./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/float-benchs/feedback_diverge.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_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/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_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerReach.xml -i ../../sv-benchmarks/c/float-benchs/feedback_diverge.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/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_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/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 a6e296367f1fe3cf145b6868ec70c2d770b2281a31a9d7dcae84843c6ed48125 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-01 13:14:41,337 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-01 13:14:41,391 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-12-01 13:14:41,396 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-01 13:14:41,396 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-01 13:14:41,417 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-01 13:14:41,418 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-01 13:14:41,418 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-01 13:14:41,418 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-01 13:14:41,418 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-01 13:14:41,418 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-01 13:14:41,419 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-01 13:14:41,419 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-01 13:14:41,419 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-01 13:14:41,419 INFO L153 SettingsManager]: * Use SBE=true [2024-12-01 13:14:41,419 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-01 13:14:41,419 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-12-01 13:14:41,419 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-01 13:14:41,419 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-01 13:14:41,420 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-01 13:14:41,420 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-01 13:14:41,420 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-12-01 13:14:41,420 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-01 13:14:41,420 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-12-01 13:14:41,420 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-01 13:14:41,420 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-12-01 13:14:41,420 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-01 13:14:41,420 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-01 13:14:41,420 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-01 13:14:41,420 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-01 13:14:41,420 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-01 13:14:41,420 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-01 13:14:41,421 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-01 13:14:41,421 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-01 13:14:41,421 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-01 13:14:41,421 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-01 13:14:41,421 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-01 13:14:41,421 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-01 13:14:41,421 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-01 13:14:41,421 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-01 13:14:41,421 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-12-01 13:14:41,421 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-12-01 13:14:41,421 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-01 13:14:41,421 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-01 13:14:41,422 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-01 13:14:41,422 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-01 13:14:41,422 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-01 13:14:41,422 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-01 13:14:41,422 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_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/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 -> a6e296367f1fe3cf145b6868ec70c2d770b2281a31a9d7dcae84843c6ed48125 [2024-12-01 13:14:41,644 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-01 13:14:41,652 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-01 13:14:41,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-01 13:14:41,656 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-01 13:14:41,657 INFO L274 PluginConnector]: CDTParser initialized [2024-12-01 13:14:41,658 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/float-benchs/feedback_diverge.c [2024-12-01 13:14:44,298 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/data/aa441d658/c24402a5b72041bb83ebd032f723db64/FLAG418db2035 [2024-12-01 13:14:44,495 INFO L384 CDTParser]: Found 1 translation units. [2024-12-01 13:14:44,495 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/sv-benchmarks/c/float-benchs/feedback_diverge.c [2024-12-01 13:14:44,502 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/data/aa441d658/c24402a5b72041bb83ebd032f723db64/FLAG418db2035 [2024-12-01 13:14:44,887 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/data/aa441d658/c24402a5b72041bb83ebd032f723db64 [2024-12-01 13:14:44,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-01 13:14:44,889 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-01 13:14:44,890 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-01 13:14:44,890 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-01 13:14:44,893 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-01 13:14:44,894 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 01:14:44" (1/1) ... [2024-12-01 13:14:44,894 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2205a1af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:14:44, skipping insertion in model container [2024-12-01 13:14:44,894 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 01:14:44" (1/1) ... [2024-12-01 13:14:44,903 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-01 13:14:45,005 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_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/sv-benchmarks/c/float-benchs/feedback_diverge.c[626,639] [2024-12-01 13:14:45,021 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-01 13:14:45,030 INFO L200 MainTranslator]: Completed pre-run [2024-12-01 13:14:45,040 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_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/sv-benchmarks/c/float-benchs/feedback_diverge.c[626,639] [2024-12-01 13:14:45,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-01 13:14:45,057 INFO L204 MainTranslator]: Completed translation [2024-12-01 13:14:45,058 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:14:45 WrapperNode [2024-12-01 13:14:45,058 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-01 13:14:45,059 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-01 13:14:45,059 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-01 13:14:45,059 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-01 13:14:45,066 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:14:45" (1/1) ... [2024-12-01 13:14:45,072 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:14:45" (1/1) ... [2024-12-01 13:14:45,085 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 47 [2024-12-01 13:14:45,085 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-01 13:14:45,086 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-01 13:14:45,086 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-01 13:14:45,086 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-01 13:14:45,094 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:14:45" (1/1) ... [2024-12-01 13:14:45,094 