./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/egcd2-ll.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/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_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench/egcd2-ll.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/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_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/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 ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 10:17:14,187 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 10:17:14,245 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-12-02 10:17:14,249 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 10:17:14,250 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 10:17:14,270 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 10:17:14,271 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 10:17:14,271 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 10:17:14,272 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 10:17:14,272 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 10:17:14,272 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 10:17:14,272 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 10:17:14,272 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 10:17:14,273 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 10:17:14,273 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 10:17:14,273 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 10:17:14,273 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-02 10:17:14,273 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 10:17:14,273 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 10:17:14,273 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 10:17:14,273 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 10:17:14,273 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-02 10:17:14,273 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 10:17:14,274 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-02 10:17:14,274 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 10:17:14,274 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-02 10:17:14,274 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 10:17:14,274 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 10:17:14,274 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 10:17:14,274 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 10:17:14,274 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 10:17:14,274 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 10:17:14,274 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 10:17:14,274 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 10:17:14,274 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 10:17:14,275 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 10:17:14,275 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 10:17:14,275 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 10:17:14,275 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 10:17:14,275 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 10:17:14,275 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-02 10:17:14,275 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-02 10:17:14,275 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 10:17:14,275 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 10:17:14,275 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 10:17:14,275 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 10:17:14,276 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 10:17:14,276 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 10:17:14,276 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_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/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 -> ed6536c9cb0e4b2be9a327fc4a25c6bfba6e98b1dfb78e314dd25bca8cbdb087 [2024-12-02 10:17:14,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 10:17:14,514 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 10:17:14,517 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 10:17:14,518 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 10:17:14,518 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 10:17:14,519 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/nla-digbench/egcd2-ll.c [2024-12-02 10:17:17,221 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/data/3b476639e/4cc874e2dd8043f48368145b7ae39a33/FLAGe0b6a069c [2024-12-02 10:17:17,440 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 10:17:17,440 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/sv-benchmarks/c/nla-digbench/egcd2-ll.c [2024-12-02 10:17:17,448 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/data/3b476639e/4cc874e2dd8043f48368145b7ae39a33/FLAGe0b6a069c [2024-12-02 10:17:17,797 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/data/3b476639e/4cc874e2dd8043f48368145b7ae39a33 [2024-12-02 10:17:17,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 10:17:17,800 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 10:17:17,801 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 10:17:17,801 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 10:17:17,804 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 10:17:17,804 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 10:17:17" (1/1) ... [2024-12-02 10:17:17,805 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6138b68d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:17:17, skipping insertion in model container [2024-12-02 10:17:17,805 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 10:17:17" (1/1) ... [2024-12-02 10:17:17,817 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 10:17:17,947 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_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/sv-benchmarks/c/nla-digbench/egcd2-ll.c[490,503] [2024-12-02 10:17:17,968 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 10:17:17,978 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 10:17:17,988 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_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/sv-benchmarks/c/nla-digbench/egcd2-ll.c[490,503] [2024-12-02 10:17:17,997 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 10:17:18,012 INFO L204 MainTranslator]: Completed translation [2024-12-02 10:17:18,012 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:17:18 WrapperNode [2024-12-02 10:17:18,013 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 10:17:18,014 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 10:17:18,014 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 10:17:18,014 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 10:17:18,021 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:17:18" (1/1) ... [2024-12-02 10:17:18,027 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:17:18" (1/1) ... [2024-12-02 10:17:18,042 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 75 [2024-12-02 10:17:18,043 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 10:17:18,043 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 10:17:18,043 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 10:17:18,043 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 10:17:18,052 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:17:18" (1/1) ... [2024-12-02 10:17:18,053 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:17:18" (1/1) ... [2024-12-02 10:17:18,054 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:17:18" (1/1) ... [2024-12-02 10:17:18,064 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-12-02 10:17:18,064 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:17:18" (1/1) ... [2024-12-02 10:17:18,064 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:17:18" (1/1) ... [2024-12-02 10:17:18,067 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:17:18" (1/1) ... [2024-12-02 10:17:18,068 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:17:18" (1/1) ... [2024-12-02 10:17:18,071 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:17:18" (1/1) ... [2024-12-02 10:17:18,073 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:17:18" (1/1) ... [2024-12-02 10:17:18,073 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:17:18" (1/1) ... [2024-12-02 10:17:18,075 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 10:17:18,076 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 10:17:18,076 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 10:17:18,076 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 10:17:18,077 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:17:18" (1/1) ... [2024-12-02 10:17:18,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 10:17:18,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:17:18,105 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 10:17:18,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 10:17:18,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 10:17:18,130 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-12-02 10:17:18,130 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-12-02 10:17:18,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 10:17:18,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 10:17:18,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 10:17:18,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-12-02 10:17:18,131 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-12-02 10:17:18,190 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 10:17:18,193 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 10:17:18,336 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live. [2024-12-02 10:17:18,336 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 10:17:18,343 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 10:17:18,344 INFO L312 CfgBuilder]: Removed 4 assume(true) statements. [2024-12-02 10:17:18,344 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:17:18 BoogieIcfgContainer [2024-12-02 10:17:18,344 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 10:17:18,346 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 10:17:18,346 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 10:17:18,349 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 10:17:18,349 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 10:17:17" (1/3) ... [2024-12-02 10:17:18,350 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@748144c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 10:17:18, skipping insertion in model container [2024-12-02 10:17:18,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 10:17:18" (2/3) ... [2024-12-02 10:17:18,350 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@748144c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 10:17:18, skipping insertion in model container [2024-12-02 10:17:18,350 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 10:17:18" (3/3) ... [2024-12-02 10:17:18,352 INFO L128 eAbstractionObserver]: Analyzing ICFG egcd2-ll.c [2024-12-02 10:17:18,363 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 10:17:18,364 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG egcd2-ll.c that has 3 procedures, 30 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-12-02 10:17:18,410 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 10:17:18,423 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;@19a755e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 10:17:18,423 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-12-02 10:17:18,427 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-12-02 10:17:18,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-12-02 10:17:18,435 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:17:18,435 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:17:18,436 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:17:18,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:17:18,442 INFO L85 PathProgramCache]: Analyzing trace with hash -598577897, now seen corresponding path program 1 times [2024-12-02 10:17:18,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:17:18,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673292969] [2024-12-02 10:17:18,450 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:17:18,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:17:18,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:17:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-12-02 10:17:18,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:17:18,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673292969] [2024-12-02 10:17:18,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673292969] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:17:18,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140710965] [2024-12-02 10:17:18,573 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:17:18,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:17:18,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:17:18,576 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:17:18,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 10:17:18,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:17:18,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 1 conjuncts are in the unsatisfiable core [2024-12-02 10:17:18,647 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:17:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-12-02 10:17:18,656 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:17:18,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140710965] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:17:18,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 10:17:18,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2024-12-02 10:17:18,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336437371] [2024-12-02 10:17:18,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:17:18,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-12-02 10:17:18,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:17:18,676 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-12-02 10:17:18,676 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-12-02 10:17:18,678 INFO L87 Difference]: Start difference. First operand has 30 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-12-02 10:17:18,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:17:18,695 INFO L93 Difference]: Finished difference Result 57 states and 96 transitions. [2024-12-02 10:17:18,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-12-02 10:17:18,697 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2024-12-02 10:17:18,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:17:18,702 INFO L225 Difference]: With dead ends: 57 [2024-12-02 10:17:18,702 INFO L226 Difference]: Without dead ends: 26 [2024-12-02 10:17:18,705 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-12-02 10:17:18,707 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:17:18,708 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:17:18,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-12-02 10:17:18,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-12-02 10:17:18,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-12-02 10:17:18,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2024-12-02 10:17:18,735 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 28 [2024-12-02 10:17:18,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:17:18,736 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2024-12-02 10:17:18,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-12-02 10:17:18,736 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2024-12-02 