./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/MultCommutative-2.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_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/MultCommutative-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 23:26:44,074 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 23:26:44,178 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-27 23:26:44,188 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 23:26:44,189 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 23:26:44,229 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 23:26:44,230 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 23:26:44,230 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 23:26:44,230 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 23:26:44,230 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 23:26:44,230 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 23:26:44,231 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 23:26:44,232 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 23:26:44,232 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 23:26:44,233 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 23:26:44,234 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 23:26:44,234 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-27 23:26:44,234 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 23:26:44,234 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 23:26:44,235 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 23:26:44,235 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 23:26:44,235 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-27 23:26:44,235 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 23:26:44,235 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-27 23:26:44,235 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 23:26:44,235 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-27 23:26:44,235 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 23:26:44,235 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 23:26:44,235 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 23:26:44,236 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:26:44,236 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:26:44,236 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:26:44,236 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:26:44,236 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 23:26:44,236 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:26:44,237 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:26:44,237 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:26:44,237 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:26:44,237 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 23:26:44,237 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 23:26:44,237 INFO L153 SettingsManager]: * Compute procedure contracts=false [2024-11-27 23:26:44,237 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-27 23:26:44,237 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 23:26:44,237 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 23:26:44,238 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 23:26:44,238 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 23:26:44,238 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 23:26:44,238 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 23:26:44,238 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_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd [2024-11-27 23:26:44,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 23:26:44,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 23:26:44,592 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 23:26:44,594 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 23:26:44,595 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 23:26:44,597 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/recursive/MultCommutative-2.c [2024-11-27 23:26:47,607 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/data/893c91014/308e7319ad78486bb91269c844a0dcb8/FLAG9418257f9 [2024-11-27 23:26:47,939 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 23:26:47,943 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/sv-benchmarks/c/recursive/MultCommutative-2.c [2024-11-27 23:26:47,962 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/data/893c91014/308e7319ad78486bb91269c844a0dcb8/FLAG9418257f9 [2024-11-27 23:26:47,989 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/data/893c91014/308e7319ad78486bb91269c844a0dcb8 [2024-11-27 23:26:47,991 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 23:26:47,994 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 23:26:47,996 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 23:26:47,996 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 23:26:48,001 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 23:26:48,002 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:26:47" (1/1) ... [2024-11-27 23:26:48,003 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ded057b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:48, skipping insertion in model container [2024-11-27 23:26:48,003 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:26:47" (1/1) ... [2024-11-27 23:26:48,022 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 23:26:48,216 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_196067b6-a0fe-4fd3-af93-1c5d5f67443a/sv-benchmarks/c/recursive/MultCommutative-2.c[970,983] [2024-11-27 23:26:48,224 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:26:48,235 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 23:26:48,254 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_196067b6-a0fe-4fd3-af93-1c5d5f67443a/sv-benchmarks/c/recursive/MultCommutative-2.c[970,983] [2024-11-27 23:26:48,256 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:26:48,271 INFO L204 MainTranslator]: Completed translation [2024-11-27 23:26:48,272 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:48 WrapperNode [2024-11-27 23:26:48,272 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 23:26:48,273 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 23:26:48,274 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 23:26:48,274 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 23:26:48,285 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:48" (1/1) ... [2024-11-27 23:26:48,293 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:48" (1/1) ... [2024-11-27 23:26:48,311 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 37 [2024-11-27 23:26:48,311 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 23:26:48,312 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 23:26:48,312 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 23:26:48,314 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 23:26:48,323 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:48" (1/1) ... [2024-11-27 23:26:48,323 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:48" (1/1) ... [2024-11-27 23:26:48,324 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:48" (1/1) ... [2024-11-27 23:26:48,348 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]. [2024-11-27 23:26:48,348 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:48" (1/1) ... [2024-11-27 23:26:48,348 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:48" (1/1) ... [2024-11-27 23:26:48,352 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:48" (1/1) ... [2024-11-27 23:26:48,355 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:48" (1/1) ... [2024-11-27 23:26:48,360 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:48" (1/1) ... [2024-11-27 23:26:48,361 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:48" (1/1) ... [2024-11-27 23:26:48,365 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:48" (1/1) ... [2024-11-27 23:26:48,367 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 23:26:48,368 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 23:26:48,368 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 23:26:48,368 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 23:26:48,370 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:48" (1/1) ... [2024-11-27 23:26:48,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:26:48,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:26:48,415 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 23:26:48,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 23:26:48,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 23:26:48,450 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2024-11-27 23:26:48,450 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2024-11-27 23:26:48,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 23:26:48,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 23:26:48,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 23:26:48,507 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 23:26:48,509 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 23:26:48,660 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-11-27 23:26:48,662 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 23:26:48,672 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 23:26:48,673 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-27 23:26:48,673 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:26:48 BoogieIcfgContainer [2024-11-27 23:26:48,674 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 23:26:48,676 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 23:26:48,676 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 23:26:48,682 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 23:26:48,682 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:26:47" (1/3) ... [2024-11-27 23:26:48,683 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b988062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:26:48, skipping insertion in model container [2024-11-27 23:26:48,683 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:48" (2/3) ... [2024-11-27 23:26:48,683 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b988062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:26:48, skipping insertion in model container [2024-11-27 23:26:48,684 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:26:48" (3/3) ... [2024-11-27 23:26:48,685 INFO L128 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2024-11-27 23:26:48,699 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 23:26:48,703 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG MultCommutative-2.c that has 2 procedures, 23 locations, 1 initial locations, 0 loop locations, and 1 error locations. [2024-11-27 23:26:48,770 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 23:26:48,786 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;@dea6048, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 23:26:48,787 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-27 23:26:48,792 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-11-27 23:26:48,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-27 23:26:48,801 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:26:48,801 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:26:48,802 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:26:48,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:26:48,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1513944532, now seen corresponding path program 1 times [2024-11-27 23:26:48,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:26:48,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835374022] [2024-11-27 23:26:48,821 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:26:48,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:26:48,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:26:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-27 23:26:49,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:26:49,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835374022] [2024-11-27 23:26:49,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835374022] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:26:49,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:26:49,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 23:26:49,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707642711] [2024-11-27 23:26:49,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:26:49,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 23:26:49,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:26:49,359 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 23:26:49,360 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:26:49,362 INFO L87 Difference]: Start difference. First operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 23:26:49,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:26:49,515 INFO L93 Difference]: Finished difference Result 36 states and 49 transitions. [2024-11-27 23:26:49,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 23:26:49,519 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2024-11-27 23:26:49,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:26:49,527 INFO L225 Difference]: With dead ends: 36 [2024-11-27 23:26:49,530 INFO L226 Difference]: Without dead ends: 26 [2024-11-27 23:26:49,533 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-27 23:26:49,539 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:26:49,540 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 138 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:26:49,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-27 23:26:49,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2024-11-27 23:26:49,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-27 23:26:49,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2024-11-27 23:26:49,592 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 20 [2024-11-27 23:26:49,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:26:49,592 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2024-11-27 23:26:49,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-27 23:26:49,595 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2024-11-27 23:26:49,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-11-27 23:26:49,598 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:26:49,598 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:26:49,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 23:26:49,599 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:26:49,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:26:49,600 INFO L85 PathProgramCache]: Analyzing trace with hash 555960324, now seen corresponding path program 1 times [2024-11-27 23:26:49,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:26:49,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214042079] [2024-11-27 23:26:49,601 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:26:49,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:26:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:26:49,923 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-11-27 23:26:49,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:26:49,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214042079] [2024-11-27 23:26:49,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214042079] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:26:49,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:26:49,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-27 23:26:49,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800544823] [2024-11-27 23:26:49,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:26:49,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 23:26:49,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:26:49,927 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 23:26:49,928 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-11-27 23:26:49,928 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:26:50,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:26:50,035 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2024-11-27 23:26:50,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 23:26:50,037 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-11-27 23:26:50,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:26:50,038 INFO L225 Difference]: With dead ends: 35 [2024-11-27 23:26:50,038 INFO L226 Difference]: Without dead ends: 31 [2024-11-27 23:26:50,039 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:26:50,039 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:26:50,040 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 141 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:26:50,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-11-27 23:26:50,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2024-11-27 23:26:50,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2024-11-27 23:26:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2024-11-27 23:26:50,057 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 26 [2024-11-27 23:26:50,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:26:50,057 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2024-11-27 23:26:50,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:26:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2024-11-27 23:26:50,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-27 23:26:50,058 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:26:50,059 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:26:50,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 23:26:50,060 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:26:50,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:26:50,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1817517416, now seen corresponding path program 1 times [2024-11-27 23:26:50,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:26:50,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776818342] [2024-11-27 23:26:50,062 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:26:50,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:26:50,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:26:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-27 23:26:50,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:26:50,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776818342] [2024-11-27 23:26:50,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776818342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:26:50,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114777206] [2024-11-27 23:26:50,203 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:26:50,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:26:50,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:26:50,206 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:26:50,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 23:26:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:26:50,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 23:26:50,300 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:26:50,374 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-27 23:26:50,374 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:26:50,528 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-27 23:26:50,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114777206] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:26:50,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:26:50,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2024-11-27 23:26:50,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502304109] [2024-11-27 23:26:50,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:26:50,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 23:26:50,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:26:50,534 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 23:26:50,535 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:26:50,535 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:26:50,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:26:50,689 INFO L93 Difference]: Finished difference Result 35 states and 53 transitions. [2024-11-27 23:26:50,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:26:50,690 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2024-11-27 23:26:50,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:26:50,690 INFO L225 Difference]: With dead ends: 35 [2024-11-27 23:26:50,691 INFO L226 Difference]: Without dead ends: 27 [2024-11-27 23:26:50,691 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:26:50,692 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:26:50,692 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:26:50,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-27 23:26:50,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2024-11-27 23:26:50,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-11-27 23:26:50,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2024-11-27 23:26:50,704 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 27 [2024-11-27 23:26:50,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:26:50,704 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2024-11-27 23:26:50,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:26:50,705 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2024-11-27 23:26:50,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-11-27 23:26:50,706 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:26:50,708 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:26:50,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 23:26:50,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:26:50,909 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:26:50,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:26:50,910 INFO L85 PathProgramCache]: Analyzing trace with hash 2011031750, now seen corresponding path program 2 times [2024-11-27 23:26:50,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:26:50,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500513407] [2024-11-27 23:26:50,910 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:26:50,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:26:50,933 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:26:50,934 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:26:51,034 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-27 23:26:51,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:26:51,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500513407] [2024-11-27 23:26:51,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500513407] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:26:51,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:26:51,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 23:26:51,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857126677] [2024-11-27 23:26:51,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:26:51,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 23:26:51,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:26:51,036 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 23:26:51,037 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:26:51,037 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:26:51,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:26:51,109 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2024-11-27 23:26:51,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 23:26:51,110 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2024-11-27 23:26:51,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:26:51,112 INFO L225 Difference]: With dead ends: 29 [2024-11-27 23:26:51,113 INFO L226 Difference]: Without dead ends: 25 [2024-11-27 23:26:51,113 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-27 23:26:51,114 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:26:51,114 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 38 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:26:51,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-11-27 23:26:51,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-11-27 23:26:51,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-27 23:26:51,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2024-11-27 23:26:51,125 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 27 [2024-11-27 23:26:51,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:26:51,125 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2024-11-27 23:26:51,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:26:51,125 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2024-11-27 23:26:51,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-27 23:26:51,127 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:26:51,127 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:26:51,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-27 23:26:51,127 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:26:51,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:26:51,128 INFO L85 PathProgramCache]: Analyzing trace with hash 345194942, now seen corresponding path program 1 times [2024-11-27 23:26:51,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:26:51,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249808222] [2024-11-27 23:26:51,128 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:26:51,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:26:51,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:26:51,309 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-27 23:26:51,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:26:51,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249808222] [2024-11-27 23:26:51,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249808222] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:26:51,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439802084] [2024-11-27 23:26:51,309 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:26:51,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:26:51,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:26:51,315 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:26:51,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 23:26:51,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:26:51,375 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-27 23:26:51,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:26:51,426 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-27 23:26:51,427 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:26:51,623 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-11-27 23:26:51,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439802084] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:26:51,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:26:51,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2024-11-27 