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:14:45" (1/1) ... [2024-12-01 13:14:45,095 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:14:45" (1/1) ... [2024-12-01 13:14:45,105 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]. [2024-12-01 13:14:45,105 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:14:45" (1/1) ... [2024-12-01 13:14:45,105 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:14:45" (1/1) ... [2024-12-01 13:14:45,108 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:14:45" (1/1) ... [2024-12-01 13:14:45,109 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:14:45" (1/1) ... [2024-12-01 13:14:45,112 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:14:45" (1/1) ... [2024-12-01 13:14:45,113 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:14:45" (1/1) ... [2024-12-01 13:14:45,114 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:14:45" (1/1) ... [2024-12-01 13:14:45,115 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-01 13:14:45,115 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-01 13:14:45,116 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-01 13:14:45,116 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-01 13:14:45,116 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:14:45" (1/1) ... [2024-12-01 13:14:45,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-01 13:14:45,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:14:45,141 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-01 13:14:45,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-01 13:14:45,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-01 13:14:45,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-01 13:14:45,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-01 13:14:45,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-01 13:14:45,221 INFO L234 CfgBuilder]: Building ICFG [2024-12-01 13:14:45,223 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-01 13:14:45,314 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-12-01 13:14:45,314 INFO L283 CfgBuilder]: Performing block encoding [2024-12-01 13:14:45,321 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-01 13:14:45,321 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2024-12-01 13:14:45,321 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 01:14:45 BoogieIcfgContainer [2024-12-01 13:14:45,321 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-01 13:14:45,324 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-01 13:14:45,324 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-01 13:14:45,329 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-01 13:14:45,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 01:14:44" (1/3) ... [2024-12-01 13:14:45,329 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@500045cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 01:14:45, skipping insertion in model container [2024-12-01 13:14:45,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 01:14:45" (2/3) ... [2024-12-01 13:14:45,330 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@500045cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 01:14:45, skipping insertion in model container [2024-12-01 13:14:45,330 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 01:14:45" (3/3) ... [2024-12-01 13:14:45,331 INFO L128 eAbstractionObserver]: Analyzing ICFG feedback_diverge.c [2024-12-01 13:14:45,346 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-01 13:14:45,348 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG feedback_diverge.c that has 1 procedures, 17 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2024-12-01 13:14:45,390 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-01 13:14:45,402 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;@39a00eb2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-01 13:14:45,402 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-12-01 13:14:45,405 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 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) [2024-12-01 13:14:45,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-12-01 13:14:45,409 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 13:14:45,409 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-12-01 13:14:45,409 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 13:14:45,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:14:45,413 INFO L85 PathProgramCache]: Analyzing trace with hash 889680507, now seen corresponding path program 1 times [2024-12-01 13:14:45,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:14:45,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299438167] [2024-12-01 13:14:45,419 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:14:45,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:14:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:14:45,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:14:45,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:14:45,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299438167] [2024-12-01 13:14:45,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299438167] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-01 13:14:45,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-01 13:14:45,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-01 13:14:45,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288555040] [2024-12-01 13:14:45,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-01 13:14:45,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-01 13:14:45,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:14:45,577 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-01 13:14:45,578 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-01 13:14:45,579 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2024-12-01 13:14:45,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 13:14:45,603 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2024-12-01 13:14:45,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-01 13:14:45,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-12-01 13:14:45,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 13:14:45,610 INFO L225 Difference]: With dead ends: 39 [2024-12-01 13:14:45,610 INFO L226 Difference]: Without dead ends: 20 [2024-12-01 13:14:45,612 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-01 13:14:45,614 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-01 13:14:45,615 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-01 13:14:45,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-12-01 13:14:45,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2024-12-01 13:14:45,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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) [2024-12-01 13:14:45,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2024-12-01 13:14:45,639 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 6 [2024-12-01 13:14:45,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 13:14:45,640 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2024-12-01 13:14:45,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2024-12-01 13:14:45,640 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2024-12-01 13:14:45,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-12-01 13:14:45,640 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 13:14:45,640 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-01 13:14:45,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-01 13:14:45,641 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 13:14:45,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:14:45,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1803992405, now seen corresponding path program 1 times [2024-12-01 13:14:45,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:14:45,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936149642] [2024-12-01 