10:17:18,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-12-02 10:17:18,737 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:17:18,738 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:17:18,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 10:17:18,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-12-02 10:17:18,938 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:17:18,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:17:18,939 INFO L85 PathProgramCache]: Analyzing trace with hash 477279511, now seen corresponding path program 1 times [2024-12-02 10:17:18,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:17:18,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035479475] [2024-12-02 10:17:18,939 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:17:18,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:17:18,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:17:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 10:17:19,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:17:19,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035479475] [2024-12-02 10:17:19,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035479475] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:17:19,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224283666] [2024-12-02 10:17:19,165 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:17:19,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:17:19,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:17:19,167 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:17:19,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 10:17:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:17:19,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-12-02 10:17:19,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:17:19,364 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-12-02 10:17:19,364 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:17:19,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224283666] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:17:19,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 10:17:19,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-12-02 10:17:19,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63772684] [2024-12-02 10:17:19,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:17:19,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 10:17:19,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:17:19,366 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 10:17:19,366 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-12-02 10:17:19,366 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-12-02 10:17:19,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:17:19,475 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2024-12-02 10:17:19,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 10:17:19,476 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2024-12-02 10:17:19,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:17:19,477 INFO L225 Difference]: With dead ends: 41 [2024-12-02 10:17:19,477 INFO L226 Difference]: Without dead ends: 39 [2024-12-02 10:17:19,477 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-12-02 10:17:19,478 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:17:19,478 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 116 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 10:17:19,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-12-02 10:17:19,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2024-12-02 10:17:19,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-12-02 10:17:19,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2024-12-02 10:17:19,490 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 28 [2024-12-02 10:17:19,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:17:19,490 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2024-12-02 10:17:19,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-12-02 10:17:19,490 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2024-12-02 10:17:19,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-12-02 10:17:19,491 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:17:19,491 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:17:19,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 10:17:19,691 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-12-02 10:17:19,692 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:17:19,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:17:19,692 INFO L85 PathProgramCache]: Analyzing trace with hash 478888225, now seen corresponding path program 1 times [2024-12-02 10:17:19,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:17:19,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370158633] [2024-12-02 10:17:19,692 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:17:19,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:17:19,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-12-02 10:17:19,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20478244] [2024-12-02 10:17:19,712 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:17:19,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:17:19,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:17:19,715 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:17:19,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 10:17:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:17:19,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 10:17:19,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:17:19,796 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-12-02 10:17:19,797 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:17:19,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:17:19,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370158633] [2024-12-02 10:17:19,797 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-12-02 10:17:19,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20478244] [2024-12-02 10:17:19,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20478244] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:17:19,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:17:19,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 10:17:19,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074839197] [2024-12-02 10:17:19,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:17:19,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 10:17:19,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:17:19,799 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 10:17:19,799 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 10:17:19,799 INFO L87 Difference]: Start difference. First operand 37 states and 52 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-12-02 10:17:19,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:17:19,853 INFO L93 Difference]: Finished difference Result 54 states and 78 transitions. [2024-12-02 10:17:19,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 10:17:19,853 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2024-12-02 10:17:19,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:17:19,855 INFO L225 Difference]: With dead ends: 54 [2024-12-02 10:17:19,855 INFO L226 Difference]: Without dead ends: 52 [2024-12-02 10:17:19,855 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 10:17:19,856 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 4 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:17:19,856 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 115 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:17:19,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-12-02 10:17:19,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2024-12-02 10:17:19,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 25 states have internal predecessors, (26), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2024-12-02 10:17:19,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 59 transitions. [2024-12-02 10:17:19,864 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 59 transitions. Word has length 28 [2024-12-02 10:17:19,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:17:19,864 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 59 transitions. [2024-12-02 10:17:19,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-12-02 10:17:19,864 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 59 transitions. [2024-12-02 10:17:19,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-12-02 10:17:19,866 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:17:19,866 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:17:19,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 10:17:20,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:17:20,066 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:17:20,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:17:20,067 INFO L85 PathProgramCache]: Analyzing trace with hash -181393563, now seen corresponding path program 1 times [2024-12-02 10:17:20,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:17:20,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297472781] [2024-12-02 10:17:20,067 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:17:20,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:17:20,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:17:20,182 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 10:17:20,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:17:20,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297472781] [2024-12-02 10:17:20,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297472781] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:17:20,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918895341] [2024-12-02 10:17:20,183 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:17:20,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:17:20,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:17:20,185 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:17:20,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 10:17:20,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:17:20,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-12-02 10:17:20,239 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:17:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-12-02 10:17:20,324 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:17:20,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918895341] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:17:20,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 10:17:20,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-12-02 10:17:20,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4408100] [2024-12-02 10:17:20,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:17:20,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 10:17:20,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:17:20,326 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 10:17:20,326 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-12-02 10:17:20,326 INFO L87 Difference]: Start difference. First operand 43 states and 59 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-12-02 10:17:20,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:17:20,382 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2024-12-02 10:17:20,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 10:17:20,384 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2024-12-02 10:17:20,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:17:20,385 INFO L225 Difference]: With dead ends: 51 [2024-12-02 10:17:20,385 INFO L226 Difference]: Without dead ends: 47 [2024-12-02 10:17:20,386 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-12-02 10:17:20,386 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:17:20,387 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 118 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:17:20,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-12-02 10:17:20,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-12-02 10:17:20,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 27 states have internal predecessors, (28), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-12-02 10:17:20,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2024-12-02 10:17:20,398 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 33 [2024-12-02 10:17:20,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:17:20,398 INFO L471 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2024-12-02 10:17:20,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-12-02 10:17:20,398 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2024-12-02 10:17:20,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-12-02 10:17:20,399 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:17:20,399 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:17:20,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 10:17:20,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:17:20,600 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:17:20,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:17:20,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1854074395, now seen corresponding path program 1 times [2024-12-02 10:17:20,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:17:20,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091405823] [2024-12-02 10:17:20,601 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:17:20,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:17:20,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-12-02 10:17:20,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1542795719] [2024-12-02 10:17:20,624 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:17:20,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:17:20,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:17:20,626 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:17:20,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 10:17:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:17:20,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-12-02 10:17:20,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:17:20,835 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-12-02 10:17:20,835 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 10:17:20,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:17:20,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091405823] [2024-12-02 10:17:20,836 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-12-02 10:17:20,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542795719] [2024-12-02 10:17:20,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542795719] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:17:20,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:17:20,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 10:17:20,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750846256] [2024-12-02 10:17:20,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:17:20,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 10:17:20,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:17:20,837 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 10:17:20,838 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 10:17:20,838 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-12-02 10:17:20,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:17:20,919 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2024-12-02 10:17:20,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 10:17:20,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2024-12-02 10:17:20,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:17:20,921 INFO L225 