23:26:51,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154686302] [2024-11-27 23:26:51,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:26:51,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 23:26:51,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:26:51,624 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 23:26:51,624 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:26:51,625 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 4 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-27 23:26:51,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:26:51,828 INFO L93 Difference]: Finished difference Result 47 states and 63 transitions. [2024-11-27 23:26:51,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 23:26:51,829 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 4 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) Word has length 46 [2024-11-27 23:26:51,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:26:51,830 INFO L225 Difference]: With dead ends: 47 [2024-11-27 23:26:51,832 INFO L226 Difference]: Without dead ends: 39 [2024-11-27 23:26:51,833 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:26:51,833 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:26:51,835 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 117 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:26:51,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-27 23:26:51,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2024-11-27 23:26:51,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 24 states have internal predecessors, (24), 4 states have call successors, (4), 1 states have call predecessors, (4), 6 states have return successors, (16), 7 states have call predecessors, (16), 4 states have call successors, (16) [2024-11-27 23:26:51,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2024-11-27 23:26:51,855 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 46 [2024-11-27 23:26:51,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:26:51,857 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2024-11-27 23:26:51,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 11 states have internal predecessors, (31), 4 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (9), 7 states have call predecessors, (9), 4 states have call successors, (9) [2024-11-27 23:26:51,858 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2024-11-27 23:26:51,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-27 23:26:51,862 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:26:51,862 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:26:51,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 23:26:52,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:26:52,063 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:26:52,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:26:52,063 INFO L85 PathProgramCache]: Analyzing trace with hash -760266050, now seen corresponding path program 3 times [2024-11-27 23:26:52,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:26:52,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664538339] [2024-11-27 23:26:52,063 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:26:52,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:26:52,086 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-27 23:26:52,086 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:26:52,848 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-27 23:26:52,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:26:52,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664538339] [2024-11-27 23:26:52,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664538339] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:26:52,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288151244] [2024-11-27 23:26:52,849 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:26:52,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:26:52,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:26:52,852 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:26:52,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 23:26:52,907 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-27 23:26:52,908 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:26:52,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-27 23:26:52,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:26:53,394 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 23:26:53,394 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:26:54,710 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 23:26:54,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288151244] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:26:54,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:26:54,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 17] total 35 [2024-11-27 23:26:54,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432564702] [2024-11-27 23:26:54,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:26:54,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-27 23:26:54,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:26:54,712 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-27 23:26:54,713 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2024-11-27 23:26:54,714 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 35 states, 32 states have (on average 1.65625) internal successors, (53), 25 states have internal predecessors, (53), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-27 23:26:55,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:26:55,534 INFO L93 Difference]: Finished difference Result 47 states and 63 transitions. [2024-11-27 23:26:55,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-27 23:26:55,535 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.65625) internal successors, (53), 25 states have internal predecessors, (53), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) Word has length 34 [2024-11-27 23:26:55,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:26:55,536 INFO L225 Difference]: With dead ends: 47 [2024-11-27 23:26:55,536 INFO L226 Difference]: Without dead ends: 43 [2024-11-27 23:26:55,540 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=256, Invalid=1636, Unknown=0, NotChecked=0, Total=1892 [2024-11-27 23:26:55,541 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 52 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 23:26:55,542 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 194 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 23:26:55,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-27 23:26:55,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2024-11-27 23:26:55,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.08) internal successors, (27), 27 states have internal predecessors, (27), 5 states have call successors, (5), 1 states have call predecessors, (5), 7 states have return successors, (21), 9 states have call predecessors, (21), 5 states have call successors, (21) [2024-11-27 23:26:55,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 53 transitions. [2024-11-27 23:26:55,565 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 53 transitions. Word has length 34 [2024-11-27 23:26:55,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:26:55,566 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 53 transitions. [2024-11-27 23:26:55,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.65625) internal successors, (53), 25 states have internal predecessors, (53), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2024-11-27 23:26:55,566 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 53 transitions. [2024-11-27 23:26:55,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-27 23:26:55,567 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:26:55,567 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:26:55,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 23:26:55,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:26:55,773 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:26:55,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:26:55,774 INFO L85 PathProgramCache]: Analyzing trace with hash -983670890, now seen corresponding path program 4 times [2024-11-27 23:26:55,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:26:55,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124015082] [2024-11-27 23:26:55,774 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:26:55,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:26:55,812 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:26:55,812 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:26:56,502 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-27 23:26:56,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:26:56,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124015082] [2024-11-27 23:26:56,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124015082] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:26:56,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249581083] [2024-11-27 23:26:56,502 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:26:56,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:26:56,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:26:56,504 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:26:56,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 23:26:56,560 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:26:56,560 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:26:56,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-27 23:26:56,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:26:56,870 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-27 23:26:56,870 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:26:57,670 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-27 23:26:57,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249581083] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:26:57,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:26:57,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 18] total 38 [2024-11-27 23:26:57,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624587461] [2024-11-27 23:26:57,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:26:57,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-27 23:26:57,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:26:57,672 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-27 23:26:57,673 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2024-11-27 23:26:57,673 INFO L87 Difference]: Start difference. First operand 38 states and 53 transitions. Second operand has 38 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 27 states have internal predecessors, (53), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) [2024-11-27 23:26:58,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:26:58,857 INFO L93 Difference]: Finished difference Result 77 states and 126 transitions. [2024-11-27 23:26:58,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-27 23:26:58,857 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 27 states have internal predecessors, (53), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) Word has length 41 [2024-11-27 23:26:58,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:26:58,861 INFO L225 Difference]: With dead ends: 77 [2024-11-27 23:26:58,861 INFO L226 Difference]: Without dead ends: 60 [2024-11-27 23:26:58,867 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=411, Invalid=2895, Unknown=0, NotChecked=0, Total=3306 [2024-11-27 23:26:58,868 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 45 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-27 23:26:58,868 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 209 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-27 23:26:58,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-11-27 23:26:58,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2024-11-27 23:26:58,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 35 states have internal predecessors, (36), 7 states have call successors, (7), 2 states have call predecessors, (7), 9 states have return successors, (34), 12 states have call predecessors, (34), 7 states have call successors, (34) [2024-11-27 23:26:58,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 77 transitions. [2024-11-27 23:26:58,893 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 77 transitions. Word has length 41 [2024-11-27 23:26:58,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:26:58,894 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 77 transitions. [2024-11-27 23:26:58,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 27 states have internal predecessors, (53), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) [2024-11-27 23:26:58,894 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 77 transitions. [2024-11-27 23:26:58,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-11-27 23:26:58,900 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:26:58,900 INFO L218 NwaCegarLoop]: trace histogram [8, 8, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:26:58,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-27 23:26:59,100 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:26:59,101 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:26:59,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:26:59,102 INFO L85 PathProgramCache]: Analyzing trace with hash 244570622, now seen corresponding path program 2 times [2024-11-27 23:26:59,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:26:59,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093004722] [2024-11-27 23:26:59,103 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:26:59,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:26:59,120 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:26:59,121 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:26:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 7 proven. 40 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2024-11-27 23:26:59,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:26:59,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093004722] [2024-11-27 23:26:59,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093004722] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:26:59,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137463995] [2024-11-27 23:26:59,193 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:26:59,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:26:59,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:26:59,195 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:26:59,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 23:26:59,268 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:26:59,268 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:26:59,269 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 23:26:59,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:26:59,320 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-27 23:26:59,320 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:26:59,539 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 4 proven. 49 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-27 23:26:59,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137463995] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:26:59,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:26:59,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 10 [2024-11-27 23:26:59,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129512184] [2024-11-27 23:26:59,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:26:59,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 23:26:59,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:26:59,541 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 23:26:59,542 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:26:59,542 INFO L87 Difference]: Start difference. First operand 50 states and 77 transitions. Second operand has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 10 states have internal predecessors, (34), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-27 23:26:59,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:26:59,679 INFO L93 Difference]: Finished difference Result 79 states and 124 transitions. [2024-11-27 23:26:59,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 23:26:59,680 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 10 states have internal predecessors, (34), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2024-11-27 23:26:59,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:26:59,681 INFO L225 Difference]: With dead ends: 79 [2024-11-27 23:26:59,681 INFO L226 Difference]: Without dead ends: 26 [2024-11-27 23:26:59,682 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2024-11-27 23:26:59,682 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:26:59,682 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 86 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:26:59,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-27 23:26:59,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-27 23:26:59,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2024-11-27 23:26:59,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-11-27 23:26:59,694 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 61 [2024-11-27 23:26:59,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:26:59,694 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-11-27 23:26:59,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 10 states have internal predecessors, (34), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2024-11-27 23:26:59,694 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-11-27 23:26:59,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-27 23:26:59,700 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:26:59,700 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:26:59,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-27 23:26:59,900 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:26:59,900 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:26:59,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:26:59,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1241549144, now seen corresponding path program 5 times [2024-11-27 23:26:59,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:26:59,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895770781] [2024-11-27 23:26:59,901 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:26:59,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:26:59,924 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-27 23:26:59,925 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:27:00,911 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 20 proven. 79 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-27 23:27:00,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:27:00,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895770781] [2024-11-27 23:27:00,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895770781] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:27:00,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639966765] [2024-11-27 23:27:00,911 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:27:00,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:27:00,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:27:00,913 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:27:00,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 23:27:00,973 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-11-27 23:27:00,974 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:27:00,976 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-11-27 23:27:00,978 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:27:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 3 proven. 61 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-11-27 23:27:01,589 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:27:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 20 proven. 80 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-27 23:27:03,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639966765] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:27:03,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:27:03,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 16, 24] total 56 [2024-11-27 23:27:03,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415441335] [2024-11-27 23:27:03,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:27:03,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-27 23:27:03,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:27:03,217 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-27 23:27:03,218 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=2861, Unknown=0, NotChecked=0, Total=3080 [2024-11-27 23:27:03,219 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 56 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 38 states have internal predecessors, (75), 13 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (19), 18 states have call predecessors, (19), 13 states have call successors, (19) [2024-11-27 23:27:04,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:27:04,787 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2024-11-27 23:27:04,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-27 23:27:04,787 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 38 states have internal predecessors, (75), 13 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (19), 18 states have call predecessors, (19), 13 states have call successors, (19) Word has length 55 [2024-11-27 23:27:04,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:27:04,788 INFO L225 Difference]: With dead ends: 51 [2024-11-27 23:27:04,788 INFO L226 Difference]: Without dead ends: 40 [2024-11-27 23:27:04,793 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=644, Invalid=5676, Unknown=0, NotChecked=0, Total=6320 [2024-11-27 23:27:04,794 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 1087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-27 23:27:04,794 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 318 Invalid, 1087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-27 23:27:04,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-11-27 23:27:04,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2024-11-27 23:27:04,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2024-11-27 23:27:04,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2024-11-27 23:27:04,811 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 55 [2024-11-27 23:27:04,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:27:04,811 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2024-11-27 23:27:04,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 38 states have internal predecessors, (75), 13 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (19), 18 states have call predecessors, (19), 13 states have call successors, (19) [2024-11-27 23:27:04,811 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2024-11-27 23:27:04,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-27 23:27:04,812 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:27:04,812 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:27:04,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-27 23:27:05,018 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-27 23:27:05,018 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:27:05,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:27:05,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1356577930, now seen corresponding path program 6 times [2024-11-27 23:27:05,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:27:05,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297064504] [2024-11-27 23:27:05,019 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:27:05,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:27:05,062 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-11-27 23:27:05,062 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:27:06,291 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 11 proven. 149 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-27 23:27:06,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:27:06,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297064504] [2024-11-27 23:27:06,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297064504] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:27:06,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901066881] [2024-11-27 23:27:06,292 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:27:06,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:27:06,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:27:06,294 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:27:06,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 23:27:06,367 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-11-27 23:27:06,367 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:27:06,369 WARN L254 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-11-27 23:27:06,373 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:27:06,891 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 4 proven. 106 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-11-27 23:27:06,891 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:27:08,710 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 29 proven. 