13:14:45,642 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:14:45,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:14:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:14:45,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:14:45,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:14:45,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936149642] [2024-12-01 13:14:45,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936149642] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 13:14:45,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205426330] [2024-12-01 13:14:45,724 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-01 13:14:45,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:14:45,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:14:45,726 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 13:14:45,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-01 13:14:45,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:14:45,774 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-01 13:14:45,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 13:14:45,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:14:45,827 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 13:14:45,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:14:45,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205426330] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 13:14:45,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 13:14:45,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-12-01 13:14:45,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931306038] [2024-12-01 13:14:45,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 13:14:45,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-01 13:14:45,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:14:45,866 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-01 13:14:45,866 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-12-01 13:14:45,866 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:14:45,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 13:14:45,897 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2024-12-01 13:14:45,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-01 13:14:45,897 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-12-01 13:14:45,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 13:14:45,898 INFO L225 Difference]: With dead ends: 39 [2024-12-01 13:14:45,898 INFO L226 Difference]: Without dead ends: 35 [2024-12-01 13:14:45,898 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-12-01 13:14:45,899 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-01 13:14:45,900 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 40 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-01 13:14:45,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-12-01 13:14:45,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-12-01 13:14:45,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 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) [2024-12-01 13:14:45,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2024-12-01 13:14:45,905 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 11 [2024-12-01 13:14:45,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 13:14:45,905 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2024-12-01 13:14:45,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-01 13:14:45,906 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2024-12-01 13:14:45,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-12-01 13:14:45,906 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 13:14:45,906 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2024-12-01 13:14:45,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-01 13:14:46,107 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-12-01 13:14:46,107 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 13:14:46,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:14:46,107 INFO L85 PathProgramCache]: Analyzing trace with hash 938421883, now seen corresponding path program 2 times [2024-12-01 13:14:46,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:14:46,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6129377] [2024-12-01 13:14:46,108 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-01 13:14:46,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:14:46,134 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-01 13:14:46,134 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:14:46,264 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:14:46,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:14:46,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6129377] [2024-12-01 13:14:46,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6129377] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 13:14:46,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129896264] [2024-12-01 13:14:46,264 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-01 13:14:46,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:14:46,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:14:46,266 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 13:14:46,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-01 13:14:46,318 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-01 13:14:46,318 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:14:46,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-12-01 13:14:46,320 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 13:14:46,381 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:14:46,381 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 13:14:46,493 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:14:46,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129896264] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 13:14:46,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 13:14:46,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-12-01 13:14:46,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569539650] [2024-12-01 13:14:46,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 13:14:46,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-12-01 13:14:46,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:14:46,495 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-12-01 13:14:46,495 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-12-01 13:14:46,495 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 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) [2024-12-01 13:14:46,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 13:14:46,561 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2024-12-01 13:14:46,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-01 13:14:46,561 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-12-01 13:14:46,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 13:14:46,562 INFO L225 Difference]: With dead ends: 81 [2024-12-01 13:14:46,562 INFO L226 Difference]: Without dead ends: 77 [2024-12-01 13:14:46,563 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-12-01 13:14:46,564 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 101 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-01 13:14:46,564 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 70 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-01 13:14:46,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-12-01 13:14:46,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-12-01 13:14:46,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.144736842105263) internal successors, (87), 76 states have internal predecessors, (87), 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) [2024-12-01 13:14:46,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2024-12-01 13:14:46,573 