Difference]: With dead ends: 53 [2024-12-02 10:17:20,921 INFO L226 Difference]: Without dead ends: 51 [2024-12-02 10:17:20,922 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 10:17:20,922 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:17:20,923 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 106 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 10:17:20,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-12-02 10:17:20,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2024-12-02 10:17:20,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 30 states have internal predecessors, (31), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-12-02 10:17:20,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2024-12-02 10:17:20,936 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 43 [2024-12-02 10:17:20,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:17:20,936 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2024-12-02 10:17:20,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-12-02 10:17:20,937 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2024-12-02 10:17:20,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-12-02 10:17:20,938 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:17:20,938 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:17:20,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-12-02 10:17:21,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:17:21,139 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:17:21,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:17:21,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1199530778, now seen corresponding path program 1 times [2024-12-02 10:17:21,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:17:21,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393662541] [2024-12-02 10:17:21,139 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:17:21,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:17:21,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-12-02 10:17:21,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [923697129] [2024-12-02 10:17:21,161 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:17:21,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:17:21,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:17:21,164 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:17:21,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 10:17:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:17:21,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-12-02 10:17:21,229 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:17:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-12-02 10:17:21,297 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:17:21,429 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-12-02 10:17:21,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:17:21,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393662541] [2024-12-02 10:17:21,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-12-02 10:17:21,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923697129] [2024-12-02 10:17:21,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923697129] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:17:21,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 10:17:21,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-12-02 10:17:21,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309216153] [2024-12-02 10:17:21,430 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 10:17:21,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 10:17:21,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:17:21,430 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 10:17:21,431 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-12-02 10:17:21,431 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 7 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-12-02 10:17:21,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:17:21,564 INFO L93 Difference]: Finished difference Result 76 states and 105 transitions. [2024-12-02 10:17:21,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 10:17:21,565 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2024-12-02 10:17:21,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:17:21,566 INFO L225 Difference]: With dead ends: 76 [2024-12-02 10:17:21,567 INFO L226 Difference]: Without dead ends: 74 [2024-12-02 10:17:21,567 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-12-02 10:17:21,568 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:17:21,568 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 177 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 10:17:21,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-12-02 10:17:21,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 48. [2024-12-02 10:17:21,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-12-02 10:17:21,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2024-12-02 10:17:21,586 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 49 [2024-12-02 10:17:21,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:17:21,587 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2024-12-02 10:17:21,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-12-02 10:17:21,587 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2024-12-02 10:17:21,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-12-02 10:17:21,588 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:17:21,588 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:17:21,598 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 10:17:21,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:17:21,789 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:17:21,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:17:21,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1173595815, now seen corresponding path program 1 times [2024-12-02 10:17:21,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:17:21,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383990132] [2024-12-02 10:17:21,790 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:17:21,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:17:21,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:17:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-12-02 10:17:21,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:17:21,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383990132] [2024-12-02 10:17:21,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383990132] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:17:21,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098596195] [2024-12-02 10:17:21,957 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:17:21,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:17:21,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:17:21,959 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:17:21,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 10:17:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:17:22,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-12-02 10:17:22,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:17:22,065 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-12-02 10:17:22,066 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:17:22,174 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-12-02 10:17:22,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098596195] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:17:22,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 10:17:22,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-12-02 10:17:22,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582162244] [2024-12-02 10:17:22,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 10:17:22,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 10:17:22,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:17:22,176 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 10:17:22,176 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-12-02 10:17:22,176 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2024-12-02 10:17:22,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:17:22,364 INFO L93 Difference]: Finished difference Result 88 states and 126 transitions. [2024-12-02 10:17:22,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 10:17:22,365 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 51 [2024-12-02 10:17:22,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:17:22,366 INFO L225 Difference]: With dead ends: 88 [2024-12-02 10:17:22,366 INFO L226 Difference]: Without dead ends: 80 [2024-12-02 10:17:22,367 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 97 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-12-02 10:17:22,367 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 23 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:17:22,368 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 222 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 10:17:22,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-12-02 10:17:22,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2024-12-02 10:17:22,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 30 states have call successors, (30), 6 states have call predecessors, (30), 6 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2024-12-02 10:17:22,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 103 transitions. [2024-12-02 10:17:22,392 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 103 transitions. Word has length 51 [2024-12-02 10:17:22,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:17:22,392 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 103 transitions. [2024-12-02 10:17:22,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2024-12-02 10:17:22,392 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 103 transitions. [2024-12-02 10:17:22,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-12-02 10:17:22,393 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:17:22,393 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:17:22,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 10:17:22,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:17:22,594 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:17:22,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:17:22,594 INFO L85 PathProgramCache]: Analyzing trace with hash -2137528423, now seen corresponding path program 1 times [2024-12-02 10:17:22,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:17:22,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499247196] [2024-12-02 10:17:22,594 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:17:22,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:17:22,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-12-02 10:17:22,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896441299] [2024-12-02 10:17:22,613 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:17:22,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:17:22,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:17:22,615 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:17:22,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 10:17:22,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:17:22,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-12-02 10:17:22,678 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:17:22,801 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-12-02 10:17:22,801 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:17:22,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:17:22,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499247196] [2024-12-02 10:17:22,843 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-12-02 10:17:22,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896441299] [2024-12-02 10:17:22,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896441299] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:17:22,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-12-02 10:17:22,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2024-12-02 10:17:22,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323395502] [2024-12-02 10:17:22,844 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-12-02 10:17:22,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 10:17:22,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:17:22,845 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 10:17:22,845 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-12-02 10:17:22,845 INFO L87 Difference]: Start difference. First operand 72 states and 103 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-12-02 10:17:22,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:17:22,961 INFO L93 Difference]: Finished difference Result 102 states and 149 transitions. [2024-12-02 10:17:22,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 10:17:22,961 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2024-12-02 10:17:22,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:17:22,963 INFO L225 Difference]: With dead ends: 102 [2024-12-02 10:17:22,963 INFO L226 Difference]: Without dead ends: 99 [2024-12-02 10:17:22,963 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-12-02 10:17:22,964 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 10:17:22,964 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 159 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 10:17:22,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-12-02 10:17:22,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2024-12-02 10:17:22,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 45 states have (on average 1.288888888888889) internal successors, (58), 47 states have internal predecessors, (58), 43 states have call successors, (43), 7 states have call predecessors, (43), 7 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2024-12-02 10:17:22,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 142 transitions. [2024-12-02 10:17:22,991 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 142 transitions. Word has length 56 [2024-12-02 10:17:22,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:17:22,992 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 142 transitions. [2024-12-02 10:17:22,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-12-02 10:17:22,992 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 142 transitions. [2024-12-02 10:17:22,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-12-02 10:17:22,993 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:17:22,993 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:17:23,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 10:17:23,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-12-02 10:17:23,193 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:17:23,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:17:23,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1879511325, now seen corresponding path program 2 times [2024-12-02 10:17:23,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:17:23,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289258473] [2024-12-02 10:17:23,194 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:17:23,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:17:23,215 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:17:23,215 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-12-02 10:17:23,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1019152947] [2024-12-02 10:17:23,216 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:17:23,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:17:23,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:17:23,218 