153 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-27 23:27:08,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901066881] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:27:08,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:27:08,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 18, 30] total 52 [2024-11-27 23:27:08,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74164197] [2024-11-27 23:27:08,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:27:08,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-27 23:27:08,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:27:08,712 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-27 23:27:08,713 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2434, Unknown=0, NotChecked=0, Total=2652 [2024-11-27 23:27:08,713 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 52 states, 47 states have (on average 1.6382978723404256) internal successors, (77), 36 states have internal predecessors, (77), 15 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (23), 16 states have call predecessors, (23), 15 states have call successors, (23) [2024-11-27 23:27:10,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:27:10,264 INFO L93 Difference]: Finished difference Result 61 states and 83 transitions. [2024-11-27 23:27:10,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-27 23:27:10,264 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 47 states have (on average 1.6382978723404256) internal successors, (77), 36 states have internal predecessors, (77), 15 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (23), 16 states have call predecessors, (23), 15 states have call successors, (23) Word has length 69 [2024-11-27 23:27:10,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:27:10,265 INFO L225 Difference]: With dead ends: 61 [2024-11-27 23:27:10,265 INFO L226 Difference]: Without dead ends: 49 [2024-11-27 23:27:10,270 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=739, Invalid=5423, Unknown=0, NotChecked=0, Total=6162 [2024-11-27 23:27:10,270 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 50 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-27 23:27:10,271 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 320 Invalid, 1124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-27 23:27:10,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-27 23:27:10,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2024-11-27 23:27:10,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 27 states have internal predecessors, (28), 5 states have call successors, (5), 2 states have call predecessors, (5), 6 states have return successors, (15), 8 states have call predecessors, (15), 5 states have call successors, (15) [2024-11-27 23:27:10,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2024-11-27 23:27:10,289 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 69 [2024-11-27 23:27:10,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:27:10,290 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2024-11-27 23:27:10,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 47 states have (on average 1.6382978723404256) internal successors, (77), 36 states have internal predecessors, (77), 15 states have call successors, (15), 1 states have call predecessors, (15), 9 states have return successors, (23), 16 states have call predecessors, (23), 15 states have call successors, (23) [2024-11-27 23:27:10,290 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2024-11-27 23:27:10,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-27 23:27:10,291 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:27:10,291 INFO L218 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:27:10,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-27 23:27:10,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:27:10,492 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:27:10,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:27:10,493 INFO L85 PathProgramCache]: Analyzing trace with hash 230391048, now seen corresponding path program 7 times [2024-11-27 23:27:10,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:27:10,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433534723] [2024-11-27 23:27:10,493 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:27:10,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:27:10,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:27:11,885 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-27 23:27:11,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:27:11,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433534723] [2024-11-27 23:27:11,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433534723] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:27:11,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180982498] [2024-11-27 23:27:11,885 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:27:11,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:27:11,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:27:11,888 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:27:11,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 23:27:11,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:27:11,961 WARN L254 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-11-27 23:27:11,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:27:13,050 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 5 proven. 108 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2024-11-27 23:27:13,050 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:27:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 26 proven. 156 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-27 23:27:15,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180982498] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:27:15,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:27:15,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 20, 30] total 71 [2024-11-27 23:27:15,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641967273] [2024-11-27 23:27:15,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:27:15,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-11-27 23:27:15,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:27:15,234 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-11-27 23:27:15,236 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=4727, Unknown=0, NotChecked=0, Total=4970 [2024-11-27 23:27:15,236 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 71 states, 66 states have (on average 1.5303030303030303) internal successors, (101), 47 states have internal predecessors, (101), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (25), 24 states have call predecessors, (25), 19 states have call successors, (25) [2024-11-27 23:27:17,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:27:17,065 INFO L93 Difference]: Finished difference Result 59 states and 78 transitions. [2024-11-27 23:27:17,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-27 23:27:17,066 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 66 states have (on average 1.5303030303030303) internal successors, (101), 47 states have internal predecessors, (101), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (25), 24 states have call predecessors, (25), 19 states have call successors, (25) Word has length 69 [2024-11-27 23:27:17,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:27:17,067 INFO L225 Difference]: With dead ends: 59 [2024-11-27 23:27:17,067 INFO L226 Difference]: Without dead ends: 52 [2024-11-27 23:27:17,070 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=778, Invalid=8342, Unknown=0, NotChecked=0, Total=9120 [2024-11-27 23:27:17,071 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 46 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 1412 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 1487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-27 23:27:17,071 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 502 Invalid, 1487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1412 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-27 23:27:17,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-27 23:27:17,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2024-11-27 23:27:17,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 7 states have return successors, (17), 9 states have call predecessors, (17), 5 states have call successors, (17) [2024-11-27 23:27:17,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2024-11-27 23:27:17,082 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 69 [2024-11-27 23:27:17,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:27:17,082 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2024-11-27 23:27:17,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 66 states have (on average 1.5303030303030303) internal successors, (101), 47 states have internal predecessors, (101), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (25), 24 states have call predecessors, (25), 19 states have call successors, (25) [2024-11-27 23:27:17,082 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2024-11-27 23:27:17,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-27 23:27:17,083 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:27:17,083 INFO L218 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:27:17,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-27 23:27:17,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:27:17,287 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:27:17,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:27:17,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1792410124, now seen corresponding path program 8 times [2024-11-27 23:27:17,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:27:17,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235998040] [2024-11-27 23:27:17,287 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:27:17,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:27:17,305 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:27:17,306 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:27:18,441 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 156 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2024-11-27 23:27:18,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:27:18,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235998040] [2024-11-27 23:27:18,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235998040] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:27:18,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592050028] [2024-11-27 23:27:18,442 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:27:18,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:27:18,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:27:18,446 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:27:18,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 23:27:18,513 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:27:18,513 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:27:18,517 WARN L254 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 121 conjuncts are in the unsatisfiable core [2024-11-27 23:27:18,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:27:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 6 proven. 136 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2024-11-27 23:27:19,046 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:27:21,101 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 29 proven. 203 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-27 23:27:21,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592050028] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:27:21,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:27:21,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22, 33] total 55 [2024-11-27 23:27:21,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734072186] [2024-11-27 23:27:21,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:27:21,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-27 23:27:21,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:27:21,103 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-27 23:27:21,104 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2735, Unknown=0, NotChecked=0, Total=2970 [2024-11-27 23:27:21,105 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 55 states, 51 states have (on average 1.588235294117647) internal successors, (81), 36 states have internal predecessors, (81), 14 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (27), 19 states have call predecessors, (27), 14 states have call successors, (27) [2024-11-27 23:27:22,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:27:22,410 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2024-11-27 23:27:22,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-27 23:27:22,411 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 51 states have (on average 1.588235294117647) internal successors, (81), 36 states have internal predecessors, (81), 14 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (27), 19 states have call predecessors, (27), 14 states have call successors, (27) Word has length 76 [2024-11-27 23:27:22,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:27:22,412 INFO L225 Difference]: With dead ends: 62 [2024-11-27 23:27:22,412 INFO L226 Difference]: Without dead ends: 55 [2024-11-27 23:27:22,414 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=709, Invalid=5771, Unknown=0, NotChecked=0, Total=6480 [2024-11-27 23:27:22,414 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 101 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-27 23:27:22,415 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 347 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-27 23:27:22,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-11-27 23:27:22,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2024-11-27 23:27:22,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 5 states have call successors, (5), 2 states have call predecessors, (5), 8 states have return successors, (19), 10 states have call predecessors, (19), 5 states have call successors, (19) [2024-11-27 23:27:22,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2024-11-27 23:27:22,437 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 76 [2024-11-27 23:27:22,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:27:22,437 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2024-11-27 23:27:22,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 51 states have (on average 1.588235294117647) internal successors, (81), 36 states have internal predecessors, (81), 14 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (27), 19 states have call predecessors, (27), 14 states have call successors, (27) [2024-11-27 23:27:22,438 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2024-11-27 23:27:22,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-11-27 23:27:22,439 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:27:22,440 INFO L218 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:27:22,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-27 23:27:22,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-27 23:27:22,644 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:27:22,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:27:22,644 INFO L85 PathProgramCache]: Analyzing trace with hash 403480760, now seen corresponding path program 9 times [2024-11-27 23:27:22,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:27:22,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164266095] [2024-11-27 23:27:22,645 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:27:22,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:27:22,661 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-27 23:27:22,661 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:27:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 12 proven. 87 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-27 23:27:23,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:27:23,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164266095] [2024-11-27 23:27:23,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164266095] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:27:23,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949148223] [2024-11-27 23:27:23,326 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:27:23,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:27:23,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:27:23,329 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:27:23,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 23:27:23,399 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-27 23:27:23,400 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:27:23,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-11-27 23:27:23,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:27:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 3 proven. 65 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-27 23:27:23,924 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:27:25,092 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-27 23:27:25,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949148223] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:27:25,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:27:25,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 18, 21] total 50 [2024-11-27 23:27:25,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096633040] [2024-11-27 23:27:25,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:27:25,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-27 23:27:25,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:27:25,094 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-27 23:27:25,095 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2282, Unknown=0, NotChecked=0, Total=2450 [2024-11-27 23:27:25,096 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 50 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 32 states have internal predecessors, (75), 12 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (18), 18 states have call predecessors, (18), 12 states have call successors, (18) [2024-11-27 23:27:26,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:27:26,306 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2024-11-27 23:27:26,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-27 23:27:26,306 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 32 states have internal predecessors, (75), 12 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (18), 18 states have call predecessors, (18), 12 states have call successors, (18) Word has length 55 [2024-11-27 23:27:26,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:27:26,307 INFO L225 Difference]: With dead ends: 65 [2024-11-27 23:27:26,307 INFO L226 Difference]: Without dead ends: 53 [2024-11-27 23:27:26,309 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=550, Invalid=4706, Unknown=0, NotChecked=0, Total=5256 [2024-11-27 23:27:26,309 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-27 23:27:26,310 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 263 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-27 23:27:26,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-27 23:27:26,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2024-11-27 23:27:26,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 5 states have call successors, (5), 2 states have call predecessors, (5), 8 states have return successors, (18), 10 states have call predecessors, (18), 5 states have call successors, (18) [2024-11-27 23:27:26,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2024-11-27 23:27:26,321 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 55 [2024-11-27 23:27:26,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:27:26,322 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2024-11-27 23:27:26,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 32 states have internal predecessors, (75), 12 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (18), 18 states have call predecessors, (18), 12 states have call successors, (18) [2024-11-27 23:27:26,322 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2024-11-27 23:27:26,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-11-27 23:27:26,323 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:27:26,323 INFO L218 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:27:26,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-27 23:27:26,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-27 23:27:26,527 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:27:26,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:27:26,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1119099064, now seen corresponding path program 10 times [2024-11-27 23:27:26,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:27:26,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948953537] [2024-11-27 23:27:26,528 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:27:26,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:27:26,546 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:27:26,547 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:27:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 48 proven. 194 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-27 23:27:28,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:27:28,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948953537] [2024-11-27 23:27:28,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948953537] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:27:28,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214567520] [2024-11-27 23:27:28,134 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:27:28,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:27:28,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:27:28,136 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:27:28,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 23:27:28,221 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:27:28,222 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:27:28,226 WARN L254 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-11-27 23:27:28,233 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:27:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 7 proven. 167 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2024-11-27 23:27:29,220 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:27:32,160 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 256 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-11-27 23:27:32,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214567520] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:27:32,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:27:32,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 24, 36] total 74 [2024-11-27 23:27:32,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465122899] [2024-11-27 23:27:32,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:27:32,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-11-27 23:27:32,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:27:32,163 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-11-27 23:27:32,164 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=5125, Unknown=0, NotChecked=0, Total=5402 [2024-11-27 23:27:32,165 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 74 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 45 states have internal predecessors, (99), 15 states have call successors, (15), 1 states have call predecessors, (15), 20 states have return successors, (31), 29 states have call predecessors, (31), 15 states have call successors, (31) [2024-11-27 23:27:34,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:27:34,164 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2024-11-27 23:27:34,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-27 23:27:34,164 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 45 states have internal predecessors, (99), 15 states have call successors, (15), 1 states have call predecessors, (15), 20 states have return successors, (31), 29 states have call predecessors, (31), 15 states have call successors, (31) Word has length 83 [2024-11-27 23:27:34,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:27:34,165 INFO L225 Difference]: With dead ends: 63 [2024-11-27 23:27:34,165 INFO L226 Difference]: Without dead ends: 56 [2024-11-27 23:27:34,168 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2313 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=803, Invalid=9297, Unknown=0, NotChecked=0, Total=10100 [2024-11-27 23:27:34,169 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 98 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 1624 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 1701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-27 23:27:34,169 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 509 Invalid, 1701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1624 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-27 23:27:34,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-11-27 23:27:34,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2024-11-27 23:27:34,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.0625) internal successors, (34), 33 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 9 states have return successors, (20), 11 states have call predecessors, (20), 5 states have call successors, (20) [2024-11-27 23:27:34,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2024-11-27 23:27:34,187 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 83 [2024-11-27 23:27:34,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:27:34,187 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2024-11-27 23:27:34,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 45 states have internal predecessors, (99), 15 states have call successors, (15), 1 states have call predecessors, (15), 20 states have return successors, (31), 29 states have call predecessors, (31), 15 states have call successors, (31) [2024-11-27 23:27:34,187 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2024-11-27 23:27:34,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-27 23:27:34,188 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:27:34,189 INFO L218 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:27:34,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-27 23:27:34,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-27 23:27:34,393 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:27:34,394 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:27:34,394 INFO L85 PathProgramCache]: Analyzing trace with hash -287264164, now seen corresponding path program 11 times [2024-11-27 23:27:34,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:27:34,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881350776] [2024-11-27 23:27:34,394 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:27:34,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:27:34,431 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-11-27 23:27:34,433 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:27:35,883 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 23 proven. 223 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2024-11-27 23:27:35,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:27:35,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881350776] [2024-11-27 23:27:35,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881350776] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:27:35,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645208118] [2024-11-27 23:27:35,883 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:27:35,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:27:35,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:27:35,885 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:27:35,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 23:27:35,975 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-11-27 23:27:35,975 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:27:35,978 WARN L254 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 145 conjuncts are in the unsatisfiable core [2024-11-27 23:27:35,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:27:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 17 proven. 