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 26 [2024-12-01 13:14:46,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 13:14:46,573 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2024-12-01 13:14:46,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 13 states have internal predecessors, (54), 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) [2024-12-01 13:14:46,574 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2024-12-01 13:14:46,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-12-01 13:14:46,575 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 13:14:46,575 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2024-12-01 13:14:46,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-01 13:14:46,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:14:46,775 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 13:14:46,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:14:46,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1588955259, now seen corresponding path program 3 times [2024-12-01 13:14:46,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:14:46,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238010630] [2024-12-01 13:14:46,776 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-01 13:14:46,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:14:46,806 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-12-01 13:14:46,806 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:14:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:14:47,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:14:47,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238010630] [2024-12-01 13:14:47,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238010630] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 13:14:47,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570744946] [2024-12-01 13:14:47,034 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-01 13:14:47,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:14:47,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:14:47,036 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 13:14:47,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-01 13:14:47,116 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-12-01 13:14:47,116 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:14:47,117 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-01 13:14:47,120 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 13:14:47,214 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:14:47,214 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 13:14:47,487 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:14:47,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570744946] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 13:14:47,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 13:14:47,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-12-01 13:14:47,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419567677] [2024-12-01 13:14:47,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 13:14:47,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-12-01 13:14:47,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:14:47,489 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-12-01 13:14:47,490 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-12-01 13:14:47,490 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 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) [2024-12-01 13:14:47,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 13:14:47,608 INFO L93 Difference]: Finished difference Result 165 states and 198 transitions. [2024-12-01 13:14:47,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-12-01 13:14:47,609 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2024-12-01 13:14:47,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 13:14:47,610 INFO L225 Difference]: With dead ends: 165 [2024-12-01 13:14:47,610 INFO L226 Difference]: Without dead ends: 161 [2024-12-01 13:14:47,610 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-12-01 13:14:47,611 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 164 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-01 13:14:47,611 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 164 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-01 13:14:47,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-12-01 13:14:47,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2024-12-01 13:14:47,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.14375) internal successors, (183), 160 states have internal predecessors, (183), 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) [2024-12-01 13:14:47,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 183 transitions. [2024-12-01 13:14:47,624 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 183 transitions. Word has length 56 [2024-12-01 13:14:47,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 13:14:47,624 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 183 transitions. [2024-12-01 13:14:47,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.56) internal successors, (114), 25 states have internal predecessors, (114), 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) [2024-12-01 13:14:47,624 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 183 transitions. [2024-12-01 13:14:47,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2024-12-01 13:14:47,627 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 13:14:47,627 INFO L218 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2024-12-01 13:14:47,636 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-01 13:14:47,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:14:47,828 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 13:14:47,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:14:47,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1637203067, now seen corresponding path program 4 times [2024-12-01 13:14:47,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:14:47,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163288271] [2024-12-01 13:14:47,828 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-01 13:14:47,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:14:47,865 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-01 13:14:47,865 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:14:48,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:14:48,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:14:48,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163288271] [2024-12-01 13:14:48,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163288271] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 13:14:48,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515069166] [2024-12-01 13:14:48,653 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-01 13:14:48,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:14:48,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:14:48,655 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 13:14:48,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-01 13:14:48,760 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-01 13:14:48,760 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:14:48,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-12-01 13:14:48,768 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 13:14:48,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:14:48,965 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 13:14:49,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:14:49,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515069166] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 13:14:49,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 13:14:49,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2024-12-01 