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:17:23,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 10:17:23,279 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:17:23,279 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:17:23,281 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-12-02 10:17:23,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:17:23,624 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-12-02 10:17:23,624 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:17:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-12-02 10:17:23,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:17:23,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289258473] [2024-12-02 10:17:23,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-12-02 10:17:23,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019152947] [2024-12-02 10:17:23,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019152947] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:17:23,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 10:17:23,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 14 [2024-12-02 10:17:23,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487115821] [2024-12-02 10:17:23,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 10:17:23,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 10:17:23,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:17:23,780 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 10:17:23,780 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2024-12-02 10:17:23,780 INFO L87 Difference]: Start difference. First operand 96 states and 142 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2024-12-02 10:17:24,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:17:24,303 INFO L93 Difference]: Finished difference Result 104 states and 149 transitions. [2024-12-02 10:17:24,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-12-02 10:17:24,311 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) Word has length 61 [2024-12-02 10:17:24,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:17:24,312 INFO L225 Difference]: With dead ends: 104 [2024-12-02 10:17:24,313 INFO L226 Difference]: Without dead ends: 101 [2024-12-02 10:17:24,313 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2024-12-02 10:17:24,313 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 40 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 10:17:24,314 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 199 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 10:17:24,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-12-02 10:17:24,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2024-12-02 10:17:24,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 49 states have internal predecessors, (61), 41 states have call successors, (41), 8 states have call predecessors, (41), 8 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2024-12-02 10:17:24,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 142 transitions. [2024-12-02 10:17:24,342 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 142 transitions. Word has length 61 [2024-12-02 10:17:24,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:17:24,342 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 142 transitions. [2024-12-02 10:17:24,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2024-12-02 10:17:24,342 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 142 transitions. [2024-12-02 10:17:24,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-12-02 10:17:24,343 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:17:24,343 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:17:24,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 10:17:24,544 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:17:24,544 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:17:24,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:17:24,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1703411097, now seen corresponding path program 3 times [2024-12-02 10:17:24,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:17:24,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140196874] [2024-12-02 10:17:24,545 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:17:24,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:17:24,572 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-12-02 10:17:24,572 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-12-02 10:17:24,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1242467500] [2024-12-02 10:17:24,574 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:17:24,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:17:24,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:17:24,576 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:17:24,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 10:17:24,632 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 10:17:24,632 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:17:24,634 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-12-02 10:17:24,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:17:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 37 proven. 12 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-12-02 10:17:25,372 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:17:26,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:17:26,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140196874] [2024-12-02 10:17:26,218 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-12-02 10:17:26,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242467500] [2024-12-02 10:17:26,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242467500] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:17:26,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-12-02 10:17:26,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-12-02 10:17:26,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362352859] [2024-12-02 10:17:26,218 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-12-02 10:17:26,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-12-02 10:17:26,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:17:26,219 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-12-02 10:17:26,220 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2024-12-02 10:17:26,220 INFO L87 Difference]: Start difference. First operand 98 states and 142 transitions. Second operand has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 6 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2024-12-02 10:17:26,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:17:26,860 INFO L93 Difference]: Finished difference Result 114 states and 155 transitions. [2024-12-02 10:17:26,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-12-02 10:17:26,861 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 6 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 66 [2024-12-02 10:17:26,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:17:26,862 INFO L225 Difference]: With dead ends: 114 [2024-12-02 10:17:26,863 INFO L226 Difference]: Without dead ends: 112 [2024-12-02 10:17:26,863 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2024-12-02 10:17:26,864 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 26 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 10:17:26,864 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 209 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 10:17:26,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-12-02 10:17:26,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2024-12-02 10:17:26,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 58 states have internal predecessors, (70), 41 states have call successors, (41), 11 states have call predecessors, (41), 11 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2024-12-02 10:17:26,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 151 transitions. [2024-12-02 10:17:26,903 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 151 transitions. Word has length 66 [2024-12-02 10:17:26,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:17:26,903 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 151 transitions. [2024-12-02 10:17:26,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 6 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2024-12-02 10:17:26,903 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 151 transitions. [2024-12-02 10:17:26,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-12-02 10:17:26,905 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:17:26,905 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:17:26,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 10:17:27,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-12-02 10:17:27,105 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:17:27,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:17:27,106 INFO L85 PathProgramCache]: Analyzing trace with hash -846786752, now seen corresponding path program 1 times [2024-12-02 10:17:27,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:17:27,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861945998] [2024-12-02 10:17:27,106 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:17:27,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:17:27,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-12-02 10:17:27,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [704366474] [2024-12-02 10:17:27,124 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:17:27,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:17:27,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:17:27,126 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:17:27,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 10:17:27,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:17:27,184 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-12-02 10:17:27,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:17:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-12-02 10:17:27,617 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:17:27,946 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-12-02 10:17:27,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:17:27,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861945998] [2024-12-02 10:17:27,946 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-12-02 10:17:27,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704366474] [2024-12-02 10:17:27,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704366474] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:17:27,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 10:17:27,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-12-02 10:17:27,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092602625] [2024-12-02 10:17:27,947 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 10:17:27,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-12-02 10:17:27,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:17:27,948 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-12-02 10:17:27,948 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-12-02 10:17:27,948 INFO L87 Difference]: Start difference. First operand 110 states and 151 transitions. Second operand has 21 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-12-02 10:17:29,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:17:29,639 INFO L93 Difference]: Finished difference Result 196 states and 298 transitions. [2024-12-02 10:17:29,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-12-02 10:17:29,640 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 72 [2024-12-02 10:17:29,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:17:29,641 INFO L225 Difference]: With dead ends: 196 [2024-12-02 10:17:29,642 INFO L226 Difference]: Without dead ends: 188 [2024-12-02 10:17:29,642 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2024-12-02 10:17:29,642 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 58 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-12-02 10:17:29,643 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 322 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-12-02 10:17:29,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2024-12-02 10:17:29,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2024-12-02 10:17:29,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 83 states have (on average 1.3012048192771084) internal successors, (108), 84 states have internal predecessors, (108), 89 states have call successors, (89), 13 states have call predecessors, (89), 13 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2024-12-02 10:17:29,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 285 transitions. [2024-12-02 10:17:29,731 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 285 transitions. Word has length 72 [2024-12-02 10:17:29,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:17:29,732 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 285 transitions. [2024-12-02 10:17:29,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2024-12-02 10:17:29,732 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 285 transitions. [2024-12-02 10:17:29,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-12-02 10:17:29,733 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:17:29,733 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:17:29,742 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 10:17:29,933 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-12-02 10:17:29,933 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:17:29,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:17:29,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1531698386, now seen corresponding path program 1 times [2024-12-02 10:17:29,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:17:29,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041246534] [2024-12-02 10:17:29,934 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:17:29,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:17:29,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-12-02 10:17:29,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1813975097] [2024-12-02 10:17:29,953 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 10:17:29,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:17:29,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:17:29,955 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:17:29,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 10:17:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:17:30,025 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-12-02 10:17:30,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:17:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 68 proven. 