193 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-27 23:27:37,158 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:27:40,789 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 315 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-11-27 23:27:40,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645208118] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:27:40,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:27:40,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 26, 39] total 80 [2024-11-27 23:27:40,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752027441] [2024-11-27 23:27:40,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:27:40,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-11-27 23:27:40,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:27:40,792 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-11-27 23:27:40,793 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=6019, Unknown=0, NotChecked=0, Total=6320 [2024-11-27 23:27:40,794 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 80 states, 76 states have (on average 1.4605263157894737) internal successors, (111), 48 states have internal predecessors, (111), 16 states have call successors, (16), 1 states have call predecessors, (16), 22 states have return successors, (33), 32 states have call predecessors, (33), 16 states have call successors, (33) [2024-11-27 23:27:43,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:27:43,146 INFO L93 Difference]: Finished difference Result 66 states and 87 transitions. [2024-11-27 23:27:43,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-27 23:27:43,146 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 76 states have (on average 1.4605263157894737) internal successors, (111), 48 states have internal predecessors, (111), 16 states have call successors, (16), 1 states have call predecessors, (16), 22 states have return successors, (33), 32 states have call predecessors, (33), 16 states have call successors, (33) Word has length 90 [2024-11-27 23:27:43,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:27:43,148 INFO L225 Difference]: With dead ends: 66 [2024-11-27 23:27:43,148 INFO L226 Difference]: Without dead ends: 59 [2024-11-27 23:27:43,150 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2521 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=896, Invalid=10876, Unknown=0, NotChecked=0, Total=11772 [2024-11-27 23:27:43,150 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 153 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 2035 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 2215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:27:43,151 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 668 Invalid, 2215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2035 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-27 23:27:43,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-11-27 23:27:43,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2024-11-27 23:27:43,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 35 states have internal predecessors, (36), 5 states have call successors, (5), 2 states have call predecessors, (5), 10 states have return successors, (22), 12 states have call predecessors, (22), 5 states have call successors, (22) [2024-11-27 23:27:43,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2024-11-27 23:27:43,163 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 90 [2024-11-27 23:27:43,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:27:43,163 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2024-11-27 23:27:43,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 76 states have (on average 1.4605263157894737) internal successors, (111), 48 states have internal predecessors, (111), 16 states have call successors, (16), 1 states have call predecessors, (16), 22 states have return successors, (33), 32 states have call predecessors, (33), 16 states have call successors, (33) [2024-11-27 23:27:43,164 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2024-11-27 23:27:43,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-11-27 23:27:43,164 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:27:43,164 INFO L218 NwaCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:27:43,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-27 23:27:43,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-27 23:27:43,365 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:27:43,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:27:43,365 INFO L85 PathProgramCache]: Analyzing trace with hash 960528734, now seen corresponding path program 12 times [2024-11-27 23:27:43,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:27:43,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840370296] [2024-11-27 23:27:43,366 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:27:43,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:27:43,418 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-11-27 23:27:43,418 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:27:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 69 proven. 582 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2024-11-27 23:27:46,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:27:46,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840370296] [2024-11-27 23:27:46,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840370296] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:27:46,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852780273] [2024-11-27 23:27:46,558 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:27:46,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:27:46,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:27:46,562 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:27:46,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 23:27:46,696 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-11-27 23:27:46,696 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:27:46,704 WARN L254 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 193 conjuncts are in the unsatisfiable core [2024-11-27 23:27:46,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:27:48,544 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 9 proven. 361 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2024-11-27 23:27:48,545 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:27:54,596 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 56 proven. 602 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-11-27 23:27:54,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852780273] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:27:54,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:27:54,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 28, 51] total 108 [2024-11-27 23:27:54,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227292065] [2024-11-27 23:27:54,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:27:54,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2024-11-27 23:27:54,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:27:54,599 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2024-11-27 23:27:54,600 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=11152, Unknown=0, NotChecked=0, Total=11556 [2024-11-27 23:27:54,601 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand has 108 states, 103 states have (on average 1.5728155339805825) internal successors, (162), 69 states have internal predecessors, (162), 30 states have call successors, (30), 1 states have call predecessors, (30), 27 states have return successors, (43), 39 states have call predecessors, (43), 30 states have call successors, (43) [2024-11-27 23:27:59,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:27:59,686 INFO L93 Difference]: Finished difference Result 77 states and 107 transitions. [2024-11-27 23:27:59,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-27 23:27:59,687 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 103 states have (on average 1.5728155339805825) internal successors, (162), 69 states have internal predecessors, (162), 30 states have call successors, (30), 1 states have call predecessors, (30), 27 states have return successors, (43), 39 states have call predecessors, (43), 30 states have call successors, (43) Word has length 118 [2024-11-27 23:27:59,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:27:59,690 INFO L225 Difference]: With dead ends: 77 [2024-11-27 23:27:59,690 INFO L226 Difference]: Without dead ends: 62 [2024-11-27 23:27:59,694 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5219 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1842, Invalid=19914, Unknown=0, NotChecked=0, Total=21756 [2024-11-27 23:27:59,694 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 196 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 3598 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 3810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 3598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:27:59,696 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 857 Invalid, 3810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 3598 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-11-27 23:27:59,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-11-27 23:27:59,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2024-11-27 23:27:59,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 11 states have return successors, (24), 13 states have call predecessors, (24), 5 states have call successors, (24) [2024-11-27 23:27:59,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2024-11-27 23:27:59,712 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 118 [2024-11-27 23:27:59,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:27:59,713 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2024-11-27 23:27:59,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 103 states have (on average 1.5728155339805825) internal successors, (162), 69 states have internal predecessors, (162), 30 states have call successors, (30), 1 states have call predecessors, (30), 27 states have return successors, (43), 39 states have call predecessors, (43), 30 states have call successors, (43) [2024-11-27 23:27:59,714 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2024-11-27 23:27:59,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-27 23:27:59,715 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:27:59,715 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:27:59,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-27 23:27:59,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-27 23:27:59,916 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:27:59,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:27:59,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1817590444, now seen corresponding path program 13 times [2024-11-27 23:27:59,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:27:59,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490196097] [2024-11-27 23:27:59,917 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:27:59,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:27:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 492 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-11-27 23:28:02,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:02,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490196097] [2024-11-27 23:28:02,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490196097] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:02,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258784995] [2024-11-27 23:28:02,479 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:28:02,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:02,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:02,481 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:02,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 23:28:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:28:02,592 WARN L254 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 169 conjuncts are in the unsatisfiable core [2024-11-27 23:28:02,595 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:04,657 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 10 proven. 278 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2024-11-27 23:28:04,657 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:28:09,846 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 41 proven. 451 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-11-27 23:28:09,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258784995] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:28:09,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:28:09,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 30, 45] total 106 [2024-11-27 23:28:09,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726562908] [2024-11-27 23:28:09,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:28:09,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2024-11-27 23:28:09,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:09,849 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2024-11-27 23:28:09,850 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=10767, Unknown=0, NotChecked=0, Total=11130 [2024-11-27 23:28:09,851 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 106 states, 101 states have (on average 1.5445544554455446) internal successors, (156), 67 states have internal predecessors, (156), 29 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (40), 39 states have call predecessors, (40), 29 states have call successors, (40) [2024-11-27 23:28:13,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:28:13,365 INFO L93 Difference]: Finished difference Result 72 states and 95 transitions. [2024-11-27 23:28:13,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-27 23:28:13,366 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 101 states have (on average 1.5445544554455446) internal successors, (156), 67 states have internal predecessors, (156), 29 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (40), 39 states have call predecessors, (40), 29 states have call successors, (40) Word has length 104 [2024-11-27 23:28:13,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:28:13,367 INFO L225 Difference]: With dead ends: 72 [2024-11-27 23:28:13,367 INFO L226 Difference]: Without dead ends: 65 [2024-11-27 23:28:13,369 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3973 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1374, Invalid=18086, Unknown=0, NotChecked=0, Total=19460 [2024-11-27 23:28:13,370 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 165 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 2792 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 3148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 2792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-11-27 23:28:13,370 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 909 Invalid, 3148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 2792 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-11-27 23:28:13,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-11-27 23:28:13,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2024-11-27 23:28:13,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 39 states have internal predecessors, (40), 5 states have call successors, (5), 2 states have call predecessors, (5), 12 states have return successors, (26), 14 states have call predecessors, (26), 5 states have call successors, (26) [2024-11-27 23:28:13,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2024-11-27 23:28:13,386 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 104 [2024-11-27 23:28:13,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:28:13,388 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2024-11-27 23:28:13,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 101 states have (on average 1.5445544554455446) internal successors, (156), 67 states have internal predecessors, (156), 29 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (40), 39 states have call predecessors, (40), 29 states have call successors, (40) [2024-11-27 23:28:13,388 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2024-11-27 23:28:13,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-11-27 23:28:13,390 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:28:13,390 INFO L218 NwaCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:13,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-27 23:28:13,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-27 23:28:13,591 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:28:13,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:13,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1447362104, now seen corresponding path program 14 times [2024-11-27 23:28:13,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:13,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793604066] [2024-11-27 23:28:13,591 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:28:13,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:13,639 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:28:13,640 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:28:17,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 2 proven. 954 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2024-11-27 23:28:17,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:17,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793604066] [2024-11-27 23:28:17,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793604066] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:17,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415364426] [2024-11-27 23:28:17,858 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:28:17,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:17,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:17,862 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:17,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-27 23:28:18,027 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:28:18,028 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:28:18,035 WARN L254 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 229 conjuncts are in the unsatisfiable core [2024-11-27 23:28:18,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:21,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 11 proven. 515 refuted. 0 times theorem prover too weak. 601 trivial. 0 not checked. [2024-11-27 23:28:21,065 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:28:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1127 backedges. 68 proven. 884 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2024-11-27 23:28:29,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415364426] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:28:29,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:28:29,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 32, 60] total 137 [2024-11-27 23:28:29,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475145338] [2024-11-27 23:28:29,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:28:29,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2024-11-27 23:28:29,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:29,855 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2024-11-27 23:28:29,856 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=18141, Unknown=0, NotChecked=0, Total=18632 [2024-11-27 23:28:29,857 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 137 states, 132 states have (on average 1.5833333333333333) internal successors, (209), 87 states have internal predecessors, (209), 39 states have call successors, (39), 1 states have call predecessors, (39), 36 states have return successors, (51), 50 states have call predecessors, (51), 39 states have call successors, (51) [2024-11-27 23:28:37,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:28:37,063 INFO L93 Difference]: Finished difference Result 85 states and 119 transitions. [2024-11-27 23:28:37,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-27 23:28:37,063 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 132 states have (on average 1.5833333333333333) internal successors, (209), 87 states have internal predecessors, (209), 39 states have call successors, (39), 1 states have call predecessors, (39), 36 states have return successors, (51), 50 states have call predecessors, (51), 39 states have call successors, (51) Word has length 139 [2024-11-27 23:28:37,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:28:37,065 INFO L225 Difference]: With dead ends: 85 [2024-11-27 23:28:37,065 INFO L226 Difference]: Without dead ends: 68 [2024-11-27 23:28:37,068 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6465 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=2445, Invalid=30861, Unknown=0, NotChecked=0, Total=33306 [2024-11-27 23:28:37,069 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 257 mSDsluCounter, 1544 mSDsCounter, 0 mSdLazyCounter, 5789 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 6188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 5789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-27 23:28:37,069 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 1569 Invalid, 6188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 5789 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-27 23:28:37,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-27 23:28:37,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2024-11-27 23:28:37,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 40 states have (on average 1.05) internal successors, (42), 41 states have internal predecessors, (42), 5 states have call successors, (5), 2 states have call predecessors, (5), 13 states have return successors, (28), 15 states have call predecessors, (28), 5 states have call successors, (28) [2024-11-27 23:28:37,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2024-11-27 23:28:37,086 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 139 [2024-11-27 23:28:37,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:28:37,087 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2024-11-27 23:28:37,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 132 states have (on average 1.5833333333333333) internal successors, (209), 87 states have internal predecessors, (209), 39 states have call successors, (39), 1 states have call predecessors, (39), 36 states have return successors, (51), 50 states have call predecessors, (51), 39 states have call successors, (51) [2024-11-27 23:28:37,087 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2024-11-27 23:28:37,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-11-27 23:28:37,088 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:28:37,088 INFO L218 NwaCegarLoop]: trace histogram [21, 21, 21, 19, 19, 19, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:28:37,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-27 23:28:37,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-27 23:28:37,289 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:28:37,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:28:37,289 INFO L85 PathProgramCache]: Analyzing trace with hash 626974934, now seen corresponding path program 15 times [2024-11-27 23:28:37,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:28:37,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480521536] [2024-11-27 23:28:37,290 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:28:37,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:28:37,396 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2024-11-27 23:28:37,396 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:28:41,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 242 proven. 855 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2024-11-27 23:28:41,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:28:41,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480521536] [2024-11-27 23:28:41,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480521536] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:28:41,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309047234] [2024-11-27 23:28:41,750 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:28:41,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:28:41,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:28:41,753 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:28:41,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-27 23:28:41,966 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2024-11-27 23:28:41,966 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:28:41,971 WARN L254 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 253 conjuncts are in the unsatisfiable core [2024-11-27 23:28:41,977 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:28:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 12 proven. 632 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2024-11-27 23:28:44,824 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:28:54,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 77 proven. 