13:14:49,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811666150] [2024-12-01 13:14:49,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 13:14:49,823 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-12-01 13:14:49,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:14:49,824 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-12-01 13:14:49,824 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2024-12-01 13:14:49,825 INFO L87 Difference]: Start difference. First operand 161 states and 183 transitions. Second operand has 48 states, 48 states have (on average 4.75) internal successors, (228), 48 states have internal predecessors, (228), 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) [2024-12-01 13:14:50,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 13:14:50,032 INFO L93 Difference]: Finished difference Result 333 states and 402 transitions. [2024-12-01 13:14:50,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-12-01 13:14:50,033 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.75) internal successors, (228), 48 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2024-12-01 13:14:50,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 13:14:50,034 INFO L225 Difference]: With dead ends: 333 [2024-12-01 13:14:50,034 INFO L226 Difference]: Without dead ends: 329 [2024-12-01 13:14:50,035 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2024-12-01 13:14:50,036 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 539 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-01 13:14:50,036 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 298 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-01 13:14:50,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2024-12-01 13:14:50,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2024-12-01 13:14:50,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.1432926829268293) internal successors, (375), 328 states have internal predecessors, (375), 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) [2024-12-01 13:14:50,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 375 transitions. [2024-12-01 13:14:50,055 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 375 transitions. Word has length 116 [2024-12-01 13:14:50,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 13:14:50,055 INFO L471 AbstractCegarLoop]: Abstraction has 329 states and 375 transitions. [2024-12-01 13:14:50,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.75) internal successors, (228), 48 states have internal predecessors, (228), 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) [2024-12-01 13:14:50,056 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 375 transitions. [2024-12-01 13:14:50,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2024-12-01 13:14:50,059 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 13:14:50,060 INFO L218 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2024-12-01 13:14:50,068 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-01 13:14:50,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:14:50,260 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 13:14:50,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:14:50,261 INFO L85 PathProgramCache]: Analyzing trace with hash -232512389, now seen corresponding path program 5 times [2024-12-01 13:14:50,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:14:50,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206711862] [2024-12-01 13:14:50,261 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-01 13:14:50,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:14:50,325 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2024-12-01 13:14:50,325 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:14:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:14:52,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:14:52,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206711862] [2024-12-01 13:14:52,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206711862] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 13:14:52,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118221213] [2024-12-01 13:14:52,094 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-01 13:14:52,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:14:52,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:14:52,096 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 13:14:52,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-01 13:14:52,257 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2024-12-01 13:14:52,257 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:14:52,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-12-01 13:14:52,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 13:14:52,562 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:14:52,562 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 13:14:54,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5221 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:14:54,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118221213] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 13:14:54,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 13:14:54,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 96 [2024-12-01 13:14:54,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529966961] [2024-12-01 13:14:54,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 13:14:54,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2024-12-01 13:14:54,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:14:54,914 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2024-12-01 13:14:54,915 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2024-12-01 13:14:54,916 INFO L87 Difference]: Start difference. First operand 329 states and 375 transitions. Second operand has 96 states, 96 states have (on average 4.875) internal successors, (468), 96 states have internal predecessors, (468), 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) [2024-12-01 13:14:56,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 13:14:56,220 INFO L93 Difference]: Finished difference Result 669 states and 810 transitions. [2024-12-01 13:14:56,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-12-01 13:14:56,221 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 4.875) internal successors, (468), 96 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 236 [2024-12-01 13:14:56,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 13:14:56,224 INFO L225 Difference]: With dead ends: 669 [2024-12-01 13:14:56,224 INFO L226 Difference]: Without dead ends: 665 [2024-12-01 13:14:56,225 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2024-12-01 13:14:56,226 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 1193 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-01 13:14:56,226 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1193 Valid, 594 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-01 13:14:56,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2024-12-01 13:14:56,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 665. [2024-12-01 13:14:56,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 1.1430722891566265) internal successors, (759), 664 states have internal predecessors, (759), 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) [2024-12-01 13:14:56,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 759 transitions. [2024-12-01 13:14:56,256 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 759 transitions. Word has length 236 [2024-12-01 13:14:56,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 13:14:56,256 INFO L471 AbstractCegarLoop]: Abstraction has 665 states and 759 transitions. [2024-12-01 13:14:56,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 4.875) internal successors, (468), 96 states have internal predecessors, (468), 