31 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-12-02 10:17:30,942 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:17:31,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:17:31,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041246534] [2024-12-02 10:17:31,063 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-12-02 10:17:31,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813975097] [2024-12-02 10:17:31,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813975097] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:17:31,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-12-02 10:17:31,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-12-02 10:17:31,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187266870] [2024-12-02 10:17:31,063 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-12-02 10:17:31,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-12-02 10:17:31,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:17:31,064 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-12-02 10:17:31,064 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2024-12-02 10:17:31,064 INFO L87 Difference]: Start difference. First operand 186 states and 285 transitions. Second operand has 17 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2024-12-02 10:17:31,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:17:31,756 INFO L93 Difference]: Finished difference Result 198 states and 295 transitions. [2024-12-02 10:17:31,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-12-02 10:17:31,757 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 87 [2024-12-02 10:17:31,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:17:31,758 INFO L225 Difference]: With dead ends: 198 [2024-12-02 10:17:31,758 INFO L226 Difference]: Without dead ends: 196 [2024-12-02 10:17:31,758 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2024-12-02 10:17:31,758 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 23 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 10:17:31,759 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 182 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 10:17:31,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2024-12-02 10:17:31,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2024-12-02 10:17:31,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 89 states have (on average 1.2808988764044944) internal successors, (114), 90 states have internal predecessors, (114), 89 states have call successors, (89), 15 states have call predecessors, (89), 15 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2024-12-02 10:17:31,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 291 transitions. [2024-12-02 10:17:31,818 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 291 transitions. Word has length 87 [2024-12-02 10:17:31,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:17:31,818 INFO L471 AbstractCegarLoop]: Abstraction has 194 states and 291 transitions. [2024-12-02 10:17:31,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2024-12-02 10:17:31,818 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 291 transitions. [2024-12-02 10:17:31,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-12-02 10:17:31,819 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:17:31,819 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:17:31,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-02 10:17:32,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-12-02 10:17:32,020 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:17:32,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:17:32,020 INFO L85 PathProgramCache]: Analyzing trace with hash 2030461019, now seen corresponding path program 4 times [2024-12-02 10:17:32,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:17:32,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153424839] [2024-12-02 10:17:32,020 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:17:32,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:17:32,030 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:17:32,030 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:17:32,090 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-12-02 10:17:32,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:17:32,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153424839] [2024-12-02 10:17:32,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153424839] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 10:17:32,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 10:17:32,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 10:17:32,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182572220] [2024-12-02 10:17:32,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 10:17:32,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 10:17:32,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:17:32,091 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 10:17:32,091 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 10:17:32,091 INFO L87 Difference]: Start difference. First operand 194 states and 291 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-12-02 10:17:32,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:17:32,202 INFO L93 Difference]: Finished difference Result 237 states and 353 transitions. [2024-12-02 10:17:32,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 10:17:32,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 89 [2024-12-02 10:17:32,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:17:32,204 INFO L225 Difference]: With dead ends: 237 [2024-12-02 10:17:32,204 INFO L226 Difference]: Without dead ends: 177 [2024-12-02 10:17:32,204 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-12-02 10:17:32,205 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:17:32,205 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 129 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 10:17:32,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-12-02 10:17:32,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 148. [2024-12-02 10:17:32,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 70 states have (on average 1.2) internal successors, (84), 72 states have internal predecessors, (84), 64 states have call successors, (64), 13 states have call predecessors, (64), 13 states have return successors, (63), 62 states have call predecessors, (63), 63 states have call successors, (63) [2024-12-02 10:17:32,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 211 transitions. [2024-12-02 10:17:32,255 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 211 transitions. Word has length 89 [2024-12-02 10:17:32,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:17:32,256 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 211 transitions. [2024-12-02 10:17:32,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2024-12-02 10:17:32,256 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 211 transitions. [2024-12-02 10:17:32,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2024-12-02 10:17:32,258 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:17:32,258 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:17:32,258 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-12-02 10:17:32,258 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:17:32,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:17:32,259 INFO L85 PathProgramCache]: Analyzing trace with hash 515894073, now seen corresponding path program 2 times [2024-12-02 10:17:32,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:17:32,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162542386] [2024-12-02 10:17:32,259 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:17:32,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:17:32,285 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:17:32,285 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-12-02 10:17:32,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242128420] [2024-12-02 10:17:32,286 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:17:32,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:17:32,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:17:32,288 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:17:32,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-12-02 10:17:32,373 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:17:32,373 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:17:32,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-12-02 10:17:32,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:17:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 502 backedges. 71 proven. 29 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2024-12-02 10:17:33,559 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:17:33,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:17:33,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162542386] [2024-12-02 10:17:33,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-12-02 10:17:33,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242128420] [2024-12-02 10:17:33,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242128420] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:17:33,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-12-02 10:17:33,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-12-02 10:17:33,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329269437] [2024-12-02 10:17:33,916 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-12-02 10:17:33,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 10:17:33,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:17:33,916 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 10:17:33,916 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-12-02 10:17:33,916 INFO L87 Difference]: Start difference. First operand 148 states and 211 transitions. Second operand has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2024-12-02 10:17:34,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:17:34,885 INFO L93 Difference]: Finished difference Result 177 states and 252 transitions. [2024-12-02 10:17:34,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 10:17:34,885 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) Word has length 108 [2024-12-02 10:17:34,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:17:34,887 INFO L225 Difference]: With dead ends: 177 [2024-12-02 10:17:34,887 INFO L226 Difference]: Without dead ends: 175 [2024-12-02 10:17:34,887 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2024-12-02 10:17:34,888 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 22 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-12-02 10:17:34,888 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 317 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-12-02 10:17:34,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-12-02 10:17:34,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 148. [2024-12-02 10:17:34,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 70 states have (on average 1.2) internal successors, (84), 72 states have internal predecessors, (84), 64 states have call successors, (64), 13 states have call predecessors, (64), 13 states have return successors, (63), 62 states have call predecessors, (63), 63 states have call successors, (63) [2024-12-02 10:17:34,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 211 transitions. [2024-12-02 10:17:34,933 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 211 transitions. Word has length 108 [2024-12-02 10:17:34,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:17:34,933 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 211 transitions. [2024-12-02 10:17:34,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 7 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2024-12-02 10:17:34,934 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 211 transitions. [2024-12-02 10:17:34,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-12-02 10:17:34,935 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:17:34,935 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:17:34,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-12-02 10:17:35,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-12-02 10:17:35,136 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:17:35,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:17:35,136 INFO L85 PathProgramCache]: Analyzing trace with hash 626403152, now seen corresponding path program 3 times [2024-12-02 10:17:35,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:17:35,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501680204] [2024-12-02 10:17:35,136 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:17:35,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:17:35,184 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-12-02 10:17:35,185 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-12-02 10:17:35,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768675334] [2024-12-02 10:17:35,186 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:17:35,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:17:35,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:17:35,188 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:17:35,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-02 10:17:35,311 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 10:17:35,311 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:17:35,312 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-12-02 10:17:35,314 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:17:36,130 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 97 proven. 13 refuted. 0 times theorem prover too weak. 395 trivial. 0 not checked. [2024-12-02 10:17:36,130 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:17:36,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:17:36,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501680204] [2024-12-02 10:17:36,308 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-12-02 10:17:36,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768675334] [2024-12-02 10:17:36,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768675334] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:17:36,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-12-02 10:17:36,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-12-02 10:17:36,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814896852] [2024-12-02 10:17:36,308 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-12-02 10:17:36,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-12-02 10:17:36,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:17:36,309 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-12-02 10:17:36,309 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2024-12-02 10:17:36,309 INFO L87 Difference]: Start difference. First operand 148 states and 211 transitions. Second operand has 16 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2024-12-02 10:17:36,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:17:36,961 INFO L93 Difference]: Finished difference Result 185 states and 258 transitions. [2024-12-02 10:17:36,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-12-02 10:17:36,962 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 110 [2024-12-02 10:17:36,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:17:36,963 INFO L225 Difference]: With dead ends: 185 [2024-12-02 10:17:36,963 INFO L226 Difference]: Without dead ends: 181 [2024-12-02 10:17:36,963 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2024-12-02 10:17:36,964 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 14 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 10:17:36,964 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 169 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 10:17:36,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-12-02 10:17:37,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 154. [2024-12-02 10:17:37,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 76 states have internal predecessors, (88), 64 states have call successors, (64), 15 states have call predecessors, (64), 14 states have return successors, (63), 62 states have call predecessors, (63), 63 states have call successors, (63) [2024-12-02 10:17:37,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 215 transitions. [2024-12-02 10:17:37,012 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 215 transitions. Word has length 110 [2024-12-02 10:17:37,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:17:37,012 INFO L471 AbstractCegarLoop]: Abstraction has 154 states and 215 transitions. [2024-12-02 10:17:37,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2024-12-02 10:17:37,012 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 215 transitions. [2024-12-02 10:17:37,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-12-02 10:17:37,013 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:17:37,013 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:17:37,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-12-02 10:17:37,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-12-02 10:17:37,213 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:17:37,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:17:37,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1427713097, now seen corresponding path program 2 times [2024-12-02 10:17:37,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:17:37,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242535215] [2024-12-02 10:17:37,214 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:17:37,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:17:37,231 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:17:37,232 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-12-02 10:17:37,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1346080651] [2024-12-02 10:17:37,233 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:17:37,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:17:37,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:17:37,235 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:17:37,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-12-02 10:17:37,320 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:17:37,320 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:17:37,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-12-02 10:17:37,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:17:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 73 proven. 