1101 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2024-11-27 23:28:54,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309047234] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:28:54,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:28:54,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 34, 66] total 138 [2024-11-27 23:28:54,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488442527] [2024-11-27 23:28:54,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:28:54,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2024-11-27 23:28:54,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:28:54,528 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2024-11-27 23:28:54,529 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=18334, Unknown=0, NotChecked=0, Total=18906 [2024-11-27 23:28:54,530 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand has 138 states, 134 states have (on average 1.537313432835821) internal successors, (206), 85 states have internal predecessors, (206), 35 states have call successors, (35), 1 states have call predecessors, (35), 40 states have return successors, (55), 53 states have call predecessors, (55), 35 states have call successors, (55) [2024-11-27 23:29:01,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:29:01,424 INFO L93 Difference]: Finished difference Result 89 states and 125 transitions. [2024-11-27 23:29:01,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-27 23:29:01,425 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 134 states have (on average 1.537313432835821) internal successors, (206), 85 states have internal predecessors, (206), 35 states have call successors, (35), 1 states have call predecessors, (35), 40 states have return successors, (55), 53 states have call predecessors, (55), 35 states have call successors, (55) Word has length 153 [2024-11-27 23:29:01,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:29:01,426 INFO L225 Difference]: With dead ends: 89 [2024-11-27 23:29:01,426 INFO L226 Difference]: Without dead ends: 71 [2024-11-27 23:29:01,430 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7868 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=2443, Invalid=31967, Unknown=0, NotChecked=0, Total=34410 [2024-11-27 23:29:01,430 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 227 mSDsluCounter, 1493 mSDsCounter, 0 mSdLazyCounter, 6148 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1519 SdHoareTripleChecker+Invalid, 6438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 6148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2024-11-27 23:29:01,430 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 1519 Invalid, 6438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 6148 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2024-11-27 23:29:01,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-11-27 23:29:01,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2024-11-27 23:29:01,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 43 states have internal predecessors, (44), 5 states have call successors, (5), 2 states have call predecessors, (5), 14 states have return successors, (30), 16 states have call predecessors, (30), 5 states have call successors, (30) [2024-11-27 23:29:01,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2024-11-27 23:29:01,443 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 153 [2024-11-27 23:29:01,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:29:01,443 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2024-11-27 23:29:01,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 134 states have (on average 1.537313432835821) internal successors, (206), 85 states have internal predecessors, (206), 35 states have call successors, (35), 1 states have call predecessors, (35), 40 states have return successors, (55), 53 states have call predecessors, (55), 35 states have call successors, (55) [2024-11-27 23:29:01,444 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2024-11-27 23:29:01,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-11-27 23:29:01,446 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:29:01,446 INFO L218 NwaCegarLoop]: trace histogram [23, 23, 23, 21, 21, 21, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:29:01,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-27 23:29:01,646 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:29:01,647 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:29:01,647 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:29:01,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1673274616, now seen corresponding path program 16 times [2024-11-27 23:29:01,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:29:01,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319237413] [2024-11-27 23:29:01,647 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:29:01,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:29:01,681 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:29:01,681 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:29:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 66 proven. 848 refuted. 0 times theorem prover too weak. 771 trivial. 0 not checked. [2024-11-27 23:29:06,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:29:06,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319237413] [2024-11-27 23:29:06,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319237413] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:29:06,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433402428] [2024-11-27 23:29:06,786 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:29:06,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:29:06,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:29:06,789 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:29:06,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-27 23:29:06,974 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:29:06,974 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:29:06,979 WARN L254 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 277 conjuncts are in the unsatisfiable core [2024-11-27 23:29:06,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:29:09,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 13 proven. 761 refuted. 0 times theorem prover too weak. 911 trivial. 0 not checked. [2024-11-27 23:29:09,930 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:29:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1685 backedges. 86 proven. 1342 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2024-11-27 23:29:22,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433402428] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:29:22,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:29:22,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 36, 72] total 142 [2024-11-27 23:29:22,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340097225] [2024-11-27 23:29:22,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:29:22,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2024-11-27 23:29:22,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:29:22,346 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2024-11-27 23:29:22,348 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=19447, Unknown=0, NotChecked=0, Total=20022 [2024-11-27 23:29:22,348 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 142 states, 138 states have (on average 1.3840579710144927) internal successors, (191), 82 states have internal predecessors, (191), 27 states have call successors, (27), 1 states have call predecessors, (27), 45 states have return successors, (61), 60 states have call predecessors, (61), 27 states have call successors, (61) [2024-11-27 23:29:32,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:29:32,213 INFO L93 Difference]: Finished difference Result 93 states and 131 transitions. [2024-11-27 23:29:32,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-27 23:29:32,213 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 138 states have (on average 1.3840579710144927) internal successors, (191), 82 states have internal predecessors, (191), 27 states have call successors, (27), 1 states have call predecessors, (27), 45 states have return successors, (61), 60 states have call predecessors, (61), 27 states have call successors, (61) Word has length 167 [2024-11-27 23:29:32,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:29:32,214 INFO L225 Difference]: With dead ends: 93 [2024-11-27 23:29:32,214 INFO L226 Difference]: Without dead ends: 74 [2024-11-27 23:29:32,218 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7682 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=2354, Invalid=34702, Unknown=0, NotChecked=0, Total=37056 [2024-11-27 23:29:32,218 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 226 mSDsluCounter, 1680 mSDsCounter, 0 mSdLazyCounter, 7553 mSolverCounterSat, 336 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 1706 SdHoareTripleChecker+Invalid, 7889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 336 IncrementalHoareTripleChecker+Valid, 7553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-11-27 23:29:32,219 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 1706 Invalid, 7889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [336 Valid, 7553 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2024-11-27 23:29:32,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-27 23:29:32,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2024-11-27 23:29:32,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 45 states have internal predecessors, (46), 5 states have call successors, (5), 2 states have call predecessors, (5), 15 states have return successors, (32), 17 states have call predecessors, (32), 5 states have call successors, (32) [2024-11-27 23:29:32,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 83 transitions. [2024-11-27 23:29:32,237 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 83 transitions. Word has length 167 [2024-11-27 23:29:32,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:29:32,238 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 83 transitions. [2024-11-27 23:29:32,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 138 states have (on average 1.3840579710144927) internal successors, (191), 82 states have internal predecessors, (191), 27 states have call successors, (27), 1 states have call predecessors, (27), 45 states have return successors, (61), 60 states have call predecessors, (61), 27 states have call successors, (61) [2024-11-27 23:29:32,238 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 83 transitions. [2024-11-27 23:29:32,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2024-11-27 23:29:32,241 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:29:32,241 INFO L218 NwaCegarLoop]: trace histogram [25, 25, 25, 23, 23, 23, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:29:32,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-27 23:29:32,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:29:32,442 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:29:32,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:29:32,442 INFO L85 PathProgramCache]: Analyzing trace with hash 2078594230, now seen corresponding path program 17 times [2024-11-27 23:29:32,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:29:32,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033794972] [2024-11-27 23:29:32,443 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:29:32,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:29:32,492 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2024-11-27 23:29:32,492 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:29:38,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2006 backedges. 377 proven. 1095 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2024-11-27 23:29:38,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:29:38,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033794972] [2024-11-27 23:29:38,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033794972] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:29:38,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128468907] [2024-11-27 23:29:38,014 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:29:38,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:29:38,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:29:38,017 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:29:38,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-27 23:29:38,264 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2024-11-27 23:29:38,265 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:29:38,276 WARN L254 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 301 conjuncts are in the unsatisfiable core [2024-11-27 23:29:38,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:29:41,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2006 backedges. 14 proven. 902 refuted. 0 times theorem prover too weak. 1090 trivial. 0 not checked. [2024-11-27 23:29:41,807 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:29:57,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2006 backedges. 95 proven. 1607 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2024-11-27 23:29:57,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128468907] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:29:57,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:29:57,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 38, 78] total 164 [2024-11-27 23:29:57,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426892240] [2024-11-27 23:29:57,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:29:57,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2024-11-27 23:29:57,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:29:57,012 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2024-11-27 23:29:57,015 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=26049, Unknown=0, NotChecked=0, Total=26732 [2024-11-27 23:29:57,016 INFO L87 Difference]: Start difference. First operand 65 states and 83 transitions. Second operand has 164 states, 159 states have (on average 1.471698113207547) internal successors, (234), 99 states have internal predecessors, (234), 38 states have call successors, (38), 1 states have call predecessors, (38), 49 states have return successors, (66), 65 states have call predecessors, (66), 38 states have call successors, (66) [2024-11-27 23:30:07,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:30:07,620 INFO L93 Difference]: Finished difference Result 97 states and 137 transitions. [2024-11-27 23:30:07,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-11-27 23:30:07,621 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 159 states have (on average 1.471698113207547) internal successors, (234), 99 states have internal predecessors, (234), 38 states have call successors, (38), 1 states have call predecessors, (38), 49 states have return successors, (66), 65 states have call predecessors, (66), 38 states have call successors, (66) Word has length 181 [2024-11-27 23:30:07,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:30:07,623 INFO L225 Difference]: With dead ends: 97 [2024-11-27 23:30:07,623 INFO L226 Difference]: Without dead ends: 77 [2024-11-27 23:30:07,627 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10049 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=3048, Invalid=44258, Unknown=0, NotChecked=0, Total=47306 [2024-11-27 23:30:07,627 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 277 mSDsluCounter, 1952 mSDsCounter, 0 mSdLazyCounter, 8254 mSolverCounterSat, 461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 1978 SdHoareTripleChecker+Invalid, 8715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 8254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2024-11-27 23:30:07,627 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 1978 Invalid, 8715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [461 Valid, 8254 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2024-11-27 23:30:07,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-11-27 23:30:07,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2024-11-27 23:30:07,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 47 states have internal predecessors, (48), 5 states have call successors, (5), 2 states have call predecessors, (5), 16 states have return successors, (34), 18 states have call predecessors, (34), 5 states have call successors, (34) [2024-11-27 23:30:07,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2024-11-27 23:30:07,650 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 181 [2024-11-27 23:30:07,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:30:07,650 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2024-11-27 23:30:07,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 159 states have (on average 1.471698113207547) internal successors, (234), 99 states have internal predecessors, (234), 38 states have call successors, (38), 1 states have call predecessors, (38), 49 states have return successors, (66), 65 states have call predecessors, (66), 38 states have call successors, (66) [2024-11-27 23:30:07,651 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2024-11-27 23:30:07,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2024-11-27 23:30:07,654 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:30:07,654 INFO L218 NwaCegarLoop]: trace histogram [27, 27, 27, 25, 25, 25, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:30:07,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-27 23:30:07,858 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-27 23:30:07,858 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:30:07,859 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:30:07,859 INFO L85 PathProgramCache]: Analyzing trace with hash 2055455672, now seen corresponding path program 18 times [2024-11-27 23:30:07,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:30:07,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174547702] [2024-11-27 23:30:07,859 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:30:07,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:30:07,959 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2024-11-27 23:30:07,960 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:30:15,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 338 proven. 1603 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2024-11-27 23:30:15,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:30:15,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174547702] [2024-11-27 23:30:15,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174547702] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:30:15,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92635940] [2024-11-27 23:30:15,313 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:30:15,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:30:15,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:30:15,316 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:30:15,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-27 23:30:15,633 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2024-11-27 23:30:15,633 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:30:15,641 WARN L254 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 325 conjuncts are in the unsatisfiable core [2024-11-27 23:30:15,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:30:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 15 proven. 1055 refuted. 0 times theorem prover too weak. 1285 trivial. 0 not checked. [2024-11-27 23:30:20,009 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:30:35,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 104 proven. 1896 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2024-11-27 23:30:35,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92635940] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:30:35,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:30:35,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 40, 84] total 178 [2024-11-27 23:30:35,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319820378] [2024-11-27 23:30:35,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:30:35,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 178 states [2024-11-27 23:30:35,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:30:35,851 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2024-11-27 23:30:35,854 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=30838, Unknown=0, NotChecked=0, Total=31506 [2024-11-27 23:30:35,855 INFO L87 Difference]: Start difference. First operand 68 states and 87 transitions. Second operand has 178 states, 173 states have (on average 1.5491329479768785) internal successors, (268), 110 states have internal predecessors, (268), 48 states have call successors, (48), 1 states have call predecessors, (48), 50 states have return successors, (71), 68 states have call predecessors, (71), 48 states have call successors, (71) [2024-11-27 23:30:47,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:30:47,037 INFO L93 Difference]: Finished difference Result 101 states and 143 transitions. [2024-11-27 23:30:47,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-11-27 23:30:47,038 INFO L78 Accepts]: Start accepts. Automaton has has 178 states, 173 states have (on average 1.5491329479768785) internal successors, (268), 110 states have internal predecessors, (268), 48 states have call successors, (48), 1 states have call predecessors, (48), 50 states have return successors, (71), 68 states have call predecessors, (71), 48 states have call successors, (71) Word has length 195 [2024-11-27 23:30:47,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:30:47,039 INFO L225 Difference]: With dead ends: 101 [2024-11-27 23:30:47,039 INFO L226 Difference]: Without dead ends: 80 [2024-11-27 23:30:47,044 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12105 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=3653, Invalid=51807, Unknown=0, NotChecked=0, Total=55460 [2024-11-27 23:30:47,049 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 462 mSDsluCounter, 2295 mSDsCounter, 0 mSdLazyCounter, 9486 mSolverCounterSat, 887 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 2324 SdHoareTripleChecker+Invalid, 10373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 887 IncrementalHoareTripleChecker+Valid, 9486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:30:47,049 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [464 Valid, 2324 Invalid, 10373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [887 Valid, 9486 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2024-11-27 23:30:47,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-27 23:30:47,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 71. [2024-11-27 23:30:47,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 49 states have internal predecessors, (50), 5 states have call successors, (5), 2 states have call predecessors, (5), 17 states have return successors, (36), 19 states have call predecessors, (36), 5 states have call successors, (36) [2024-11-27 23:30:47,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 91 transitions. [2024-11-27 23:30:47,075 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 91 transitions. Word has length 195 [2024-11-27 23:30:47,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:30:47,076 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 91 transitions. [2024-11-27 23:30:47,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 178 states, 173 states have (on average 1.5491329479768785) internal successors, (268), 110 states have internal predecessors, (268), 48 states have call successors, (48), 1 states have call predecessors, (48), 50 states have return successors, (71), 68 states have call predecessors, (71), 48 states have call successors, (71) [2024-11-27 23:30:47,076 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 91 transitions. [2024-11-27 23:30:47,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2024-11-27 23:30:47,082 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:30:47,082 INFO L218 NwaCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:30:47,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-27 23:30:47,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:30:47,283 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:30:47,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:30:47,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1573249948, now seen corresponding path program 19 times [2024-11-27 23:30:47,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:30:47,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998468662] [2024-11-27 23:30:47,283 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:30:47,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:30:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:30:50,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 0 proven. 1062 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2024-11-27 23:30:50,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:30:50,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998468662] [2024-11-27 23:30:50,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998468662] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:30:50,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161055143] [2024-11-27 23:30:50,964 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:30:50,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:30:50,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:30:50,966 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:30:50,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-27 23:30:51,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:30:51,208 WARN L254 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 241 conjuncts are in the unsatisfiable core [2024-11-27 23:30:51,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:30:55,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 16 proven. 581 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2024-11-27 23:30:55,157 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:31:05,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1256 backedges. 59 proven. 