,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-12-02 11:36:54,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-12-02 11:36:54,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 11:36:54,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2024-12-02 11:36:54,277 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 19 [2024-12-02 11:36:54,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:36:54,277 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2024-12-02 11:36:54,277 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:36:54,277 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2024-12-02 11:36:54,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-12-02 11:36:54,278 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:36:54,278 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:36:54,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 11:36:54,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:36:54,479 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 11:36:54,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:36:54,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1965624611, now seen corresponding path program 1 times [2024-12-02 11:36:54,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:36:54,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093282373] [2024-12-02 11:36:54,479 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:36:54,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:36:54,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:36:54,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 11:36:54,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:36:54,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093282373] [2024-12-02 11:36:54,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093282373] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:36:54,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043377490] [2024-12-02 11:36:54,540 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:36:54,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:36:54,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:36:54,542 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:36:54,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 11:36:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:36:54,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 11:36:54,610 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:36:54,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 11:36:54,639 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:36:54,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 11:36:54,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043377490] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:36:54,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:36:54,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-12-02 11:36:54,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069364810] [2024-12-02 11:36:54,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:36:54,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 11:36:54,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:36:54,665 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 11:36:54,665 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-12-02 11:36:54,665 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:36:54,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:36:54,695 INFO L93 Difference]: Finished difference Result 69 states and 87 transitions. [2024-12-02 11:36:54,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 11:36:54,695 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-12-02 11:36:54,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:36:54,696 INFO L225 Difference]: With dead ends: 69 [2024-12-02 11:36:54,696 INFO L226 Difference]: Without dead ends: 40 [2024-12-02 11:36:54,696 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-12-02 11:36:54,697 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 11:36:54,697 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 84 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 11:36:54,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-12-02 11:36:54,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-12-02 11:36:54,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 11:36:54,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-12-02 11:36:54,703 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 19 [2024-12-02 11:36:54,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:36:54,703 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-12-02 11:36:54,703 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:36:54,703 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-12-02 11:36:54,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-12-02 11:36:54,704 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:36:54,704 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:36:54,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 11:36:54,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:36:54,904 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 11:36:54,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:36:54,905 INFO L85 PathProgramCache]: Analyzing trace with hash -2103915305, now seen corresponding path program 2 times [2024-12-02 11:36:54,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:36:54,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224923892] [2024-12-02 11:36:54,905 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 11:36:54,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:36:54,939 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 11:36:54,939 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:36:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-12-02 11:36:55,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:36:55,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224923892] [2024-12-02 11:36:55,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224923892] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:36:55,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083970633] [2024-12-02 11:36:55,004 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 11:36:55,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:36:55,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:36:55,006 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:36:55,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 11:36:55,082 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 11:36:55,082 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:36:55,083 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-02 11:36:55,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:36:55,136 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 11:36:55,136 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:36:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 11:36:55,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083970633] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:36:55,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:36:55,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2024-12-02 11:36:55,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673171050] [2024-12-02 11:36:55,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:36:55,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 11:36:55,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:36:55,209 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 11:36:55,209 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2024-12-02 11:36:55,210 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:36:55,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:36:55,385 INFO L93 Difference]: Finished difference Result 93 states and 119 transitions. [2024-12-02 11:36:55,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 11:36:55,385 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-12-02 11:36:55,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:36:55,386 INFO L225 Difference]: With dead ends: 93 [2024-12-02 11:36:55,386 INFO L226 Difference]: Without dead ends: 64 [2024-12-02 11:36:55,387 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2024-12-02 11:36:55,387 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 11:36:55,388 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 217 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 11:36:55,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-12-02 11:36:55,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2024-12-02 11:36:55,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 54 states have internal