38 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2024-12-02 10:17:38,187 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:17:39,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:17:39,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242535215] [2024-12-02 10:17:39,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-12-02 10:17:39,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346080651] [2024-12-02 10:17:39,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346080651] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:17:39,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-12-02 10:17:39,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-12-02 10:17:39,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229736526] [2024-12-02 10:17:39,505 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-12-02 10:17:39,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-12-02 10:17:39,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:17:39,506 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-12-02 10:17:39,506 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2024-12-02 10:17:39,506 INFO L87 Difference]: Start difference. First operand 154 states and 215 transitions. Second operand has 17 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2024-12-02 10:17:40,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:17:40,336 INFO L93 Difference]: Finished difference Result 210 states and 302 transitions. [2024-12-02 10:17:40,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-12-02 10:17:40,336 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 116 [2024-12-02 10:17:40,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:17:40,338 INFO L225 Difference]: With dead ends: 210 [2024-12-02 10:17:40,338 INFO L226 Difference]: Without dead ends: 205 [2024-12-02 10:17:40,338 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 160 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2024-12-02 10:17:40,339 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 21 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 10:17:40,339 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 511 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 10:17:40,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-12-02 10:17:40,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 184. [2024-12-02 10:17:40,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 88 states have internal predecessors, (103), 80 states have call successors, (80), 17 states have call predecessors, (80), 16 states have return successors, (79), 78 states have call predecessors, (79), 79 states have call successors, (79) [2024-12-02 10:17:40,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 262 transitions. [2024-12-02 10:17:40,432 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 262 transitions. Word has length 116 [2024-12-02 10:17:40,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:17:40,432 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 262 transitions. [2024-12-02 10:17:40,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2024-12-02 10:17:40,433 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 262 transitions. [2024-12-02 10:17:40,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-12-02 10:17:40,434 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:17:40,434 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:17:40,441 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-12-02 10:17:40,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-12-02 10:17:40,635 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:17:40,635 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:17:40,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1127518695, now seen corresponding path program 3 times [2024-12-02 10:17:40,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:17:40,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963630640] [2024-12-02 10:17:40,635 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:17:40,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:17:40,663 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-12-02 10:17:40,663 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-12-02 10:17:40,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377216754] [2024-12-02 10:17:40,664 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:17:40,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:17:40,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:17:40,668 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:17:40,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-12-02 10:17:40,722 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-12-02 10:17:40,722 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:17:40,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-12-02 10:17:40,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:17:41,309 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 87 proven. 36 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2024-12-02 10:17:41,310 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:17:41,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:17:41,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963630640] [2024-12-02 10:17:41,524 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-12-02 10:17:41,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377216754] [2024-12-02 10:17:41,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377216754] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:17:41,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-12-02 10:17:41,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-12-02 10:17:41,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580548365] [2024-12-02 10:17:41,525 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-12-02 10:17:41,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-12-02 10:17:41,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:17:41,526 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-12-02 10:17:41,526 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-12-02 10:17:41,526 INFO L87 Difference]: Start difference. First operand 184 states and 262 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2024-12-02 10:17:41,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:17:41,875 INFO L93 Difference]: Finished difference Result 203 states and 277 transitions. [2024-12-02 10:17:41,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 10:17:41,876 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) Word has length 135 [2024-12-02 10:17:41,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:17:41,877 INFO L225 Difference]: With dead ends: 203 [2024-12-02 10:17:41,877 INFO L226 Difference]: Without dead ends: 198 [2024-12-02 10:17:41,877 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2024-12-02 10:17:41,877 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 10:17:41,878 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 116 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 10:17:41,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-12-02 10:17:41,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 189. [2024-12-02 10:17:41,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 93 states have (on average 1.1505376344086022) internal successors, (107), 94 states have internal predecessors, (107), 76 states have call successors, (76), 20 states have call predecessors, (76), 19 states have return successors, (75), 74 states have call predecessors, (75), 75 states have call successors, (75) [2024-12-02 10:17:41,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 258 transitions. [2024-12-02 10:17:41,959 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 258 transitions. Word has length 135 [2024-12-02 10:17:41,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:17:41,959 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 258 transitions. [2024-12-02 10:17:41,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 4 states have call successors, (12) [2024-12-02 10:17:41,959 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 258 transitions. [2024-12-02 10:17:41,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-12-02 10:17:41,961 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:17:41,961 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:17:41,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-12-02 10:17:42,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-12-02 10:17:42,161 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:17:42,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:17:42,162 INFO L85 PathProgramCache]: Analyzing trace with hash -386442334, now seen corresponding path program 4 times [2024-12-02 10:17:42,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:17:42,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747249031] [2024-12-02 10:17:42,162 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:17:42,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:17:42,185 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:17:42,185 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-12-02 10:17:42,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [419223948] [2024-12-02 10:17:42,187 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 10:17:42,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:17:42,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:17:42,190 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:17:42,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-12-02 10:17:42,273 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 10:17:42,273 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:17:42,275 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-12-02 10:17:42,278 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:17:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 57 proven. 103 refuted. 0 times theorem prover too weak. 718 trivial. 0 not checked. [2024-12-02 10:17:43,158 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:17:44,215 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 57 proven. 94 refuted. 0 times theorem prover too weak. 727 trivial. 0 not checked. [2024-12-02 10:17:44,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:17:44,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747249031] [2024-12-02 10:17:44,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-12-02 10:17:44,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419223948] [2024-12-02 10:17:44,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419223948] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:17:44,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 10:17:44,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2024-12-02 10:17:44,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729281637] [2024-12-02 10:17:44,215 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 10:17:44,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-12-02 10:17:44,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:17:44,216 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-12-02 10:17:44,216 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2024-12-02 10:17:44,217 INFO L87 Difference]: Start difference. First operand 189 states and 258 transitions. Second operand has 32 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 17 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (48), 15 states have call predecessors, (48), 15 states have call successors, (48) [2024-12-02 10:17:51,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-12-02 10:17:53,885 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-12-02 10:17:58,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:17:58,750 INFO L93 Difference]: Finished difference Result 287 states and 412 transitions. [2024-12-02 10:17:58,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-12-02 10:17:58,751 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 17 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (48), 15 states have call predecessors, (48), 15 states have call successors, (48) Word has length 137 [2024-12-02 10:17:58,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:17:58,754 INFO L225 Difference]: With dead ends: 287 [2024-12-02 10:17:58,754 INFO L226 Difference]: Without dead ends: 281 [2024-12-02 10:17:58,755 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=729, Invalid=3303, Unknown=0, NotChecked=0, Total=4032 [2024-12-02 10:17:58,756 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 91 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 229 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 1667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2024-12-02 10:17:58,756 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 712 Invalid, 1667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 1437 Invalid, 1 Unknown, 0 Unchecked, 10.3s Time] [2024-12-02 10:17:58,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2024-12-02 10:17:58,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 245. [2024-12-02 10:17:58,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 114 states have (on average 1.1842105263157894) internal successors, (135), 116 states have internal predecessors, (135), 107 states have call successors, (107), 24 states have call predecessors, (107), 23 states have return successors, (106), 104 states have call predecessors, (106), 106 states have call successors, (106) [2024-12-02 10:17:58,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 348 transitions. [2024-12-02 10:17:58,908 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 348 transitions. Word has length 137 [2024-12-02 10:17:58,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:17:58,909 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 348 transitions. [2024-12-02 10:17:58,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 17 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (48), 15 states have call predecessors, (48), 15 states have call successors, (48) [2024-12-02 10:17:58,909 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 348 transitions. [2024-12-02 10:17:58,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-12-02 10:17:58,910 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:17:58,910 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:17:58,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-12-02 10:17:59,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-12-02 10:17:59,110 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:17:59,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:17:59,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1120834224, now seen corresponding path program 5 times [2024-12-02 10:17:59,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:17:59,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190141116] [2024-12-02 10:17:59,111 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 10:17:59,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:17:59,143 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-12-02 10:17:59,143 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-12-02 10:17:59,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603117651] [2024-12-02 10:17:59,144 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 10:17:59,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:17:59,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:17:59,146 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:17:59,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-12-02 10:17:59,285 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-12-02 10:17:59,285 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:17:59,287 INFO L256 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-12-02 10:17:59,289 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:18:00,157 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 77 proven. 125 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2024-12-02 10:18:00,157 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:18:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 77 proven. 125 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2024-12-02 10:18:01,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:18:01,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190141116] [2024-12-02 10:18:01,890 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-12-02 10:18:01,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603117651] [2024-12-02 10:18:01,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603117651] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 10:18:01,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 10:18:01,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2024-12-02 10:18:01,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107683072] [2024-12-02 10:18:01,891 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 10:18:01,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-12-02 10:18:01,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:18:01,891 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-12-02 10:18:01,892 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2024-12-02 10:18:01,892 INFO L87 Difference]: Start difference. First operand 245 states and 348 transitions. Second operand has 31 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 27 states have internal predecessors, (40), 18 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (46), 14 states have call predecessors, (46), 16 states have call successors, (46) [2024-12-02 10:18:07,362 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-12-02 10:18:14,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-12-02 10:18:16,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-12-02 10:18:17,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-12-02 10:18:20,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:18:20,892 INFO L93 Difference]: Finished difference Result 338 states and 487 transitions. [2024-12-02 10:18:20,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-12-02 10:18:20,893 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 27 states have internal predecessors, (40), 18 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (46), 14 states have call predecessors, (46), 16 states have call successors, (46) Word has length 137 [2024-12-02 10:18:20,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:18:20,894 INFO L225 Difference]: With dead ends: 338 [2024-12-02 10:18:20,894 INFO L226 Difference]: Without dead ends: 332 [2024-12-02 10:18:20,895 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=825, Invalid=3335, Unknown=0, NotChecked=0, Total=4160 [2024-12-02 10:18:20,895 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 68 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2024-12-02 10:18:20,895 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 565 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2024-12-02 10:18:20,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2024-12-02 10:18:21,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 274. [2024-12-02 10:18:21,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 127 states have (on average 1.188976377952756) internal successors, (151), 128 states have internal predecessors, (151), 120 states have call successors, (120), 27 states have call predecessors, (120), 26 states have return successors, (119), 118 states have call predecessors, (119), 119 states have call successors, (119) [2024-12-02 10:18:21,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 390 transitions. [2024-12-02 10:18:21,155 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 390 transitions. Word has length 137 [2024-12-02 10:18:21,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:18:21,155 INFO L471 AbstractCegarLoop]: Abstraction has 274 states and 390 transitions. [2024-12-02 10:18:21,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 27 states have internal predecessors, (40), 18 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (46), 14 states have call predecessors, (46), 16 states have call successors, (46) [2024-12-02 10:18:21,155 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 390 transitions. [2024-12-02 10:18:21,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2024-12-02 10:18:21,157 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:18:21,158 INFO L218 NwaCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 6, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:18:21,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-12-02 10:18:21,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:18:21,358 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:18:21,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:18:21,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1602732599, now seen corresponding path program 6 times [2024-12-02 10:18:21,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:18:21,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303211892] [2024-12-02 10:18:21,359 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 10:18:21,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:18:21,413 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2024-12-02 10:18:21,413 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-12-02 10:18:21,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272999751] [2024-12-02 10:18:21,415 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 10:18:21,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:18:21,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:18:21,417 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:18:21,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-12-02 10:18:21,555 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-12-02 10:18:21,555 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:18:21,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-12-02 10:18:21,561 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:18:22,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2216 backedges. 342 proven. 164 refuted. 0 times theorem prover too weak. 1710 trivial. 0 not checked. [2024-12-02 10:18:22,816 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:18:23,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:18:23,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303211892] [2024-12-02 10:18:23,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-12-02 10:18:23,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272999751] [2024-12-02 10:18:23,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272999751] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:18:23,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-12-02 10:18:23,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-12-02 10:18:23,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069227025] [2024-12-02 10:18:23,172 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-12-02 10:18:23,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-12-02 10:18:23,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:18:23,173 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-12-02 10:18:23,173 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-12-02 10:18:23,173 INFO L87 Difference]: Start difference. First operand 274 states and 390 transitions. Second operand has 21 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 12 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 9 states have call predecessors, (20), 11 states have call successors, (20) [2024-12-02 10:18:27,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-12-02 10:18:36,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:18:36,259 INFO L93 Difference]: Finished difference Result 332 states and 466 transitions. [2024-12-02 10:18:36,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-12-02 10:18:36,260 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 12 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 9 states have call predecessors, (20), 11 states have call successors, (20) Word has length 200 [2024-12-02 10:18:36,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:18:36,261 INFO L225 Difference]: With dead ends: 332 [2024-12-02 10:18:36,262 INFO L226 Difference]: Without dead ends: 190 [2024-12-02 10:18:36,262 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=221, Invalid=1039, Unknown=0, NotChecked=0, Total=1260 [2024-12-02 10:18:36,262 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 24 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 37 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2024-12-02 10:18:36,263 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 200 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 559 Invalid, 1 Unknown, 0 Unchecked, 9.9s Time] [2024-12-02 10:18:36,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-12-02 10:18:36,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2024-12-02 10:18:36,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 96 states have (on average 1.1354166666666667) internal successors, (109), 97 states have internal predecessors, (109), 72 states have call successors, (72), 22 states have call predecessors, (72), 21 states have return successors, (71), 70 states have call predecessors, (71), 71 states have call successors, (71) [2024-12-02 10:18:36,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 252 transitions. [2024-12-02 10:18:36,520 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 252 transitions. Word has length 200 [2024-12-02 10:18:36,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:18:36,521 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 252 transitions. [2024-12-02 10:18:36,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 12 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 9 states have call predecessors, (20), 11 states have call successors, (20) [2024-12-02 10:18:36,521 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 252 transitions. [2024-12-02 10:18:36,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2024-12-02 10:18:36,522 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:18:36,523 INFO L218 NwaCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:18:36,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-12-02 10:18:36,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:18:36,723 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:18:36,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:18:36,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1697729998, now seen corresponding path program 7 times [2024-12-02 10:18:36,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:18:36,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398881978] [2024-12-02 10:18:36,724 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 10:18:36,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:18:36,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-12-02 10:18:36,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1276375640] [2024-12-02 10:18:36,749 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 10:18:36,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:18:36,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:18:36,751 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:18:36,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-12-02 10:18:36,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 10:18:36,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-12-02 10:18:36,899 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:18:42,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2221 backedges. 179 proven. 223 refuted. 0 times theorem prover too weak. 1819 trivial. 