1003 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2024-11-27 23:31:05,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161055143] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:31:05,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:31:05,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 42, 63] total 148 [2024-11-27 23:31:05,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562974455] [2024-11-27 23:31:05,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:31:05,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2024-11-27 23:31:05,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:31:05,617 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2024-11-27 23:31:05,619 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=507, Invalid=21249, Unknown=0, NotChecked=0, Total=21756 [2024-11-27 23:31:05,619 INFO L87 Difference]: Start difference. First operand 71 states and 91 transitions. Second operand has 148 states, 143 states have (on average 1.5524475524475525) internal successors, (222), 91 states have internal predecessors, (222), 41 states have call successors, (41), 1 states have call predecessors, (41), 38 states have return successors, (58), 57 states have call predecessors, (58), 41 states have call successors, (58) [2024-11-27 23:31:13,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:31:13,018 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2024-11-27 23:31:13,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-27 23:31:13,019 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 143 states have (on average 1.5524475524475525) internal successors, (222), 91 states have internal predecessors, (222), 41 states have call successors, (41), 1 states have call predecessors, (41), 38 states have return successors, (58), 57 states have call predecessors, (58), 41 states have call successors, (58) Word has length 146 [2024-11-27 23:31:13,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:31:13,020 INFO L225 Difference]: With dead ends: 90 [2024-11-27 23:31:13,020 INFO L226 Difference]: Without dead ends: 83 [2024-11-27 23:31:13,025 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7729 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=2292, Invalid=35150, Unknown=0, NotChecked=0, Total=37442 [2024-11-27 23:31:13,025 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 347 mSDsluCounter, 1837 mSDsCounter, 0 mSdLazyCounter, 5613 mSolverCounterSat, 807 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 1865 SdHoareTripleChecker+Invalid, 6420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 807 IncrementalHoareTripleChecker+Valid, 5613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-11-27 23:31:13,026 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 1865 Invalid, 6420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [807 Valid, 5613 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-11-27 23:31:13,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-27 23:31:13,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2024-11-27 23:31:13,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.04) internal successors, (52), 51 states have internal predecessors, (52), 5 states have call successors, (5), 2 states have call predecessors, (5), 18 states have return successors, (38), 20 states have call predecessors, (38), 5 states have call successors, (38) [2024-11-27 23:31:13,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2024-11-27 23:31:13,040 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 146 [2024-11-27 23:31:13,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:31:13,040 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2024-11-27 23:31:13,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 143 states have (on average 1.5524475524475525) internal successors, (222), 91 states have internal predecessors, (222), 41 states have call successors, (41), 1 states have call predecessors, (41), 38 states have return successors, (58), 57 states have call predecessors, (58), 41 states have call successors, (58) [2024-11-27 23:31:13,041 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2024-11-27 23:31:13,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-11-27 23:31:13,042 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:31:13,042 INFO L218 NwaCegarLoop]: trace histogram [21, 21, 21, 19, 19, 19, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:31:13,049 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-27 23:31:13,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:31:13,243 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:31:13,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:31:13,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1925514456, now seen corresponding path program 20 times [2024-11-27 23:31:13,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:31:13,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816531665] [2024-11-27 23:31:13,244 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:31:13,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:31:13,292 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:31:13,292 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:31:17,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 2 proven. 1180 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-11-27 23:31:17,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:31:17,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816531665] [2024-11-27 23:31:17,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816531665] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:31:17,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291946869] [2024-11-27 23:31:17,712 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:31:17,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:31:17,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:31:17,714 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:31:17,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-27 23:31:17,971 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:31:17,972 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:31:17,976 WARN L254 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 253 conjuncts are in the unsatisfiable core [2024-11-27 23:31:17,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:31:22,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 17 proven. 643 refuted. 0 times theorem prover too weak. 732 trivial. 0 not checked. [2024-11-27 23:31:22,240 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:31:34,072 INFO L134 CoverageAnalysis]: Checked inductivity of 1392 backedges. 62 proven. 1117 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2024-11-27 23:31:34,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291946869] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:31:34,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:31:34,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 44, 66] total 156 [2024-11-27 23:31:34,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523134368] [2024-11-27 23:31:34,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:31:34,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2024-11-27 23:31:34,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:31:34,074 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2024-11-27 23:31:34,076 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=23642, Unknown=0, NotChecked=0, Total=24180 [2024-11-27 23:31:34,076 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand has 156 states, 151 states have (on average 1.5894039735099337) internal successors, (240), 96 states have internal predecessors, (240), 43 states have call successors, (43), 1 states have call predecessors, (43), 40 states have return successors, (61), 60 states have call predecessors, (61), 43 states have call successors, (61) [2024-11-27 23:31:42,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:31:42,174 INFO L93 Difference]: Finished difference Result 93 states and 123 transitions. [2024-11-27 23:31:42,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-27 23:31:42,174 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 151 states have (on average 1.5894039735099337) internal successors, (240), 96 states have internal predecessors, (240), 43 states have call successors, (43), 1 states have call predecessors, (43), 40 states have return successors, (61), 60 states have call predecessors, (61), 43 states have call successors, (61) Word has length 153 [2024-11-27 23:31:42,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:31:42,175 INFO L225 Difference]: With dead ends: 93 [2024-11-27 23:31:42,175 INFO L226 Difference]: Without dead ends: 86 [2024-11-27 23:31:42,178 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8524 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=2516, Invalid=38896, Unknown=0, NotChecked=0, Total=41412 [2024-11-27 23:31:42,179 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 389 mSDsluCounter, 2228 mSDsCounter, 0 mSdLazyCounter, 6649 mSolverCounterSat, 857 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 2256 SdHoareTripleChecker+Invalid, 7506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 857 IncrementalHoareTripleChecker+Valid, 6649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:31:42,179 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 2256 Invalid, 7506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [857 Valid, 6649 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2024-11-27 23:31:42,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-11-27 23:31:42,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 77. [2024-11-27 23:31:42,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 53 states have internal predecessors, (54), 5 states have call successors, (5), 2 states have call predecessors, (5), 19 states have return successors, (40), 21 states have call predecessors, (40), 5 states have call successors, (40) [2024-11-27 23:31:42,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 99 transitions. [2024-11-27 23:31:42,201 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 99 transitions. Word has length 153 [2024-11-27 23:31:42,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:31:42,201 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 99 transitions. [2024-11-27 23:31:42,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 151 states have (on average 1.5894039735099337) internal successors, (240), 96 states have internal predecessors, (240), 43 states have call successors, (43), 1 states have call predecessors, (43), 40 states have return successors, (61), 60 states have call predecessors, (61), 43 states have call successors, (61) [2024-11-27 23:31:42,202 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 99 transitions. [2024-11-27 23:31:42,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2024-11-27 23:31:42,204 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:31:42,204 INFO L218 NwaCegarLoop]: trace histogram [31, 31, 31, 29, 29, 29, 29, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:31:42,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-27 23:31:42,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-27 23:31:42,405 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:31:42,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:31:42,405 INFO L85 PathProgramCache]: Analyzing trace with hash 713177958, now seen corresponding path program 21 times [2024-11-27 23:31:42,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:31:42,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597091740] [2024-11-27 23:31:42,405 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:31:42,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:31:42,507 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 37 check-sat command(s) [2024-11-27 23:31:42,507 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:31:50,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3137 backedges. 576 proven. 1861 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2024-11-27 23:31:50,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:31:50,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597091740] [2024-11-27 23:31:50,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597091740] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:31:50,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542838608] [2024-11-27 23:31:50,404 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:31:50,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:31:50,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:31:50,406 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:31:50,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-27 23:31:50,820 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 37 check-sat command(s) [2024-11-27 23:31:50,820 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:31:50,828 WARN L254 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 373 conjuncts are in the unsatisfiable core [2024-11-27 23:31:50,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:31:55,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3137 backedges. 18 proven. 1399 refuted. 0 times theorem prover too weak. 1720 trivial. 0 not checked. [2024-11-27 23:31:55,771 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:32:15,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3137 backedges. 119 proven. 2549 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2024-11-27 23:32:15,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542838608] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:32:15,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:32:15,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 46, 96] total 199 [2024-11-27 23:32:15,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918035556] [2024-11-27 23:32:15,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:32:15,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 199 states [2024-11-27 23:32:15,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:32:15,262 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 199 interpolants. [2024-11-27 23:32:15,263 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=840, Invalid=38562, Unknown=0, NotChecked=0, Total=39402 [2024-11-27 23:32:15,264 INFO L87 Difference]: Start difference. First operand 77 states and 99 transitions. Second operand has 199 states, 195 states have (on average 1.523076923076923) internal successors, (297), 120 states have internal predecessors, (297), 50 states have call successors, (50), 1 states have call predecessors, (50), 60 states have return successors, (81), 79 states have call predecessors, (81), 50 states have call successors, (81) [2024-11-27 23:32:28,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:32:28,219 INFO L93 Difference]: Finished difference Result 113 states and 161 transitions. [2024-11-27 23:32:28,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-11-27 23:32:28,220 INFO L78 Accepts]: Start accepts. Automaton has has 199 states, 195 states have (on average 1.523076923076923) internal successors, (297), 120 states have internal predecessors, (297), 50 states have call successors, (50), 1 states have call predecessors, (50), 60 states have return successors, (81), 79 states have call predecessors, (81), 50 states have call successors, (81) Word has length 223 [2024-11-27 23:32:28,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:32:28,221 INFO L225 Difference]: With dead ends: 113 [2024-11-27 23:32:28,221 INFO L226 Difference]: Without dead ends: 89 [2024-11-27 23:32:28,229 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15899 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=4315, Invalid=65645, Unknown=0, NotChecked=0, Total=69960 [2024-11-27 23:32:28,229 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 477 mSDsluCounter, 2681 mSDsCounter, 0 mSdLazyCounter, 11478 mSolverCounterSat, 505 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 2713 SdHoareTripleChecker+Invalid, 11983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 505 IncrementalHoareTripleChecker+Valid, 11478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2024-11-27 23:32:28,230 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [499 Valid, 2713 Invalid, 11983 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [505 Valid, 11478 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2024-11-27 23:32:28,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-11-27 23:32:28,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2024-11-27 23:32:28,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 54 states have (on average 1.037037037037037) internal successors, (56), 55 states have internal predecessors, (56), 5 states have call successors, (5), 2 states have call predecessors, (5), 20 states have return successors, (42), 22 states have call predecessors, (42), 5 states have call successors, (42) [2024-11-27 23:32:28,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 103 transitions. [2024-11-27 23:32:28,255 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 103 transitions. Word has length 223 [2024-11-27 23:32:28,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:32:28,256 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 103 transitions. [2024-11-27 23:32:28,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 199 states, 195 states have (on average 1.523076923076923) internal successors, (297), 120 states have internal predecessors, (297), 50 states have call successors, (50), 1 states have call predecessors, (50), 60 states have return successors, (81), 79 states have call predecessors, (81), 50 states have call successors, (81) [2024-11-27 23:32:28,256 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 103 transitions. [2024-11-27 23:32:28,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2024-11-27 23:32:28,258 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:32:28,258 INFO L218 NwaCegarLoop]: trace histogram [33, 33, 33, 31, 31, 31, 31, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:32:28,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-27 23:32:28,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:28,459 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:32:28,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:32:28,461 INFO L85 PathProgramCache]: Analyzing trace with hash 605248040, now seen corresponding path program 22 times [2024-11-27 23:32:28,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:32:28,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021504543] [2024-11-27 23:32:28,462 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:32:28,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:32:28,496 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:32:28,496 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:32:36,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 98 proven. 1721 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2024-11-27 23:32:36,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:32:36,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021504543] [2024-11-27 23:32:36,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021504543] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:32:36,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277526737] [2024-11-27 23:32:36,104 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:32:36,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:32:36,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:32:36,106 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:32:36,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-27 23:32:36,453 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:32:36,453 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:32:36,460 WARN L254 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 397 conjuncts are in the unsatisfiable core [2024-11-27 23:32:36,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:32:41,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 19 proven. 1588 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2024-11-27 23:32:41,399 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:33:02,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 128 proven. 2910 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2024-11-27 23:33:02,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277526737] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:33:02,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:33:02,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 48, 102] total 198 [2024-11-27 23:33:02,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050971303] [2024-11-27 23:33:02,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:33:02,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 198 states [2024-11-27 23:33:02,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:33:02,697 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2024-11-27 23:33:02,700 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=813, Invalid=38193, Unknown=0, NotChecked=0, Total=39006 [2024-11-27 23:33:02,701 INFO L87 Difference]: Start difference. First operand 80 states and 103 transitions. Second operand has 198 states, 194 states have (on average 1.3762886597938144) internal successors, (267), 112 states have internal predecessors, (267), 37 states have call successors, (37), 1 states have call predecessors, (37), 65 states have return successors, (87), 86 states have call predecessors, (87), 37 states have call successors, (87) [2024-11-27 23:33:16,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:33:16,988 INFO L93 Difference]: Finished difference Result 117 states and 167 transitions. [2024-11-27 23:33:16,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-11-27 23:33:16,989 INFO L78 Accepts]: Start accepts. Automaton has has 198 states, 194 states have (on average 1.3762886597938144) internal successors, (267), 112 states have internal predecessors, (267), 37 states have call successors, (37), 1 states have call predecessors, (37), 65 states have return successors, (87), 86 states have call predecessors, (87), 37 states have call successors, (87) Word has length 237 [2024-11-27 23:33:16,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:33:16,990 INFO L225 Difference]: With dead ends: 117 [2024-11-27 23:33:16,990 INFO L226 Difference]: Without dead ends: 92 [2024-11-27 23:33:16,995 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 648 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14618 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=3932, Invalid=67090, Unknown=0, NotChecked=0, Total=71022 [2024-11-27 23:33:16,996 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 540 mSDsluCounter, 2737 mSDsCounter, 0 mSdLazyCounter, 12575 mSolverCounterSat, 524 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 2770 SdHoareTripleChecker+Invalid, 13099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 12575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:33:16,996 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 2770 Invalid, 13099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 12575 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2024-11-27 23:33:16,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-27 23:33:17,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2024-11-27 23:33:17,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 57 states have internal predecessors, (58), 5 states have call successors, (5), 2 states have call predecessors, (5), 21 states have return successors, (44), 23 states have call predecessors, (44), 5 states have call successors, (44) [2024-11-27 23:33:17,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 107 transitions. [2024-11-27 23:33:17,016 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 107 transitions. Word has length 237 [2024-11-27 23:33:17,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:33:17,016 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 107 transitions. [2024-11-27 23:33:17,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 198 states, 194 states have (on average 1.3762886597938144) internal successors, (267), 112 states have internal predecessors, (267), 37 states have call successors, (37), 1 states have call predecessors, (37), 65 states have return successors, (87), 86 states have call predecessors, (87), 37 states have call successors, (87) [2024-11-27 23:33:17,017 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 107 transitions. [2024-11-27 23:33:17,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2024-11-27 23:33:17,018 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:33:17,018 INFO L218 NwaCegarLoop]: trace histogram [24, 24, 24, 22, 22, 22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:33:17,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-27 23:33:17,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:33:17,218 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:33:17,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:33:17,219 INFO L85 PathProgramCache]: Analyzing trace with hash -464155588, now seen corresponding path program 23 times [2024-11-27 23:33:17,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:33:17,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344210289] [2024-11-27 23:33:17,219 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:33:17,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:33:17,266 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2024-11-27 23:33:17,267 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:33:21,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1842 backedges. 59 proven. 877 refuted. 0 times theorem prover too weak. 906 trivial. 0 not checked. [2024-11-27 23:33:21,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:33:21,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344210289] [2024-11-27 23:33:21,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344210289] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:33:21,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122472184] [2024-11-27 23:33:21,169 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:33:21,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:33:21,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:33:21,170 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:33:21,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-27 23:33:21,568 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2024-11-27 23:33:21,568 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:33:21,577 WARN L254 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 289 conjuncts are in the unsatisfiable core [2024-11-27 23:33:21,582 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:33:25,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1842 backedges. 41 proven. 823 refuted. 0 times theorem prover too weak. 978 trivial. 0 not checked. [2024-11-27 23:33:25,301 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:33:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1842 backedges. 72 proven. 