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) [2024-12-01 13:14:56,257 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 759 transitions. [2024-12-01 13:14:56,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2024-12-01 13:14:56,262 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 13:14:56,263 INFO L218 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1] [2024-12-01 13:14:56,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-01 13:14:56,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:14:56,463 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 13:14:56,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:14:56,464 INFO L85 PathProgramCache]: Analyzing trace with hash 712569979, now seen corresponding path program 6 times [2024-12-01 13:14:56,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:14:56,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834693279] [2024-12-01 13:14:56,464 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-01 13:14:56,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:14:56,627 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2024-12-01 13:14:56,627 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:15:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 21949 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:15:02,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:15:02,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834693279] [2024-12-01 13:15:02,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834693279] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 13:15:02,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260090466] [2024-12-01 13:15:02,035 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-01 13:15:02,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:15:02,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:15:02,037 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 13:15:02,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-01 13:15:02,366 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2024-12-01 13:15:02,366 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:15:02,370 INFO L256 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-12-01 13:15:02,379 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 13:15:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 21949 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:15:02,876 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 13:15:11,489 INFO L134 CoverageAnalysis]: Checked inductivity of 21949 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:15:11,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260090466] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 13:15:11,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 13:15:11,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2024-12-01 13:15:11,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053073300] [2024-12-01 13:15:11,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 13:15:11,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2024-12-01 13:15:11,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:15:11,494 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2024-12-01 13:15:11,498 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2024-12-01 13:15:11,499 INFO L87 Difference]: Start difference. First operand 665 states and 759 transitions. Second operand has 193 states, 193 states have (on average 4.94300518134715) internal successors, (954), 193 states have internal predecessors, (954), 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) [2024-12-01 13:15:24,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 13:15:24,639 INFO L93 Difference]: Finished difference Result 1341 states and 1626 transitions. [2024-12-01 13:15:24,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2024-12-01 13:15:24,640 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 4.94300518134715) internal successors, (954), 193 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 476 [2024-12-01 13:15:24,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 13:15:24,643 INFO L225 Difference]: With dead ends: 1341 [2024-12-01 13:15:24,643 INFO L226 Difference]: Without dead ends: 1337 [2024-12-01 13:15:24,646 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1047 GetRequests, 856 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2024-12-01 13:15:24,647 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 2930 mSDsluCounter, 1142 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2930 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-01 13:15:24,647 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2930 Valid, 1154 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-01 13:15:24,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2024-12-01 13:15:24,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1337. [2024-12-01 13:15:24,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1336 states have (on average 1.1429640718562875) internal successors, (1527), 1336 states have internal predecessors, (1527), 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) [2024-12-01 13:15:24,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 1527 transitions. [2024-12-01 13:15:24,668 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 1527 transitions. Word has length 476 [2024-12-01 13:15:24,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 13:15:24,668 INFO L471 AbstractCegarLoop]: Abstraction has 1337 states and 1527 transitions. [2024-12-01 13:15:24,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 4.94300518134715) internal successors, (954), 193 states have internal predecessors, (954), 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) [2024-12-01 13:15:24,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 1527 transitions. [2024-12-01 13:15:24,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 957 [2024-12-01 13:15:24,689 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 13:15:24,689 INFO L218 NwaCegarLoop]: trace histogram [190, 190, 190, 190, 190, 1, 1, 1, 1, 1, 1] [2024-12-01 13:15:24,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-01 13:15:24,889 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-12-01 13:15:24,890 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 13:15:24,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:15:24,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1476564091, now seen corresponding path program 7 times [2024-12-01 13:15:24,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:15:24,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862881252] [2024-12-01 13:15:24,890 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-01 13:15:24,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:15:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:15:48,133 INFO L134 CoverageAnalysis]: Checked inductivity of 89965 backedges. 0 proven. 89965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:15:48,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:15:48,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862881252] [2024-12-01 13:15:48,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862881252] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 13:15:48,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248299480] [2024-12-01 13:15:48,134 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-01 13:15:48,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:15:48,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:15:48,135 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 13:15:48,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-01 13:15:48,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-01 13:15:48,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 2125 conjuncts, 192 conjuncts are in the unsatisfiable core [2024-12-01 13:15:48,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 13:15:49,400 INFO L134 CoverageAnalysis]: Checked inductivity of 89965 backedges. 0 proven. 89965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:15:49,400 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 13:16:23,403 INFO L134 CoverageAnalysis]: Checked inductivity of 89965 backedges. 0 proven. 89965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:16:23,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248299480] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 13:16:23,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 13:16:23,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193, 193] total 385 [2024-12-01 13:16:23,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243228483] [2024-12-01 13:16:23,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 13:16:23,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2024-12-01 13:16:23,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:16:23,418 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2024-12-01 13:16:23,425 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2024-12-01 13:16:23,426 INFO L87 Difference]: Start difference. First operand 1337 states and 1527 transitions. Second operand has 385 states, 385 states have (on average 4.9714285714285715) internal successors, (1914), 385 states have internal predecessors, (1914), 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) [2024-12-01 13:19:38,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-01 13:19:38,422 INFO L93 Difference]: Finished difference Result 2685 states and 3258 transitions. [2024-12-01 13:19:38,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2024-12-01 13:19:38,423 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 4.9714285714285715) internal successors, (1914), 385 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 956 [2024-12-01 13:19:38,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-01 13:19:38,428 INFO L225 Difference]: With dead ends: 2685 [2024-12-01 13:19:38,428 INFO L226 Difference]: Without dead ends: 2681 [2024-12-01 13:19:38,432 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2103 GetRequests, 1720 SyntacticMatches, 0 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 43.7s TimeCoverageRelationStatistics Valid=73920, Invalid=73920, Unknown=0, NotChecked=0, Total=147840 [2024-12-01 13:19:38,432 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 6212 mSDsluCounter, 2318 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6212 SdHoareTripleChecker+Valid, 2330 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-12-01 13:19:38,433 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6212 Valid, 2330 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-12-01 13:19:38,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2681 states. [2024-12-01 13:19:38,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2681 to 2681. [2024-12-01 13:19:38,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2681 states, 2680 states have (on average 1.142910447761194) internal successors, (3063), 2680 states have internal predecessors, (3063), 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) [2024-12-01 13:19:38,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2681 states to 2681 states and 3063 transitions. [2024-12-01 13:19:38,464 INFO L78 Accepts]: Start accepts. Automaton has 2681 states and 3063 transitions. Word has length 956 [2024-12-01 13:19:38,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-01 13:19:38,465 INFO L471 AbstractCegarLoop]: Abstraction has 2681 states and 3063 transitions. [2024-12-01 13:19:38,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 4.9714285714285715) internal successors, (1914), 385 states have internal predecessors, (1914), 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) [2024-12-01 13:19:38,466 INFO L276 IsEmpty]: Start isEmpty. Operand 2681 states and 3063 transitions. [2024-12-01 13:19:38,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1917 [2024-12-01 13:19:38,482 INFO L210 NwaCegarLoop]: Found error trace [2024-12-01 13:19:38,482 INFO L218 NwaCegarLoop]: trace histogram [382, 382, 382, 382, 382, 1, 1, 1, 1, 1, 1] [2024-12-01 13:19:38,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-12-01 13:19:38,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:19:38,683 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-12-01 13:19:38,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-01 13:19:38,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1500130181, now seen corresponding path program 8 times [2024-12-01 13:19:38,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-01 13:19:38,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400456492] [2024-12-01 13:19:38,683 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-01 13:19:38,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-01 13:19:39,353 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-01 13:19:39,353 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:21:49,302 INFO L134 CoverageAnalysis]: Checked inductivity of 364237 backedges. 0 proven. 364237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:21:49,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-01 13:21:49,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400456492] [2024-12-01 13:21:49,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400456492] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-01 13:21:49,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052123998] [2024-12-01 13:21:49,302 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-01 13:21:49,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-01 13:21:49,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-01 13:21:49,304 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-01 13:21:49,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_66b2f7d1-33fb-45f1-9a19-c03b7e6fc3e4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-01 13:21:49,982 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-01 13:21:49,982 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-01 13:21:49,999 INFO L256 TraceCheckSpWp]: Trace formula consists of 4237 conjuncts, 384 conjuncts are in the unsatisfiable core [2024-12-01 13:21:50,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-01 13:21:51,645 INFO L134 CoverageAnalysis]: Checked inductivity of 364237 backedges. 0 proven. 364237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:21:51,645 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-01 13:24:09,215 INFO L134 CoverageAnalysis]: Checked inductivity of 364237 backedges. 0 proven. 364237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-01 13:24:09,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052123998] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-01 13:24:09,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-01 13:24:09,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [385, 385, 385] total 769 [2024-12-01 13:24:09,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218888143] [2024-12-01 13:24:09,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-01 13:24:09,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 769 states [2024-12-01 13:24:09,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-01 13:24:09,252 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 769 interpolants. [2024-12-01 13:24:09,265 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=295296, Invalid=295296, Unknown=0, NotChecked=0, Total=590592 [2024-12-01 13:24:09,266 INFO L87 Difference]: Start difference. First operand 2681 states and 3063 transitions. Second operand has 769 states, 769 states have (on average 4.985695708712614) internal successors, (3834), 769 states have internal predecessors, (3834), 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)