predecessors, (63), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 11:36:55,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2024-12-02 11:36:55,395 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 25 [2024-12-02 11:36:55,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:36:55,395 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2024-12-02 11:36:55,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:36:55,395 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2024-12-02 11:36:55,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-12-02 11:36:55,396 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:36:55,396 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:36:55,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-12-02 11:36:55,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:36:55,597 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 11:36:55,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:36:55,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1833947097, now seen corresponding path program 3 times [2024-12-02 11:36:55,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:36:55,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204287218] [2024-12-02 11:36:55,597 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 11:36:55,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:36:55,631 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 11:36:55,631 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:36:55,688 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-12-02 11:36:55,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:36:55,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204287218] [2024-12-02 11:36:55,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204287218] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:36:55,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011735748] [2024-12-02 11:36:55,689 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 11:36:55,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:36:55,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:36:55,692 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:36:55,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 11:36:55,782 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 11:36:55,783 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:36:55,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 11:36:55,785 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:36:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-12-02 11:36:55,840 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:36:55,915 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-12-02 11:36:55,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011735748] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:36:55,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:36:55,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-12-02 11:36:55,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565305222] [2024-12-02 11:36:55,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:36:55,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 11:36:55,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:36:55,916 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 11:36:55,916 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-12-02 11:36:55,916 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:36:55,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:36:55,964 INFO L93 Difference]: Finished difference Result 109 states and 137 transitions. [2024-12-02 11:36:55,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 11:36:55,965 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-12-02 11:36:55,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:36:55,966 INFO L225 Difference]: With dead ends: 109 [2024-12-02 11:36:55,966 INFO L226 Difference]: Without dead ends: 90 [2024-12-02 11:36:55,966 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-12-02 11:36:55,967 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 16 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 11:36:55,967 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 104 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 11:36:55,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-12-02 11:36:55,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2024-12-02 11:36:55,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 86 states have (on average 1.197674418604651) internal successors, (103), 86 states have internal predecessors, (103), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 11:36:55,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 107 transitions. [2024-12-02 11:36:55,976 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 107 transitions. Word has length 41 [2024-12-02 11:36:55,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:36:55,976 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 107 transitions. [2024-12-02 11:36:55,977 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:36:55,977 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 107 transitions. [2024-12-02 11:36:55,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-12-02 11:36:55,978 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:36:55,978 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:36:55,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 11:36:56,178 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-12-02 11:36:56,178 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 11:36:56,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:36:56,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1905635263, now seen corresponding path program 4 times [2024-12-02 11:36:56,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:36:56,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997058224] [2024-12-02 11:36:56,179 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 11:36:56,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:36:56,214 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 11:36:56,214 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:36:56,402 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-12-02 11:36:56,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:36:56,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997058224] [2024-12-02 11:36:56,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997058224] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:36:56,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335990416] [2024-12-02 11:36:56,402 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 11:36:56,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:36:56,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:36:56,404 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:36:56,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 11:36:56,543 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 11:36:56,543 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:36:56,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 11:36:56,546 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:36:56,613 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-12-02 11:36:56,613 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:36:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-12-02 11:36:56,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335990416] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:36:56,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:36:56,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-12-02 11:36:56,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394354400] [2024-12-02 11:36:56,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:36:56,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-12-02 11:36:56,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:36:56,756 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-12-02 11:36:56,756 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2024-12-02 11:36:56,757 INFO L87 Difference]: Start difference. First operand 90 states and 107 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:36:56,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:36:56,830 INFO L93 Difference]: Finished difference Result 173 states and 225 transitions. [2024-12-02 11:36:56,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-12-02 11:36:56,830 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2024-12-02 11:36:56,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:36:56,831 INFO L225 Difference]: With dead ends: 173 [2024-12-02 11:36:56,831 INFO L226 Difference]: Without dead ends: 154 [2024-12-02 11:36:56,832 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2024-12-02 11:36:56,832 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 43 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 11:36:56,833 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 118 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 11:36:56,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-12-02 11:36:56,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2024-12-02 11:36:56,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 150 states have (on average 1.22) internal successors, (183), 150 states have internal predecessors, (183), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 11:36:56,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 187 transitions. [2024-12-02 11:36:56,845 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 187 transitions. Word has length 57 [2024-12-02 11:36:56,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:36:56,846 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 187 transitions. [2024-12-02 11:36:56,846 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:36:56,846 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 187 transitions. [2024-12-02 11:36:56,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-12-02 11:36:56,847 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:36:56,847 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:36:56,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-12-02 11:36:57,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-12-02 11:36:57,048 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 11:36:57,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:36:57,048 INFO L85 PathProgramCache]: Analyzing trace with hash 642113809, now seen corresponding path program 5 times [2024-12-02 11:36:57,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:36:57,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090737526] [2024-12-02 11:36:57,048 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 11:36:57,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:36:57,132 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-12-02 11:36:57,132 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:36:57,381 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-12-02 11:36:57,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:36:57,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090737526] [2024-12-02 11:36:57,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090737526] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:36:57,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035755826] [2024-12-02 11:36:57,381 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 11:36:57,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:36:57,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:36:57,383 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:36:57,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 11:38:18,884 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-12-02 11:38:18,884 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:38:18,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-02 11:38:18,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:38:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-12-02 11:38:18,948 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:38:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-12-02 11:38:19,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035755826] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:38:19,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:38:19,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2024-12-02 11:38:19,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965781040] [2024-12-02 11:38:19,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:38:19,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-12-02 11:38:19,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:38:19,152 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-12-02 11:38:19,152 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2024-12-02 11:38:19,152 INFO L87 Difference]: Start difference. First operand 154 states and 187 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:38:19,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:38:19,239 INFO L93 Difference]: Finished difference Result 309 states and 386 transitions. [2024-12-02 11:38:19,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-12-02 11:38:19,240 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2024-12-02 11:38:19,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:38:19,241 INFO L225 Difference]: With dead ends: 309 [2024-12-02 11:38:19,241 INFO L226 Difference]: Without dead ends: 178 [2024-12-02 11:38:19,242 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2024-12-02 11:38:19,243 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 11:38:19,243 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 165 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 11:38:19,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-12-02 11:38:19,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2024-12-02 11:38:19,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 174 states have (on average 1.1896551724137931) internal successors, (207), 174 states have internal predecessors, (207), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 11:38:19,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 211 transitions. [2024-12-02 11:38:19,258 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 211 transitions. Word has length 89 [2024-12-02 11:38:19,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:38:19,258 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 211 transitions. [2024-12-02 11:38:19,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:38:19,258 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 211 transitions. [2024-12-02 11:38:19,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-12-02 11:38:19,260 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:38:19,260 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:38:19,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 11:38:19,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:38:19,461 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 11:38:19,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:38:19,461 INFO L85 PathProgramCache]: Analyzing trace with hash 176880097, now seen corresponding path program 6 times [2024-12-02 11:38:19,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:38:19,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790471377] [2024-12-02 11:38:19,461 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 11:38:19,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:38:19,536 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-12-02 11:38:19,536 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:38:20,075 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 822 trivial. 0 not checked. [2024-12-02 11:38:20,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:38:20,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790471377] [2024-12-02 11:38:20,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790471377] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:38:20,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898230166] [2024-12-02 11:38:20,076 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 11:38:20,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:38:20,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:38:20,078 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:38:20,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 11:38:20,282 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-12-02 11:38:20,282 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:38:20,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-12-02 11:38:20,288 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:38:20,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-12-02 11:38:20,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-12-02 11:38:21,016 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 822 trivial. 0 not checked. [2024-12-02 11:38:21,016 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:38:21,194 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-12-02 11:38:21,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 23 [2024-12-02 11:38:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 822 trivial. 0 not checked. [2024-12-02 11:38:21,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898230166] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:38:21,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:38:21,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2024-12-02 11:38:21,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498082852] [2024-12-02 11:38:21,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:38:21,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-12-02 11:38:21,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:38:21,262 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-12-02 11:38:21,262 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-12-02 11:38:21,262 INFO L87 Difference]: Start difference. First operand 178 states and 211 transitions. Second operand has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:38:21,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:38:21,459 INFO L93 Difference]: Finished difference Result 258 states and 308 transitions. [2024-12-02 11:38:21,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 11:38:21,459 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2024-12-02 11:38:21,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:38:21,461 INFO L225 Difference]: With dead ends: 258 [2024-12-02 11:38:21,461 INFO L226 Difference]: Without dead ends: 247 [2024-12-02 11:38:21,461 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 218 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2024-12-02 11:38:21,462 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 23 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 11:38:21,462 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 248 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 11:38:21,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-12-02 11:38:21,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 185. [2024-12-02 11:38:21,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 179 states have (on average 1.1843575418994414) internal successors, (212), 180 states have internal predecessors, (212), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-12-02 11:38:21,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 218 transitions. [2024-12-02 11:38:21,477 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 218 transitions. Word has length 113 [2024-12-02 11:38:21,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:38:21,478 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 218 transitions. [2024-12-02 11:38:21,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:38:21,478 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 218 transitions. [2024-12-02 11:38:21,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-12-02 11:38:21,479 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:38:21,479 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:38:21,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 11:38:21,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:38:21,680 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 11:38:21,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:38:21,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1913626457, now seen corresponding path program 1 times [2024-12-02 11:38:21,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:38:21,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936977504] [2024-12-02 11:38:21,681 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:38:21,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:38:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:38:22,364 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-12-02 11:38:22,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:38:22,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936977504] [2024-12-02 11:38:22,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936977504] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:38:22,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621666422] [2024-12-02 11:38:22,365 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:38:22,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:38:22,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:38:22,367 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:38:22,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 11:38:22,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:38:22,573 INFO L256 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-12-02 11:38:22,576 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:38:22,649 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-12-02 11:38:22,649 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:38:23,328 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-12-02 11:38:23,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621666422] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:38:23,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:38:23,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-12-02 11:38:23,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634185030] [2024-12-02 11:38:23,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:38:23,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-12-02 11:38:23,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:38:23,330 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-12-02 11:38:23,331 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-12-02 11:38:23,331 INFO L87 Difference]: Start difference. First operand 185 states and 218 transitions. Second operand has 49 states, 49 states have (on average 2.2448979591836733) internal successors, (110), 49 states have internal predecessors, (110), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:38:23,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:38:23,474 INFO L93 Difference]: Finished difference Result 371 states and 460 transitions. [2024-12-02 11:38:23,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-12-02 11:38:23,475 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2448979591836733) internal successors, (110), 49 states have internal predecessors, (110), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2024-12-02 11:38:23,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:38:23,477 INFO L225 Difference]: With dead ends: 371 [2024-12-02 11:38:23,477 INFO L226 Difference]: Without dead ends: 233 [2024-12-02 11:38:23,479 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2024-12-02 11:38:23,479 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 11:38:23,479 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 138 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 11:38:23,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2024-12-02 11:38:23,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2024-12-02 11:38:23,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 227 states have (on average 1.145374449339207) internal successors, (260), 228 states have internal predecessors, (260), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-12-02 11:38:23,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 266 transitions. [2024-12-02 11:38:23,495 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 266 transitions. Word has length 114 [2024-12-02 11:38:23,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:38:23,495 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 266 transitions. [2024-12-02 11:38:23,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2448979591836733) internal successors, (110), 49 states have internal predecessors, (110), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:38:23,496 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 266 transitions. [2024-12-02 11:38:23,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2024-12-02 11:38:23,497 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:38:23,497 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:38:23,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 11:38:23,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-12-02 11:38:23,698 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 11:38:23,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:38:23,698 INFO L85 PathProgramCache]: Analyzing trace with hash -108138055, now seen corresponding path program 2 times [2024-12-02 11:38:23,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:38:23,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881102323] [2024-12-02 11:38:23,698 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 11:38:23,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:38:23,793 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 11:38:23,793 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:38:25,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-12-02 11:38:25,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:38:25,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881102323] [2024-12-02 11:38:25,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881102323] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:38:25,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428830123] [2024-12-02 11:38:25,513 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 11:38:25,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:38:25,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:38:25,515 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:38:25,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 11:38:25,747 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 11:38:25,747 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:38:25,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-12-02 11:38:25,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:38:25,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-12-02 11:38:25,858 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:38:28,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-12-02 11:38:28,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428830123] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:38:28,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:38:28,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2024-12-02 11:38:28,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142751303] [2024-12-02 11:38:28,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:38:28,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-12-02 11:38:28,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:38:28,064 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-12-02 11:38:28,065 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2024-12-02 11:38:28,065 INFO L87 Difference]: Start difference. First operand 233 states and 266 transitions. Second operand has 97 states, 97 states have (on average 2.1237113402061856) internal successors, (206), 97 states have internal predecessors, (206), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:38:28,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:38:28,319 INFO L93 Difference]: Finished difference Result 467 states and 580 transitions. [2024-12-02 11:38:28,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-12-02 11:38:28,320 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.1237113402061856) internal successors, (206), 97 states have internal predecessors, (206), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 162 [2024-12-02 11:38:28,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:38:28,322 INFO L225 Difference]: With dead ends: 467 [2024-12-02 11:38:28,322 INFO L226 Difference]: Without dead ends: 329 [2024-12-02 11:38:28,324 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2024-12-02 11:38:28,324 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 11:38:28,324 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 165 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 11:38:28,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2024-12-02 11:38:28,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2024-12-02 11:38:28,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 323 states have (on average 1.1021671826625388) internal successors, (356), 324 states have internal predecessors, (356), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-12-02 11:38:28,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 362 transitions. [2024-12-02 11:38:28,335 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 362 transitions. Word has length 162 [2024-12-02 11:38:28,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:38:28,335 INFO L471 AbstractCegarLoop]: Abstraction has 329 states and 362 transitions. [2024-12-02 11:38:28,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.1237113402061856) internal successors, (206), 97 states have internal predecessors, (206), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:38:28,335 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 362 transitions. [2024-12-02 11:38:28,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2024-12-02 11:38:28,337 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:38:28,337 INFO L218 NwaCegarLoop]: trace histogram [94, 94, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:38:28,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 11:38:28,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:38:28,538 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 11:38:28,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:38:28,538 INFO L85 PathProgramCache]: Analyzing trace with hash -422324615, now seen corresponding path program 3 times [2024-12-02 11:38:28,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:38:28,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502214520] [2024-12-02 11:38:28,538 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 11:38:28,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:38:28,719 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-12-02 11:38:28,719 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:38:28,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9214 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 8836 trivial. 0 not checked. [2024-12-02 11:38:28,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:38:28,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502214520] [2024-12-02 11:38:28,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502214520] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:38:28,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95175966] [2024-12-02 11:38:28,980 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 11:38:28,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:38:28,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:38:28,981 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:38:28,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 11:38:35,636 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-12-02 11:38:35,636 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:38:35,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-12-02 11:38:35,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:38:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9214 backedges. 187 proven. 378 refuted. 0 times theorem prover too weak. 8649 trivial. 0 not checked. [2024-12-02 11:38:35,866 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:38:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9214 backedges. 0 proven. 565 refuted. 0 times theorem prover too weak. 8649 trivial. 0 not checked. [2024-12-02 11:38:36,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95175966] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:38:36,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:38:36,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 19] total 37 [2024-12-02 11:38:36,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904408114] [2024-12-02 11:38:36,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:38:36,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-12-02 11:38:36,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:38:36,328 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-12-02 11:38:36,328 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=696, Unknown=0, NotChecked=0, Total=1332 [2024-12-02 11:38:36,328 INFO L87 Difference]: Start difference. First operand 329 states and 362 transitions. Second operand has 37 states, 37 states have (on average 3.945945945945946) internal successors, (146), 37 states have internal predecessors, (146), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:38:36,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:38:36,467 INFO L93 Difference]: Finished difference Result 483 states and 583 transitions. [2024-12-02 11:38:36,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-12-02 11:38:36,467 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.945945945945946) internal successors, (146), 37 states have internal predecessors, (146), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 258 [2024-12-02 11:38:36,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:38:36,470 INFO L225 Difference]: With dead ends: 483 [2024-12-02 11:38:36,470 INFO L226 Difference]: Without dead ends: 457 [2024-12-02 11:38:36,470 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=710, Invalid=772, Unknown=0, NotChecked=0, Total=1482 [2024-12-02 11:38:36,470 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 98 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 11:38:36,471 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 195 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 11:38:36,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2024-12-02 11:38:36,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 457. [2024-12-02 11:38:36,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 451 states have (on average 1.1441241685144123) internal successors, (516), 452 states have internal predecessors, (516), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-12-02 11:38:36,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 522 transitions. [2024-12-02 11:38:36,485 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 522 transitions. Word has length 258 [2024-12-02 11:38:36,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:38:36,485 INFO L471 AbstractCegarLoop]: Abstraction has 457 states and 522 transitions. [2024-12-02 11:38:36,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.945945945945946) internal successors, (146), 37 states have internal predecessors, (146), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:38:36,485 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 522 transitions. [2024-12-02 11:38:36,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2024-12-02 11:38:36,488 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:38:36,488 INFO L218 NwaCegarLoop]: trace histogram [94, 94, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:38:36,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 11:38:36,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:38:36,688 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 11:38:36,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:38:36,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1632656135, now seen corresponding path program 4 times [2024-12-02 11:38:36,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:38:36,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606057670] [2024-12-02 11:38:36,689 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 11:38:36,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:38:36,833 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 11:38:36,833 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:38:38,446 INFO L134 CoverageAnalysis]: Checked inductivity of 10606 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 8836 trivial. 0 not checked. [2024-12-02 11:38:38,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:38:38,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606057670] [2024-12-02 11:38:38,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606057670] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:38:38,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800343526] [2024-12-02 11:38:38,446 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 11:38:38,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:38:38,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:38:38,448 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:38:38,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 11:38:39,333 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 11:38:39,333 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:38:39,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 1907 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-12-02 11:38:39,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:38:39,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10606 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 8836 trivial. 0 not checked. [2024-12-02 11:38:39,603 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:38:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 10606 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 8836 trivial. 0 not checked. [2024-12-02 11:38:40,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800343526] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:38:40,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:38:40,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 64 [2024-12-02 11:38:40,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108603547] [2024-12-02 11:38:40,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:38:40,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-12-02 11:38:40,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:38:40,663 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-12-02 11:38:40,664 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2024-12-02 11:38:40,664 INFO L87 Difference]: Start difference. First operand 457 states and 522 transitions. Second operand has 64 states, 64 states have (on average 4.078125) internal successors, (261), 64 states have internal predecessors, (261), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:38:40,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:38:40,964 INFO L93 Difference]: Finished difference Result 739 states and 935 transitions. [2024-12-02 11:38:40,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-12-02 11:38:40,965 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 4.078125) internal successors, (261), 64 states have internal predecessors, (261), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 322 [2024-12-02 11:38:40,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:38:40,967 INFO L225 Difference]: With dead ends: 739 [2024-12-02 11:38:40,967 INFO L226 Difference]: Without dead ends: 713 [2024-12-02 11:38:40,967 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 675 GetRequests, 613 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2024-12-02 11:38:40,968 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 235 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 11:38:40,968 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 235 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 11:38:40,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2024-12-02 11:38:40,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 713. [2024-12-02 11:38:40,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 707 states have (on average 1.1824611032531824) internal successors, (836), 708 states have internal predecessors, (836), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-12-02 11:38:40,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 842 transitions. [2024-12-02 11:38:40,988 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 842 transitions. Word has length 322 [2024-12-02 11:38:40,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:38:40,988 INFO L471 AbstractCegarLoop]: Abstraction has 713 states and 842 transitions. [2024-12-02 11:38:40,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 4.078125) internal successors, (261), 64 states have internal predecessors, (261), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:38:40,989 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 842 transitions. [2024-12-02 11:38:40,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2024-12-02 11:38:40,990 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:38:40,990 INFO L218 NwaCegarLoop]: trace histogram [94, 94, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:38:40,999 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-12-02 11:38:41,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-12-02 11:38:41,191 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 11:38:41,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:38:41,191 INFO L85 PathProgramCache]: Analyzing trace with hash 2102084089, now seen corresponding path program 5 times [2024-12-02 11:38:41,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:38:41,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76273617] [2024-12-02 11:38:41,192 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 11:38:41,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:38:46,282 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 95 check-sat command(s) [2024-12-02 11:38:46,282 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:38:49,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16462 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 8836 trivial. 0 not checked. [2024-12-02 11:38:49,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:38:49,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76273617] [2024-12-02 11:38:49,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76273617] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:38:49,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038889193] [2024-12-02 11:38:49,782 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 11:38:49,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:38:49,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:38:49,783 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:38:49,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1827a588-ff26-4ca4-91b6-70838187e234/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process