1491 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2024-11-27 23:33:38,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122472184] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:33:38,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:33:38,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 50, 75] total 152 [2024-11-27 23:33:38,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929036383] [2024-11-27 23:33:38,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:33:38,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2024-11-27 23:33:38,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:33:38,604 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2024-11-27 23:33:38,605 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=22373, Unknown=0, NotChecked=0, Total=22952 [2024-11-27 23:33:38,606 INFO L87 Difference]: Start difference. First operand 83 states and 107 transitions. Second operand has 152 states, 148 states have (on average 1.3986486486486487) internal successors, (207), 84 states have internal predecessors, (207), 28 states have call successors, (28), 1 states have call predecessors, (28), 46 states have return successors, (69), 68 states have call predecessors, (69), 28 states have call successors, (69) [2024-11-27 23:33:48,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:33:48,495 INFO L93 Difference]: Finished difference Result 102 states and 135 transitions. [2024-11-27 23:33:48,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-27 23:33:48,496 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 148 states have (on average 1.3986486486486487) internal successors, (207), 84 states have internal predecessors, (207), 28 states have call successors, (28), 1 states have call predecessors, (28), 46 states have return successors, (69), 68 states have call predecessors, (69), 28 states have call successors, (69) Word has length 174 [2024-11-27 23:33:48,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:33:48,497 INFO L225 Difference]: With dead ends: 102 [2024-11-27 23:33:48,497 INFO L226 Difference]: Without dead ends: 95 [2024-11-27 23:33:48,502 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9303 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=2302, Invalid=39518, Unknown=0, NotChecked=0, Total=41820 [2024-11-27 23:33:48,503 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 491 mSDsluCounter, 2847 mSDsCounter, 0 mSdLazyCounter, 9034 mSolverCounterSat, 536 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 2879 SdHoareTripleChecker+Invalid, 9570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 536 IncrementalHoareTripleChecker+Valid, 9034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2024-11-27 23:33:48,503 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 2879 Invalid, 9570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [536 Valid, 9034 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2024-11-27 23:33:48,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-11-27 23:33:48,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 86. [2024-11-27 23:33:48,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 59 states have internal predecessors, (60), 5 states have call successors, (5), 2 states have call predecessors, (5), 22 states have return successors, (46), 24 states have call predecessors, (46), 5 states have call successors, (46) [2024-11-27 23:33:48,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 111 transitions. [2024-11-27 23:33:48,534 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 111 transitions. Word has length 174 [2024-11-27 23:33:48,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:33:48,534 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 111 transitions. [2024-11-27 23:33:48,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 148 states have (on average 1.3986486486486487) internal successors, (207), 84 states have internal predecessors, (207), 28 states have call successors, (28), 1 states have call predecessors, (28), 46 states have return successors, (69), 68 states have call predecessors, (69), 28 states have call successors, (69) [2024-11-27 23:33:48,535 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 111 transitions. [2024-11-27 23:33:48,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2024-11-27 23:33:48,536 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:33:48,536 INFO L218 NwaCegarLoop]: trace histogram [36, 36, 36, 34, 34, 34, 34, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:33:48,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-27 23:33:48,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:33:48,737 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:33:48,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:33:48,738 INFO L85 PathProgramCache]: Analyzing trace with hash -99087298, now seen corresponding path program 24 times [2024-11-27 23:33:48,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:33:48,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250130082] [2024-11-27 23:33:48,738 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:33:48,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:33:48,849 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2024-11-27 23:33:48,849 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:33:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4272 backedges. 656 proven. 2821 refuted. 0 times theorem prover too weak. 795 trivial. 0 not checked. [2024-11-27 23:33:59,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:33:59,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250130082] [2024-11-27 23:33:59,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250130082] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:33:59,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71426812] [2024-11-27 23:33:59,438 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:33:59,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:33:59,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:33:59,439 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:33:59,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-27 23:33:59,929 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2024-11-27 23:33:59,929 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:33:59,939 WARN L254 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 433 conjuncts are in the unsatisfiable core [2024-11-27 23:33:59,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:34:05,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4272 backedges. 21 proven. 1895 refuted. 0 times theorem prover too weak. 2356 trivial. 0 not checked. [2024-11-27 23:34:05,998 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:34:32,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4272 backedges. 140 proven. 3498 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2024-11-27 23:34:32,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71426812] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:34:32,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:34:32,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 52, 111] total 234 [2024-11-27 23:34:32,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070566115] [2024-11-27 23:34:32,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:34:32,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 234 states [2024-11-27 23:34:32,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:34:32,299 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 234 interpolants. [2024-11-27 23:34:32,303 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=878, Invalid=53644, Unknown=0, NotChecked=0, Total=54522 [2024-11-27 23:34:32,304 INFO L87 Difference]: Start difference. First operand 86 states and 111 transitions. Second operand has 234 states, 229 states have (on average 1.537117903930131) internal successors, (352), 142 states have internal predecessors, (352), 62 states have call successors, (62), 1 states have call predecessors, (62), 68 states have return successors, (95), 92 states have call predecessors, (95), 62 states have call successors, (95) [2024-11-27 23:34:51,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:34:51,145 INFO L93 Difference]: Finished difference Result 125 states and 179 transitions. [2024-11-27 23:34:51,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2024-11-27 23:34:51,145 INFO L78 Accepts]: Start accepts. Automaton has has 234 states, 229 states have (on average 1.537117903930131) internal successors, (352), 142 states have internal predecessors, (352), 62 states have call successors, (62), 1 states have call predecessors, (62), 68 states have return successors, (95), 92 states have call predecessors, (95), 62 states have call successors, (95) Word has length 258 [2024-11-27 23:34:51,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:34:51,147 INFO L225 Difference]: With dead ends: 125 [2024-11-27 23:34:51,147 INFO L226 Difference]: Without dead ends: 98 [2024-11-27 23:34:51,156 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 706 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22717 ImplicationChecksByTransitivity, 32.2s TimeCoverageRelationStatistics Valid=5775, Invalid=90015, Unknown=0, NotChecked=0, Total=95790 [2024-11-27 23:34:51,156 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 764 mSDsluCounter, 3961 mSDsCounter, 0 mSdLazyCounter, 16413 mSolverCounterSat, 732 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 3995 SdHoareTripleChecker+Invalid, 17145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 732 IncrementalHoareTripleChecker+Valid, 16413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2024-11-27 23:34:51,157 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [767 Valid, 3995 Invalid, 17145 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [732 Valid, 16413 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2024-11-27 23:34:51,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-11-27 23:34:51,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2024-11-27 23:34:51,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 61 states have internal predecessors, (62), 5 states have call successors, (5), 2 states have call predecessors, (5), 23 states have return successors, (48), 25 states have call predecessors, (48), 5 states have call successors, (48) [2024-11-27 23:34:51,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 115 transitions. [2024-11-27 23:34:51,187 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 115 transitions. Word has length 258 [2024-11-27 23:34:51,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:34:51,187 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 115 transitions. [2024-11-27 23:34:51,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 234 states, 229 states have (on average 1.537117903930131) internal successors, (352), 142 states have internal predecessors, (352), 62 states have call successors, (62), 1 states have call predecessors, (62), 68 states have return successors, (95), 92 states have call predecessors, (95), 62 states have call successors, (95) [2024-11-27 23:34:51,188 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 115 transitions. [2024-11-27 23:34:51,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2024-11-27 23:34:51,189 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:34:51,190 INFO L218 NwaCegarLoop]: trace histogram [38, 38, 38, 36, 36, 36, 36, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:34:51,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-27 23:34:51,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-27 23:34:51,390 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:34:51,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:34:51,391 INFO L85 PathProgramCache]: Analyzing trace with hash 291536428, now seen corresponding path program 25 times [2024-11-27 23:34:51,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:34:51,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701965162] [2024-11-27 23:34:51,391 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:34:51,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:34:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:35:03,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4775 backedges. 0 proven. 4065 refuted. 0 times theorem prover too weak. 710 trivial. 0 not checked. [2024-11-27 23:35:03,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:35:03,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701965162] [2024-11-27 23:35:03,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701965162] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:35:03,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075077665] [2024-11-27 23:35:03,846 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:35:03,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:35:03,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:35:03,848 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:35:03,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-27 23:35:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:35:04,329 WARN L254 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 457 conjuncts are in the unsatisfiable core [2024-11-27 23:35:04,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:35:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4775 backedges. 22 proven. 2114 refuted. 0 times theorem prover too weak. 2639 trivial. 0 not checked. [2024-11-27 23:35:13,067 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:35:44,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4775 backedges. 149 proven. 3919 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2024-11-27 23:35:44,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075077665] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:35:44,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:35:44,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 54, 117] total 261 [2024-11-27 23:35:44,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792969192] [2024-11-27 23:35:44,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:35:44,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 261 states [2024-11-27 23:35:44,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:35:44,875 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 261 interpolants. [2024-11-27 23:35:44,880 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=960, Invalid=66900, Unknown=0, NotChecked=0, Total=67860 [2024-11-27 23:35:44,881 INFO L87 Difference]: Start difference. First operand 89 states and 115 transitions. Second operand has 261 states, 256 states have (on average 1.58203125) internal successors, (405), 162 states have internal predecessors, (405), 76 states have call successors, (76), 1 states have call predecessors, (76), 74 states have return successors, (100), 99 states have call predecessors, (100), 76 states have call successors, (100) [2024-11-27 23:36:06,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:36:06,183 INFO L93 Difference]: Finished difference Result 129 states and 185 transitions. [2024-11-27 23:36:06,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2024-11-27 23:36:06,184 INFO L78 Accepts]: Start accepts. Automaton has has 261 states, 256 states have (on average 1.58203125) internal successors, (405), 162 states have internal predecessors, (405), 76 states have call successors, (76), 1 states have call predecessors, (76), 74 states have return successors, (100), 99 states have call predecessors, (100), 76 states have call successors, (100) Word has length 272 [2024-11-27 23:36:06,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:36:06,185 INFO L225 Difference]: With dead ends: 129 [2024-11-27 23:36:06,186 INFO L226 Difference]: Without dead ends: 101 [2024-11-27 23:36:06,197 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 743 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 338 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21900 ImplicationChecksByTransitivity, 42.7s TimeCoverageRelationStatistics Valid=6810, Invalid=108450, Unknown=0, NotChecked=0, Total=115260 [2024-11-27 23:36:06,197 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 662 mSDsluCounter, 3921 mSDsCounter, 0 mSdLazyCounter, 17036 mSolverCounterSat, 1989 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 3957 SdHoareTripleChecker+Invalid, 19025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1989 IncrementalHoareTripleChecker+Valid, 17036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2024-11-27 23:36:06,198 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [664 Valid, 3957 Invalid, 19025 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1989 Valid, 17036 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2024-11-27 23:36:06,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-11-27 23:36:06,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 92. [2024-11-27 23:36:06,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 62 states have (on average 1.032258064516129) internal successors, (64), 63 states have internal predecessors, (64), 5 states have call successors, (5), 2 states have call predecessors, (5), 24 states have return successors, (50), 26 states have call predecessors, (50), 5 states have call successors, (50) [2024-11-27 23:36:06,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 119 transitions. [2024-11-27 23:36:06,229 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 119 transitions. Word has length 272 [2024-11-27 23:36:06,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:36:06,229 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 119 transitions. [2024-11-27 23:36:06,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 261 states, 256 states have (on average 1.58203125) internal successors, (405), 162 states have internal predecessors, (405), 76 states have call successors, (76), 1 states have call predecessors, (76), 74 states have return successors, (100), 99 states have call predecessors, (100), 76 states have call successors, (100) [2024-11-27 23:36:06,230 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 119 transitions. [2024-11-27 23:36:06,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2024-11-27 23:36:06,231 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:36:06,231 INFO L218 NwaCegarLoop]: trace histogram [27, 27, 27, 25, 25, 25, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:36:06,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-27 23:36:06,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:36:06,432 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:36:06,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:36:06,432 INFO L85 PathProgramCache]: Analyzing trace with hash -25389512, now seen corresponding path program 26 times [2024-11-27 23:36:06,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:36:06,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431165231] [2024-11-27 23:36:06,433 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:36:06,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:36:06,464 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:36:06,465 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:36:12,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 2 proven. 2002 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2024-11-27 23:36:12,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:36:12,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431165231] [2024-11-27 23:36:12,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431165231] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:36:12,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127111415] [2024-11-27 23:36:12,633 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:36:12,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:36:12,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:36:12,635 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:36:12,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-27 23:36:13,134 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:36:13,134 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:36:13,139 WARN L254 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 325 conjuncts are in the unsatisfiable core [2024-11-27 23:36:13,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:36:19,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 23 proven. 1071 refuted. 0 times theorem prover too weak. 1261 trivial. 0 not checked. [2024-11-27 23:36:19,501 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:36:37,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2355 backedges. 80 proven. 1920 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2024-11-27 23:36:37,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127111415] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:36:37,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:36:37,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 56, 84] total 197 [2024-11-27 23:36:37,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877609867] [2024-11-27 23:36:37,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:36:37,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2024-11-27 23:36:37,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:36:37,607 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2024-11-27 23:36:37,609 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=37937, Unknown=0, NotChecked=0, Total=38612 [2024-11-27 23:36:37,610 INFO L87 Difference]: Start difference. First operand 92 states and 119 transitions. Second operand has 197 states, 192 states have (on average 1.5677083333333333) internal successors, (301), 119 states have internal predecessors, (301), 55 states have call successors, (55), 1 states have call predecessors, (55), 52 states have return successors, (79), 78 states have call predecessors, (79), 55 states have call successors, (79) [2024-11-27 23:36:50,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:36:50,558 INFO L93 Difference]: Finished difference Result 111 states and 147 transitions. [2024-11-27 23:36:50,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-11-27 23:36:50,559 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 192 states have (on average 1.5677083333333333) internal successors, (301), 119 states have internal predecessors, (301), 55 states have call successors, (55), 1 states have call predecessors, (55), 52 states have return successors, (79), 78 states have call predecessors, (79), 55 states have call successors, (79) Word has length 195 [2024-11-27 23:36:50,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:36:50,560 INFO L225 Difference]: With dead ends: 111 [2024-11-27 23:36:50,560 INFO L226 Difference]: Without dead ends: 104 [2024-11-27 23:36:50,564 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13742 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=3636, Invalid=62156, Unknown=0, NotChecked=0, Total=65792 [2024-11-27 23:36:50,565 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 702 mSDsluCounter, 3682 mSDsCounter, 0 mSdLazyCounter, 10921 mSolverCounterSat, 1419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 3717 SdHoareTripleChecker+Invalid, 12340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1419 IncrementalHoareTripleChecker+Valid, 10921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:36:50,565 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [705 Valid, 3717 Invalid, 12340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1419 Valid, 10921 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2024-11-27 23:36:50,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-27 23:36:50,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2024-11-27 23:36:50,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 64 states have (on average 1.03125) internal successors, (66), 65 states have internal predecessors, (66), 5 states have call successors, (5), 2 states have call predecessors, (5), 25 states have return successors, (52), 27 states have call predecessors, (52), 5 states have call successors, (52) [2024-11-27 23:36:50,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 123 transitions. [2024-11-27 23:36:50,598 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 123 transitions. Word has length 195 [2024-11-27 23:36:50,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:36:50,598 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 123 transitions. [2024-11-27 23:36:50,598 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 192 states have (on average 1.5677083333333333) internal successors, (301), 119 states have internal predecessors, (301), 55 states have call successors, (55), 1 states have call predecessors, (55), 52 states have return successors, (79), 78 states have call predecessors, (79), 55 states have call successors, (79) [2024-11-27 23:36:50,598 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 123 transitions. [2024-11-27 23:36:50,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2024-11-27 23:36:50,600 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:36:50,600 INFO L218 NwaCegarLoop]: trace histogram [28, 28, 28, 26, 26, 26, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:36:50,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-27 23:36:50,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:36:50,801 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:36:50,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:36:50,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1310233820, now seen corresponding path program 27 times [2024-11-27 23:36:50,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:36:50,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229895787] [2024-11-27 23:36:50,801 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:36:50,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:36:50,891 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2024-11-27 23:36:50,891 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:36:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2540 backedges. 27 proven. 1155 refuted. 0 times theorem prover too weak. 1358 trivial. 0 not checked. [2024-11-27 23:36:55,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:36:55,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229895787] [2024-11-27 23:36:55,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229895787] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:36:55,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896021694] [2024-11-27 23:36:55,595 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:36:55,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:36:55,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:36:55,596 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:36:55,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-27 23:36:56,167 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2024-11-27 23:36:56,168 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:36:56,176 WARN L254 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 337 conjuncts are in the unsatisfiable core [2024-11-27 23:36:56,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:36:58,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2540 backedges. 24 proven. 1153 refuted. 0 times theorem prover too weak. 1363 trivial. 0 not checked. [2024-11-27 23:36:58,776 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:37:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2540 backedges. 83 proven. 2075 refuted. 0 times theorem prover too weak. 382 trivial. 0 not checked. [2024-11-27 23:37:13,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896021694] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:37:13,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:37:13,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 58, 87] total 125 [2024-11-27 23:37:13,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875518527] [2024-11-27 23:37:13,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:37:13,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2024-11-27 23:37:13,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:37:13,435 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2024-11-27 23:37:13,436 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=15069, Unknown=0, NotChecked=0, Total=15500 [2024-11-27 23:37:13,436 INFO L87 Difference]: Start difference. First operand 95 states and 123 transitions. Second operand has 125 states, 122 states have (on average 1.5081967213114753) internal successors, (184), 68 states have internal predecessors, (184), 31 states have call successors, (31), 1 states have call predecessors, (31), 29 states have return successors, (80), 57 states have call predecessors, (80), 31 states have call successors, (80) [2024-11-27 23:37:23,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:37:23,276 INFO L93 Difference]: Finished difference Result 120 states and 154 transitions. [2024-11-27 23:37:23,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-11-27 23:37:23,276 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 122 states have (on average 1.5081967213114753) internal successors, (184), 68 states have internal predecessors, (184), 31 states have call successors, (31), 1 states have call predecessors, (31), 29 states have return successors, (80), 57 states have call predecessors, (80), 31 states have call successors, (80) Word has length 202 [2024-11-27 23:37:23,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:37:23,278 INFO L225 Difference]: With dead ends: 120 [2024-11-27 23:37:23,278 INFO L226 Difference]: Without dead ends: 109 [2024-11-27 23:37:23,283 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6397 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=2547, Invalid=32609, Unknown=0, NotChecked=0, Total=35156 [2024-11-27 23:37:23,285 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 686 mSDsluCounter, 2146 mSDsCounter, 0 mSdLazyCounter, 6510 mSolverCounterSat, 1141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 2184 SdHoareTripleChecker+Invalid, 7651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1141 IncrementalHoareTripleChecker+Valid, 6510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-11-27 23:37:23,289 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 2184 Invalid, 7651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1141 Valid, 6510 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-11-27 23:37:23,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-27 23:37:23,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2024-11-27 23:37:23,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 73 states have internal predecessors, (74), 7 states have call successors, (7), 3 states have call predecessors, (7), 27 states have return successors, (57), 30 states have call predecessors, (57), 7 states have call successors, (57) [2024-11-27 23:37:23,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 138 transitions. [2024-11-27 23:37:23,331 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 138 transitions. Word has length 202 [2024-11-27 23:37:23,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:37:23,331 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 138 transitions. [2024-11-27 23:37:23,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 122 states have (on average 1.5081967213114753) internal successors, (184), 68 states have internal predecessors, (184), 31 states have call successors, (31), 1 states have call predecessors, (31), 29 states have return successors, (80), 57 states have call predecessors, (80), 31 states have call successors, (80) [2024-11-27 23:37:23,332 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 138 transitions. [2024-11-27 23:37:23,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2024-11-27 23:37:23,334 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:37:23,334 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 30, 28, 28, 28, 28, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:37:23,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-27 23:37:23,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:37:23,535 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:37:23,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:37:23,535 INFO L85 PathProgramCache]: Analyzing trace with hash 850837998, now seen corresponding path program 28 times [2024-11-27 23:37:23,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:37:23,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307198038] [2024-11-27 23:37:23,536 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:37:23,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:37:23,559 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:37:23,559 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:37:29,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2931 backedges. 179 proven. 1412 refuted. 0 times theorem prover too weak. 1340 trivial. 0 not checked. [2024-11-27 23:37:29,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:37:29,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307198038] [2024-11-27 23:37:29,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307198038] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:37:29,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656256531] [2024-11-27 23:37:29,721 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 23:37:29,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:37:29,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:37:29,722 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:37:29,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-27 23:37:30,308 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 23:37:30,308 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:37:30,314 WARN L254 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 361 conjuncts are in the unsatisfiable core [2024-11-27 23:37:30,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:37:35,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2931 backedges. 25 proven. 1324 refuted. 0 times theorem prover too weak. 1582 trivial. 0 not checked. [2024-11-27 23:37:35,424 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:37:55,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2931 backedges. 92 proven. 2400 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2024-11-27 23:37:55,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656256531] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:37:55,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:37:55,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 60, 93] total 185 [2024-11-27 23:37:55,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330114238] [2024-11-27 23:37:55,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:37:55,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 185 states [2024-11-27 23:37:55,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:37:55,672 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 185 interpolants. [2024-11-27 23:37:55,674 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=33332, Unknown=0, NotChecked=0, Total=34040 [2024-11-27 23:37:55,674 INFO L87 Difference]: Start difference. First operand 107 states and 138 transitions. Second operand has 185 states, 181 states have (on average 1.3701657458563536) internal successors, (248), 101 states have internal predecessors, (248), 34 states have call successors, (34), 1 states have call predecessors, (34), 57 states have return successors, (86), 84 states have call predecessors, (86), 34 states have call successors, (86) [2024-11-27 23:38:09,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:38:09,202 INFO L93 Difference]: Finished difference Result 129 states and 170 transitions. [2024-11-27 23:38:09,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-27 23:38:09,202 INFO L78 Accepts]: Start accepts. Automaton has has 185 states, 181 states have (on average 1.3701657458563536) internal successors, (248), 101 states have internal predecessors, (248), 34 states have call successors, (34), 1 states have call predecessors, (34), 57 states have return successors, (86), 84 states have call predecessors, (86), 34 states have call successors, (86) Word has length 216 [2024-11-27 23:38:09,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:38:09,204 INFO L225 Difference]: With dead ends: 129 [2024-11-27 23:38:09,204 INFO L226 Difference]: Without dead ends: 119 [2024-11-27 23:38:09,210 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 343 SyntacticMatches, 2 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13877 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=3128, Invalid=58128, Unknown=0, NotChecked=0, Total=61256 [2024-11-27 23:38:09,211 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 707 mSDsluCounter, 2646 mSDsCounter, 0 mSdLazyCounter, 9155 mSolverCounterSat, 918 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 2685 SdHoareTripleChecker+Invalid, 10073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 918 IncrementalHoareTripleChecker+Valid, 9155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:38:09,211 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 2685 Invalid, 10073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [918 Valid, 9155 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2024-11-27 23:38:09,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-27 23:38:09,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 110. [2024-11-27 23:38:09,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 74 states have (on average 1.027027027027027) internal successors, (76), 75 states have internal predecessors, (76), 7 states have call successors, (7), 3 states have call predecessors, (7), 28 states have return successors, (59), 31 states have call predecessors, (59), 7 states have call successors, (59) [2024-11-27 23:38:09,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 142 transitions. [2024-11-27 23:38:09,261 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 142 transitions. Word has length 216 [2024-11-27 23:38:09,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:38:09,261 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 142 transitions. [2024-11-27 23:38:09,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 185 states, 181 states have (on average 1.3701657458563536) internal successors, (248), 101 states have internal predecessors, (248), 34 states have call successors, (34), 1 states have call predecessors, (34), 57 states have return successors, (86), 84 states have call predecessors, (86), 34 states have call successors, (86) [2024-11-27 23:38:09,262 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 142 transitions. [2024-11-27 23:38:09,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2024-11-27 23:38:09,263 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:38:09,264 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 30, 28, 28, 28, 28, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:38:09,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-11-27 23:38:09,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-27 23:38:09,464 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:38:09,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:38:09,465 INFO L85 PathProgramCache]: Analyzing trace with hash 934337836, now seen corresponding path program 29 times [2024-11-27 23:38:09,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:38:09,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481976437] [2024-11-27 23:38:09,465 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:38:09,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:38:09,546 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2024-11-27 23:38:09,546 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:38:15,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2931 backedges. 77 proven. 1366 refuted. 0 times theorem prover too weak. 1488 trivial. 0 not checked. [2024-11-27 23:38:15,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:38:15,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481976437] [2024-11-27 23:38:15,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481976437] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:38:15,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687772922] [2024-11-27 23:38:15,646 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 23:38:15,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:38:15,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:38:15,648 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:38:15,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-27 23:38:16,327 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2024-11-27 23:38:16,328 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:38:16,335 WARN L254 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 361 conjuncts are in the unsatisfiable core [2024-11-27 23:38:16,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:38:22,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2931 backedges. 53 proven. 1300 refuted. 0 times theorem prover too weak. 1578 trivial. 0 not checked. [2024-11-27 23:38:22,077 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:38:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2931 backedges. 90 proven. 2403 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2024-11-27 23:38:43,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687772922] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:38:43,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:38:43,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 62, 93] total 188 [2024-11-27 23:38:43,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473684071] [2024-11-27 23:38:43,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:38:43,212 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 188 states [2024-11-27 23:38:43,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:38:43,213 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2024-11-27 23:38:43,215 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=719, Invalid=34437, Unknown=0, NotChecked=0, Total=35156 [2024-11-27 23:38:43,215 INFO L87 Difference]: Start difference. First operand 110 states and 142 transitions. Second operand has 188 states, 184 states have (on average 1.3858695652173914) internal successors, (255), 102 states have internal predecessors, (255), 34 states have call successors, (34), 1 states have call predecessors, (34), 58 states have return successors, (87), 86 states have call predecessors, (87), 34 states have call successors, (87) [2024-11-27 23:38:57,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:38:57,442 INFO L93 Difference]: Finished difference Result 124 states and 160 transitions. [2024-11-27 23:38:57,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-11-27 23:38:57,443 INFO L78 Accepts]: Start accepts. Automaton has has 188 states, 184 states have (on average 1.3858695652173914) internal successors, (255), 102 states have internal predecessors, (255), 34 states have call successors, (34), 1 states have call predecessors, (34), 58 states have return successors, (87), 86 states have call predecessors, (87), 34 states have call successors, (87) Word has length 216 [2024-11-27 23:38:57,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:38:57,444 INFO L225 Difference]: With dead ends: 124 [2024-11-27 23:38:57,444 INFO L226 Difference]: Without dead ends: 115 [2024-11-27 23:38:57,450 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14393 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=3222, Invalid=60534, Unknown=0, NotChecked=0, Total=63756 [2024-11-27 23:38:57,451 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 844 mSDsluCounter, 3289 mSDsCounter, 0 mSdLazyCounter, 10807 mSolverCounterSat, 1391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 3327 SdHoareTripleChecker+Invalid, 12198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1391 IncrementalHoareTripleChecker+Valid, 10807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:38:57,451 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [874 Valid, 3327 Invalid, 12198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1391 Valid, 10807 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2024-11-27 23:38:57,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-27 23:38:57,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2024-11-27 23:38:57,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 77 states have internal predecessors, (78), 7 states have call successors, (7), 3 states have call predecessors, (7), 29 states have return successors, (61), 32 states have call predecessors, (61), 7 states have call successors, (61) [2024-11-27 23:38:57,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 146 transitions. [2024-11-27 23:38:57,501 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 146 transitions. Word has length 216 [2024-11-27 23:38:57,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:38:57,501 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 146 transitions. [2024-11-27 23:38:57,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 188 states, 184 states have (on average 1.3858695652173914) internal successors, (255), 102 states have internal predecessors, (255), 34 states have call successors, (34), 1 states have call predecessors, (34), 58 states have return successors, (87), 86 states have call predecessors, (87), 34 states have call successors, (87) [2024-11-27 23:38:57,502 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 146 transitions. [2024-11-27 23:38:57,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2024-11-27 23:38:57,503 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:38:57,503 INFO L218 NwaCegarLoop]: trace histogram [31, 31, 31, 29, 29, 29, 29, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:38:57,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-27 23:38:57,704 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-27 23:38:57,704 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:38:57,704 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:38:57,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1836402072, now seen corresponding path program 30 times [2024-11-27 23:38:57,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:38:57,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924514303] [2024-11-27 23:38:57,705 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:38:57,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:38:57,764 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2024-11-27 23:38:57,764 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:39:03,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3137 backedges. 233 proven. 1746 refuted. 0 times theorem prover too weak. 1158 trivial. 0 not checked. [2024-11-27 23:39:03,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:39:03,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924514303] [2024-11-27 23:39:03,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924514303] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:39:03,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227460417] [2024-11-27 23:39:03,907 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 23:39:03,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:03,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:39:03,909 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:39:03,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-27 23:39:04,645 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2024-11-27 23:39:04,645 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:39:04,651 WARN L254 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 373 conjuncts are in the unsatisfiable core [2024-11-27 23:39:04,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:39:10,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3137 backedges. 27 proven. 1417 refuted. 0 times theorem prover too weak. 1693 trivial. 0 not checked. [2024-11-27 23:39:10,704 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:39:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3137 backedges. 92 proven. 2576 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2024-11-27 23:39:33,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227460417] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:39:33,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:39:33,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 64, 96] total 199 [2024-11-27 23:39:33,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032697515] [2024-11-27 23:39:33,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:39:33,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 199 states [2024-11-27 23:39:33,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:39:33,308 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 199 interpolants. [2024-11-27 23:39:33,311 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=689, Invalid=38713, Unknown=0, NotChecked=0, Total=39402 [2024-11-27 23:39:33,311 INFO L87 Difference]: Start difference. First operand 113 states and 146 transitions. Second operand has 199 states, 194 states have (on average 1.4175257731958764) internal successors, (275), 111 states have internal predecessors, (275), 41 states have call successors, (41), 1 states have call predecessors, (41), 58 states have return successors, (91), 88 states have call predecessors, (91), 41 states have call successors, (91) [2024-11-27 23:39:48,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:39:48,458 INFO L93 Difference]: Finished difference Result 127 states and 164 transitions. [2024-11-27 23:39:48,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-11-27 23:39:48,459 INFO L78 Accepts]: Start accepts. Automaton has has 199 states, 194 states have (on average 1.4175257731958764) internal successors, (275), 111 states have internal predecessors, (275), 41 states have call successors, (41), 1 states have call predecessors, (41), 58 states have return successors, (91), 88 states have call predecessors, (91), 41 states have call successors, (91) Word has length 223 [2024-11-27 23:39:48,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:39:48,460 INFO L225 Difference]: With dead ends: 127 [2024-11-27 23:39:48,460 INFO L226 Difference]: Without dead ends: 118 [2024-11-27 23:39:48,465 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17270 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=3680, Invalid=67342, Unknown=0, NotChecked=0, Total=71022 [2024-11-27 23:39:48,465 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 821 mSDsluCounter, 3436 mSDsCounter, 0 mSdLazyCounter, 10852 mSolverCounterSat, 994 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 823 SdHoareTripleChecker+Valid, 3476 SdHoareTripleChecker+Invalid, 11846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 994 IncrementalHoareTripleChecker+Valid, 10852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2024-11-27 23:39:48,465 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [823 Valid, 3476 Invalid, 11846 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [994 Valid, 10852 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2024-11-27 23:39:48,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-27 23:39:48,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2024-11-27 23:39:48,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 79 states have internal predecessors, (80), 7 states have call successors, (7), 3 states have call predecessors, (7), 30 states have return successors, (63), 33 states have call predecessors, (63), 7 states have call successors, (63) [2024-11-27 23:39:48,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 150 transitions. [2024-11-27 23:39:48,514 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 150 transitions. Word has length 223 [2024-11-27 23:39:48,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:39:48,514 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 150 transitions. [2024-11-27 23:39:48,515 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 199 states, 194 states have (on average 1.4175257731958764) internal successors, (275), 111 states have internal predecessors, (275), 41 states have call successors, (41), 1 states have call predecessors, (41), 58 states have return successors, (91), 88 states have call predecessors, (91), 41 states have call successors, (91) [2024-11-27 23:39:48,515 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 150 transitions. [2024-11-27 23:39:48,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2024-11-27 23:39:48,516 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:39:48,516 INFO L218 NwaCegarLoop]: trace histogram [33, 33, 33, 31, 31, 31, 31, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:39:48,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-11-27 23:39:48,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-27 23:39:48,717 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-27 23:39:48,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:39:48,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1743997642, now seen corresponding path program 31 times [2024-11-27 23:39:48,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:39:48,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993859406] [2024-11-27 23:39:48,717 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:39:48,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:39:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:39:58,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3038 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2024-11-27 23:39:58,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:39:58,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993859406] [2024-11-27 23:39:58,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993859406] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:39:58,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965338781] [2024-11-27 23:39:58,045 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 23:39:58,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:39:58,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:39:58,046 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:39:58,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_196067b6-a0fe-4fd3-af93-1c5d5f67443a/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-27 23:39:58,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:39:58,837 WARN L254 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 397 conjuncts are in the unsatisfiable core [2024-11-27 23:39:58,843 INFO L279 TraceCheckSpWp]: Computing forward predicates...