0 not checked. [2024-12-02 10:18:42,920 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:18:43,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:18:43,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398881978] [2024-12-02 10:18:43,496 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-12-02 10:18:43,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276375640] [2024-12-02 10:18:43,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276375640] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:18:43,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-12-02 10:18:43,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-12-02 10:18:43,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442953368] [2024-12-02 10:18:43,496 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-12-02 10:18:43,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-12-02 10:18:43,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:18:43,497 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-12-02 10:18:43,497 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2024-12-02 10:18:43,497 INFO L87 Difference]: Start difference. First operand 190 states and 252 transitions. Second operand has 25 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 14 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 12 states have call predecessors, (36), 13 states have call successors, (36) [2024-12-02 10:18:50,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-12-02 10:18:55,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-12-02 10:18:59,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-12-02 10:19:04,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-12-02 10:19:07,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-12-02 10:19:11,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-12-02 10:19:12,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:19:12,920 INFO L93 Difference]: Finished difference Result 270 states and 383 transitions. [2024-12-02 10:19:12,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-12-02 10:19:12,921 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 14 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 12 states have call predecessors, (36), 13 states have call successors, (36) Word has length 202 [2024-12-02 10:19:12,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:19:12,922 INFO L225 Difference]: With dead ends: 270 [2024-12-02 10:19:12,922 INFO L226 Difference]: Without dead ends: 265 [2024-12-02 10:19:12,923 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2024-12-02 10:19:12,923 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 42 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 1635 mSolverCounterSat, 44 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 1683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1635 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.5s IncrementalHoareTripleChecker+Time [2024-12-02 10:19:12,923 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 935 Invalid, 1683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1635 Invalid, 4 Unknown, 0 Unchecked, 27.5s Time] [2024-12-02 10:19:12,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-12-02 10:19:13,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 230. [2024-12-02 10:19:13,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 110 states have (on average 1.1636363636363636) internal successors, (128), 111 states have internal predecessors, (128), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (95), 94 states have call predecessors, (95), 95 states have call successors, (95) [2024-12-02 10:19:13,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 319 transitions. [2024-12-02 10:19:13,147 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 319 transitions. Word has length 202 [2024-12-02 10:19:13,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:19:13,147 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 319 transitions. [2024-12-02 10:19:13,147 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.5) internal successors, (33), 23 states have internal predecessors, (33), 14 states have call successors, (37), 2 states have call predecessors, (37), 3 states have return successors, (36), 12 states have call predecessors, (36), 13 states have call successors, (36) [2024-12-02 10:19:13,147 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 319 transitions. [2024-12-02 10:19:13,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2024-12-02 10:19:13,148 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:19:13,148 INFO L218 NwaCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 6, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:19:13,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-12-02 10:19:13,348 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:19:13,349 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:19:13,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:19:13,349 INFO L85 PathProgramCache]: Analyzing trace with hash 836822507, now seen corresponding path program 8 times [2024-12-02 10:19:13,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:19:13,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973312606] [2024-12-02 10:19:13,349 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:19:13,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:19:13,374 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:19:13,374 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-12-02 10:19:13,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [231580229] [2024-12-02 10:19:13,375 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 10:19:13,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:19:13,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:19:13,377 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:19:13,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-12-02 10:19:13,506 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 10:19:13,506 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:19:13,509 INFO L256 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-12-02 10:19:13,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:19:19,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 190 proven. 284 refuted. 0 times theorem prover too weak. 2331 trivial. 0 not checked. [2024-12-02 10:19:19,088 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:19:19,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:19:19,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973312606] [2024-12-02 10:19:19,987 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-12-02 10:19:19,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231580229] [2024-12-02 10:19:19,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231580229] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:19:19,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-12-02 10:19:19,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-12-02 10:19:19,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072094913] [2024-12-02 10:19:19,987 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-12-02 10:19:19,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-12-02 10:19:19,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:19:19,988 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-12-02 10:19:19,988 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2024-12-02 10:19:19,988 INFO L87 Difference]: Start difference. First operand 230 states and 319 transitions. Second operand has 26 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 14 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (40), 14 states have call predecessors, (40), 13 states have call successors, (40) [2024-12-02 10:19:27,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-12-02 10:19:33,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.76s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-12-02 10:19:39,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:19:39,283 INFO L93 Difference]: Finished difference Result 333 states and 480 transitions. [2024-12-02 10:19:39,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-12-02 10:19:39,284 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 14 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (40), 14 states have call predecessors, (40), 13 states have call successors, (40) Word has length 223 [2024-12-02 10:19:39,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:19:39,286 INFO L225 Difference]: With dead ends: 333 [2024-12-02 10:19:39,287 INFO L226 Difference]: Without dead ends: 328 [2024-12-02 10:19:39,287 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=209, Invalid=1683, Unknown=0, NotChecked=0, Total=1892 [2024-12-02 10:19:39,289 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 43 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 1754 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1054 SdHoareTripleChecker+Invalid, 1823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2024-12-02 10:19:39,289 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1054 Invalid, 1823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1754 Invalid, 0 Unknown, 0 Unchecked, 16.4s Time] [2024-12-02 10:19:39,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2024-12-02 10:19:39,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 319. [2024-12-02 10:19:39,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 142 states have (on average 1.204225352112676) internal successors, (171), 143 states have internal predecessors, (171), 148 states have call successors, (148), 29 states have call predecessors, (148), 28 states have return successors, (147), 146 states have call predecessors, (147), 147 states have call successors, (147) [2024-12-02 10:19:39,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 466 transitions. [2024-12-02 10:19:39,691 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 466 transitions. Word has length 223 [2024-12-02 10:19:39,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:19:39,692 INFO L471 AbstractCegarLoop]: Abstraction has 319 states and 466 transitions. [2024-12-02 10:19:39,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 14 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (40), 14 states have call predecessors, (40), 13 states have call successors, (40) [2024-12-02 10:19:39,692 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 466 transitions. [2024-12-02 10:19:39,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2024-12-02 10:19:39,693 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 10:19:39,693 INFO L218 NwaCegarLoop]: trace histogram [37, 36, 36, 9, 9, 9, 9, 9, 9, 9, 9, 6, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:19:39,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-12-02 10:19:39,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:19:39,894 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-02 10:19:39,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 10:19:39,894 INFO L85 PathProgramCache]: Analyzing trace with hash -413701255, now seen corresponding path program 9 times [2024-12-02 10:19:39,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 10:19:39,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256821475] [2024-12-02 10:19:39,894 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:19:39,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 10:19:39,953 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2024-12-02 10:19:39,953 INFO L230 tOrderPrioritization]: Conjunction of SSA is unknown [2024-12-02 10:19:39,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [670785439] [2024-12-02 10:19:39,955 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 10:19:39,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:19:39,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 10:19:39,957 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 10:19:39,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-12-02 10:19:40,127 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-12-02 10:19:40,127 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 10:19:40,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-12-02 10:19:40,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 10:19:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 402 proven. 24 refuted. 0 times theorem prover too weak. 2379 trivial. 0 not checked. [2024-12-02 10:19:40,746 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 10:19:45,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 10:19:45,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256821475] [2024-12-02 10:19:45,036 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-12-02 10:19:45,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670785439] [2024-12-02 10:19:45,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670785439] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 10:19:45,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-12-02 10:19:45,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-12-02 10:19:45,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072980470] [2024-12-02 10:19:45,037 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-12-02 10:19:45,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-12-02 10:19:45,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 10:19:45,038 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-12-02 10:19:45,038 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=429, Unknown=1, NotChecked=0, Total=506 [2024-12-02 10:19:45,038 INFO L87 Difference]: Start difference. First operand 319 states and 466 transitions. Second operand has 17 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 8 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2024-12-02 10:19:48,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-12-02 10:19:49,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-12-02 10:19:50,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 10:19:50,468 INFO L93 Difference]: Finished difference Result 363 states and 499 transitions. [2024-12-02 10:19:50,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-12-02 10:19:50,469 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 8 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) Word has length 223 [2024-12-02 10:19:50,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 10:19:50,470 INFO L225 Difference]: With dead ends: 363 [2024-12-02 10:19:50,470 INFO L226 Difference]: Without dead ends: 0 [2024-12-02 10:19:50,470 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=170, Invalid=759, Unknown=1, NotChecked=0, Total=930 [2024-12-02 10:19:50,471 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 13 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-12-02 10:19:50,471 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 236 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-12-02 10:19:50,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-12-02 10:19:50,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-12-02 10:19:50,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 10:19:50,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-12-02 10:19:50,471 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 223 [2024-12-02 10:19:50,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 10:19:50,472 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-12-02 10:19:50,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 8 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2024-12-02 10:19:50,472 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-12-02 10:19:50,472 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-12-02 10:19:50,474 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-12-02 10:19:50,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-12-02 10:19:50,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bba443aa-579b-49dd-8bc0-f6c510bfe0f6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 10:19:50,677 INFO L422 BasicCegarLoop]: Path program histogram: [9, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 10:19:50,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-12-02 10:19:57,893 WARN L286 SmtUtils]: Spent 7.21s on a formula simplification. DAG size of input: 609 DAG size of output: 1210 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-12-02 10:20:05,203 WARN L286 SmtUtils]: Spent 7.30s on a formula simplification. DAG size of input: 611 DAG size of output: 1209 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-12-02 10:20:13,828 WARN L286 SmtUtils]: Spent 7.11s on a formula simplification. DAG size of input: 609 DAG size of output: 1222 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-12-02 10:20:22,336 WARN L286 SmtUtils]: Spent 8.50s on a formula simplification. DAG size of input: 604 DAG size of output: 1467 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or) [2024-12-02 10:25:26,443 WARN L286 SmtUtils]: Spent 5.07m on a formula simplification. DAG size of input: 1210 DAG size of output: 63 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-12-02 10:29:13,980 WARN L286 SmtUtils]: Spent 3.79m on a formula simplification. DAG size of input: 1209 DAG size of output: 55 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-12-02 10:30:13,151 WARN L286 SmtUtils]: Spent 58.92s on a formula simplification. DAG size of input: 531 DAG size of output: 40 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter)