./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sum05-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sum05-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd --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 11bff2dc480380b1206bedd51506b0437b9af4529e78b5beefb811437146f17f --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 16:10:02,288 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 16:10:02,415 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-13 16:10:02,424 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 16:10:02,428 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 16:10:02,474 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 16:10:02,476 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 16:10:02,477 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 16:10:02,477 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 16:10:02,477 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 16:10:02,478 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 16:10:02,478 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 16:10:02,479 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 16:10:02,479 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 16:10:02,479 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 16:10:02,479 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 16:10:02,481 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-13 16:10:02,481 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 16:10:02,482 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 16:10:02,482 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 16:10:02,482 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 16:10:02,482 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-13 16:10:02,482 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 16:10:02,482 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-13 16:10:02,482 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 16:10:02,483 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 16:10:02,483 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-13 16:10:02,483 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 16:10:02,483 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 16:10:02,483 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 16:10:02,483 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 16:10:02,483 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 16:10:02,483 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 16:10:02,484 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 16:10:02,484 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 16:10:02,484 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-13 16:10:02,484 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 16:10:02,484 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 16:10:02,484 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 16:10:02,484 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 16:10:02,484 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 16:10:02,484 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 16:10:02,484 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_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd 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 -> 11bff2dc480380b1206bedd51506b0437b9af4529e78b5beefb811437146f17f [2024-11-13 16:10:02,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 16:10:02,906 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 16:10:02,909 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 16:10:02,911 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 16:10:02,912 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 16:10:02,913 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/reducercommutativity/sum05-2.i Unable to find full path for "g++" [2024-11-13 16:10:05,183 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 16:10:05,507 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 16:10:05,508 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/sv-benchmarks/c/reducercommutativity/sum05-2.i [2024-11-13 16:10:05,517 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/data/42b643f4c/fe93b96a7def4554a17511b7ce5eb501/FLAG3324d937d [2024-11-13 16:10:05,777 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/data/42b643f4c/fe93b96a7def4554a17511b7ce5eb501 [2024-11-13 16:10:05,780 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 16:10:05,781 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 16:10:05,783 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 16:10:05,783 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 16:10:05,788 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 16:10:05,789 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 04:10:05" (1/1) ... [2024-11-13 16:10:05,790 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c5c8a34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:10:05, skipping insertion in model container [2024-11-13 16:10:05,791 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 04:10:05" (1/1) ... [2024-11-13 16:10:05,810 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 16:10:06,023 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_29107623-888a-4a3d-bc5a-ad3bfbad921d/sv-benchmarks/c/reducercommutativity/sum05-2.i[1271,1284] [2024-11-13 16:10:06,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 16:10:06,038 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 16:10:06,060 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_29107623-888a-4a3d-bc5a-ad3bfbad921d/sv-benchmarks/c/reducercommutativity/sum05-2.i[1271,1284] [2024-11-13 16:10:06,061 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 16:10:06,078 INFO L204 MainTranslator]: Completed translation [2024-11-13 16:10:06,078 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:10:06 WrapperNode [2024-11-13 16:10:06,079 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 16:10:06,080 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 16:10:06,080 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 16:10:06,080 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 16:10:06,089 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:10:06" (1/1) ... [2024-11-13 16:10:06,098 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:10:06" (1/1) ... [2024-11-13 16:10:06,121 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2024-11-13 16:10:06,121 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 16:10:06,122 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 16:10:06,122 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 16:10:06,122 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 16:10:06,132 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:10:06" (1/1) ... [2024-11-13 16:10:06,133 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:10:06" (1/1) ... [2024-11-13 16:10:06,135 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:10:06" (1/1) ... [2024-11-13 16:10:06,157 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 5 writes are split as follows [0, 5]. [2024-11-13 16:10:06,157 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:10:06" (1/1) ... [2024-11-13 16:10:06,158 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:10:06" (1/1) ... [2024-11-13 16:10:06,164 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:10:06" (1/1) ... [2024-11-13 16:10:06,168 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:10:06" (1/1) ... [2024-11-13 16:10:06,169 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:10:06" (1/1) ... [2024-11-13 16:10:06,170 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:10:06" (1/1) ... [2024-11-13 16:10:06,172 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 16:10:06,174 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 16:10:06,174 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 16:10:06,174 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 16:10:06,175 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:10:06" (1/1) ... [2024-11-13 16:10:06,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 16:10:06,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:10:06,216 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 16:10:06,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 16:10:06,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 16:10:06,260 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2024-11-13 16:10:06,260 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2024-11-13 16:10:06,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 16:10:06,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 16:10:06,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-13 16:10:06,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 16:10:06,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 16:10:06,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 16:10:06,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 16:10:06,262 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 16:10:06,262 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 16:10:06,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-13 16:10:06,385 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 16:10:06,388 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 16:10:06,643 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-11-13 16:10:06,643 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 16:10:06,657 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 16:10:06,657 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-13 16:10:06,658 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 04:10:06 BoogieIcfgContainer [2024-11-13 16:10:06,658 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 16:10:06,665 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 16:10:06,665 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 16:10:06,674 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 16:10:06,675 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 04:10:05" (1/3) ... [2024-11-13 16:10:06,675 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b7805c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 04:10:06, skipping insertion in model container [2024-11-13 16:10:06,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 04:10:06" (2/3) ... [2024-11-13 16:10:06,676 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27b7805c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 04:10:06, skipping insertion in model container [2024-11-13 16:10:06,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 04:10:06" (3/3) ... [2024-11-13 16:10:06,678 INFO L112 eAbstractionObserver]: Analyzing ICFG sum05-2.i [2024-11-13 16:10:06,702 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 16:10:06,705 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG sum05-2.i that has 2 procedures, 24 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-13 16:10:06,794 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 16:10:06,809 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;@4fefabf7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 16:10:06,809 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-13 16:10:06,814 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 16:10:06,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-13 16:10:06,823 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:10:06,824 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:10:06,824 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:10:06,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:10:06,831 INFO L85 PathProgramCache]: Analyzing trace with hash -101677610, now seen corresponding path program 1 times [2024-11-13 16:10:06,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:10:06,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566092101] [2024-11-13 16:10:06,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:10:06,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:10:06,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:07,145 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2024-11-13 16:10:07,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:07,198 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-11-13 16:10:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:07,226 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-11-13 16:10:07,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:07,248 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-13 16:10:07,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:10:07,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566092101] [2024-11-13 16:10:07,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566092101] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:10:07,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880486742] [2024-11-13 16:10:07,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:10:07,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:10:07,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:10:07,253 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:10:07,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 16:10:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:07,441 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-13 16:10:07,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:10:07,486 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 16:10:07,486 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 16:10:07,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880486742] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:10:07,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 16:10:07,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-13 16:10:07,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64514966] [2024-11-13 16:10:07,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:10:07,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 16:10:07,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:10:07,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 16:10:07,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 16:10:07,530 INFO L87 Difference]: Start difference. First operand has 24 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 16:10:07,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:10:07,564 INFO L93 Difference]: Finished difference Result 46 states and 65 transitions. [2024-11-13 16:10:07,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 16:10:07,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2024-11-13 16:10:07,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:10:07,573 INFO L225 Difference]: With dead ends: 46 [2024-11-13 16:10:07,573 INFO L226 Difference]: Without dead ends: 21 [2024-11-13 16:10:07,576 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 16:10:07,580 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 16:10:07,581 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 16:10:07,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-13 16:10:07,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-13 16:10:07,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 16:10:07,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2024-11-13 16:10:07,621 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 29 [2024-11-13 16:10:07,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:10:07,621 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2024-11-13 16:10:07,621 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-13 16:10:07,621 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2024-11-13 16:10:07,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-13 16:10:07,623 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:10:07,623 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:10:07,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 16:10:07,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-11-13 16:10:07,824 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:10:07,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:10:07,825 INFO L85 PathProgramCache]: Analyzing trace with hash -413882766, now seen corresponding path program 1 times [2024-11-13 16:10:07,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:10:07,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556747981] [2024-11-13 16:10:07,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:10:07,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:10:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:07,986 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-13 16:10:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:08,000 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-11-13 16:10:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:08,016 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-13 16:10:08,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-13 16:10:08,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:10:08,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556747981] [2024-11-13 16:10:08,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556747981] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:10:08,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226538478] [2024-11-13 16:10:08,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:10:08,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:10:08,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:10:08,034 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:10:08,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 16:10:08,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:08,177 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-13 16:10:08,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:10:08,203 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 16:10:08,203 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 16:10:08,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226538478] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:10:08,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 16:10:08,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2024-11-13 16:10:08,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263038215] [2024-11-13 16:10:08,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:10:08,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 16:10:08,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:10:08,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 16:10:08,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 16:10:08,207 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 16:10:08,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:10:08,232 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2024-11-13 16:10:08,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 16:10:08,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2024-11-13 16:10:08,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:10:08,234 INFO L225 Difference]: With dead ends: 37 [2024-11-13 16:10:08,234 INFO L226 Difference]: Without dead ends: 22 [2024-11-13 16:10:08,234 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-13 16:10:08,236 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 16:10:08,238 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 16:10:08,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-13 16:10:08,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-13 16:10:08,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 16:10:08,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2024-11-13 16:10:08,248 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 30 [2024-11-13 16:10:08,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:10:08,250 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2024-11-13 16:10:08,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 16:10:08,251 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2024-11-13 16:10:08,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-13 16:10:08,254 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:10:08,254 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:10:08,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-13 16:10:08,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:10:08,455 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:10:08,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:10:08,455 INFO L85 PathProgramCache]: Analyzing trace with hash -500376823, now seen corresponding path program 1 times [2024-11-13 16:10:08,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:10:08,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786446907] [2024-11-13 16:10:08,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:10:08,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:10:08,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:08,692 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-13 16:10:08,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:08,733 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 16:10:08,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:08,745 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-11-13 16:10:08,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:08,770 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-13 16:10:08,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:10:08,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786446907] [2024-11-13 16:10:08,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786446907] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:10:08,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466529837] [2024-11-13 16:10:08,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:10:08,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:10:08,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:10:08,776 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:10:08,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 16:10:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:08,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-13 16:10:08,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:10:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-13 16:10:08,950 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 16:10:08,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466529837] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 16:10:08,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 16:10:08,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2024-11-13 16:10:08,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682571217] [2024-11-13 16:10:08,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 16:10:08,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 16:10:08,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:10:08,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 16:10:08,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 16:10:08,960 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 16:10:08,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:10:08,986 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2024-11-13 16:10:08,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 16:10:08,987 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (3), 2 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 33 [2024-11-13 16:10:08,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:10:08,988 INFO L225 Difference]: With dead ends: 35 [2024-11-13 16:10:08,988 INFO L226 Difference]: Without dead ends: 23 [2024-11-13 16:10:08,988 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-13 16:10:08,991 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 16:10:08,993 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 16:10:08,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-13 16:10:09,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-13 16:10:09,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 16:10:09,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2024-11-13 16:10:09,002 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 33 [2024-11-13 16:10:09,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:10:09,005 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2024-11-13 16:10:09,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-13 16:10:09,005 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2024-11-13 16:10:09,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-13 16:10:09,006 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:10:09,007 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:10:09,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 16:10:09,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:10:09,207 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:10:09,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:10:09,208 INFO L85 PathProgramCache]: Analyzing trace with hash -63425191, now seen corresponding path program 1 times [2024-11-13 16:10:09,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:10:09,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618577428] [2024-11-13 16:10:09,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:10:09,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:10:09,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:09,319 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-11-13 16:10:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:09,371 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-11-13 16:10:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:09,383 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-11-13 16:10:09,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:09,416 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-13 16:10:09,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:10:09,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618577428] [2024-11-13 16:10:09,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618577428] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:10:09,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35004684] [2024-11-13 16:10:09,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:10:09,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:10:09,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:10:09,424 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:10:09,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 16:10:09,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:09,529 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-13 16:10:09,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:10:09,580 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-13 16:10:09,583 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:10:09,663 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-11-13 16:10:09,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35004684] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:10:09,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:10:09,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2024-11-13 16:10:09,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323777491] [2024-11-13 16:10:09,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:10:09,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 16:10:09,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:10:09,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 16:10:09,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-13 16:10:09,671 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-13 16:10:09,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:10:09,714 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2024-11-13 16:10:09,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-13 16:10:09,715 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 34 [2024-11-13 16:10:09,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:10:09,716 INFO L225 Difference]: With dead ends: 46 [2024-11-13 16:10:09,716 INFO L226 Difference]: Without dead ends: 27 [2024-11-13 16:10:09,716 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-13 16:10:09,717 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 16:10:09,719 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 16:10:09,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-11-13 16:10:09,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-11-13 16:10:09,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 16:10:09,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-11-13 16:10:09,727 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 34 [2024-11-13 16:10:09,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:10:09,727 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-11-13 16:10:09,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-11-13 16:10:09,728 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-11-13 16:10:09,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-13 16:10:09,729 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:10:09,729 INFO L215 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:10:09,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-13 16:10:09,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:10:09,929 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:10:09,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:10:09,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1946599954, now seen corresponding path program 2 times [2024-11-13 16:10:09,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:10:09,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146070204] [2024-11-13 16:10:09,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:10:09,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:10:09,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:10,120 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-11-13 16:10:10,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:10,130 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-11-13 16:10:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:10,163 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-11-13 16:10:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:10,181 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-11-13 16:10:10,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:10:10,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146070204] [2024-11-13 16:10:10,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146070204] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:10:10,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960154627] [2024-11-13 16:10:10,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 16:10:10,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:10:10,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:10:10,184 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:10:10,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 16:10:10,327 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 16:10:10,327 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:10:10,329 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-13 16:10:10,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:10:10,415 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-13 16:10:10,415 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:10:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-11-13 16:10:10,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960154627] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:10:10,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:10:10,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 9 [2024-11-13 16:10:10,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996185459] [2024-11-13 16:10:10,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:10:10,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-13 16:10:10,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:10:10,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-13 16:10:10,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-13 16:10:10,515 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-13 16:10:10,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:10:10,558 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2024-11-13 16:10:10,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 16:10:10,561 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 40 [2024-11-13 16:10:10,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:10:10,562 INFO L225 Difference]: With dead ends: 49 [2024-11-13 16:10:10,562 INFO L226 Difference]: Without dead ends: 29 [2024-11-13 16:10:10,563 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-13 16:10:10,564 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 16:10:10,564 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 16:10:10,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-11-13 16:10:10,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-11-13 16:10:10,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 16:10:10,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2024-11-13 16:10:10,575 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2024-11-13 16:10:10,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:10:10,576 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2024-11-13 16:10:10,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-11-13 16:10:10,576 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2024-11-13 16:10:10,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-13 16:10:10,581 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:10:10,581 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:10:10,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 16:10:10,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:10:10,782 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:10:10,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:10:10,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1372310418, now seen corresponding path program 3 times [2024-11-13 16:10:10,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:10:10,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960619590] [2024-11-13 16:10:10,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:10:10,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:10:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:10,892 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 16:10:10,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:10,931 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-11-13 16:10:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:10,940 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-11-13 16:10:10,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:10,950 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-13 16:10:10,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:10:10,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960619590] [2024-11-13 16:10:10,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960619590] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:10:10,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320917611] [2024-11-13 16:10:10,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-13 16:10:10,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:10:10,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:10:10,954 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:10:10,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 16:10:11,076 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-13 16:10:11,077 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:10:11,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 16:10:11,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:10:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-13 16:10:11,109 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:10:11,170 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 24 proven. 3 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-13 16:10:11,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320917611] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:10:11,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:10:11,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-11-13 16:10:11,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026253527] [2024-11-13 16:10:11,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:10:11,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 16:10:11,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:10:11,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 16:10:11,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-13 16:10:11,173 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 16:10:11,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:10:11,200 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2024-11-13 16:10:11,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 16:10:11,201 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2024-11-13 16:10:11,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:10:11,202 INFO L225 Difference]: With dead ends: 51 [2024-11-13 16:10:11,202 INFO L226 Difference]: Without dead ends: 32 [2024-11-13 16:10:11,203 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-13 16:10:11,204 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-13 16:10:11,204 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 128 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-13 16:10:11,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-11-13 16:10:11,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-11-13 16:10:11,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 16:10:11,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-11-13 16:10:11,211 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 42 [2024-11-13 16:10:11,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:10:11,211 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-11-13 16:10:11,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-11-13 16:10:11,212 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-11-13 16:10:11,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-13 16:10:11,213 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:10:11,213 INFO L215 NwaCegarLoop]: trace histogram [15, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:10:11,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-13 16:10:11,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-13 16:10:11,414 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:10:11,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:10:11,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1331652919, now seen corresponding path program 4 times [2024-11-13 16:10:11,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:10:11,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060562502] [2024-11-13 16:10:11,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:10:11,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:10:11,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:11,572 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 16:10:11,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:11,586 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-13 16:10:11,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:11,598 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-11-13 16:10:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-13 16:10:11,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 16:10:11,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060562502] [2024-11-13 16:10:11,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060562502] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 16:10:11,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759017117] [2024-11-13 16:10:11,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-13 16:10:11,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 16:10:11,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 16:10:11,619 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 16:10:11,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 16:10:11,783 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-13 16:10:11,784 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 16:10:11,787 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-13 16:10:11,789 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 16:10:11,822 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 80 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-13 16:10:11,823 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 16:10:11,883 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-11-13 16:10:11,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759017117] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 16:10:11,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 16:10:11,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-11-13 16:10:11,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916619491] [2024-11-13 16:10:11,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 16:10:11,884 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-13 16:10:11,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 16:10:11,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-13 16:10:11,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-13 16:10:11,886 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 16:10:11,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-13 16:10:11,954 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2024-11-13 16:10:11,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 16:10:11,955 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2024-11-13 16:10:11,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-13 16:10:11,956 INFO L225 Difference]: With dead ends: 50 [2024-11-13 16:10:11,956 INFO L226 Difference]: Without dead ends: 34 [2024-11-13 16:10:11,956 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-13 16:10:11,957 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-13 16:10:11,957 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-13 16:10:11,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-13 16:10:11,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-13 16:10:11,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-13 16:10:11,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2024-11-13 16:10:11,970 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 51 [2024-11-13 16:10:11,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-13 16:10:11,970 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2024-11-13 16:10:11,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-13 16:10:11,970 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2024-11-13 16:10:11,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-13 16:10:11,971 INFO L207 NwaCegarLoop]: Found error trace [2024-11-13 16:10:11,971 INFO L215 NwaCegarLoop]: trace histogram [15, 5, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 16:10:11,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 16:10:12,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_29107623-888a-4a3d-bc5a-ad3bfbad921d/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-13 16:10:12,172 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-13 16:10:12,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 16:10:12,173 INFO L85 PathProgramCache]: Analyzing trace with hash 454172873, now seen corresponding path program 5 times [2024-11-13 16:10:12,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 16:10:12,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477730356] [2024-11-13 16:10:12,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 16:10:12,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 16:10:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:22,062 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-11-13 16:10:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 16:10:23,290 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-11-13 16:10:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat