./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 2e8196ca3e7f8da6be63ed057317b8a370ba560e11740ea9a51451f140c434c1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:00:57,201 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:00:57,310 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:00:57,323 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:00:57,323 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:00:57,361 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:00:57,362 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:00:57,362 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:00:57,363 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:00:57,364 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:00:57,365 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:00:57,365 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:00:57,366 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:00:57,367 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:00:57,367 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:00:57,368 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:00:57,368 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:00:57,369 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:00:57,370 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:00:57,370 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:00:57,371 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:00:57,372 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:00:57,372 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:00:57,373 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:00:57,373 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:00:57,374 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:00:57,374 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:00:57,375 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:00:57,376 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:00:57,376 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:00:57,377 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:00:57,378 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:00:57,378 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:00:57,379 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:00:57,379 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:00:57,380 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:00:57,380 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:00:57,381 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:00:57,381 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:00:57,382 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e8196ca3e7f8da6be63ed057317b8a370ba560e11740ea9a51451f140c434c1 [2023-11-06 22:00:57,666 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:00:57,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:00:57,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:00:57,710 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:00:57,710 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:00:57,712 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i [2023-11-06 22:01:00,881 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:01:01,130 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:01:01,130 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i [2023-11-06 22:01:01,141 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/data/48f13c30b/eecfb09ab3a14d1b9921fe022e118913/FLAG7eaa8be00 [2023-11-06 22:01:01,159 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/data/48f13c30b/eecfb09ab3a14d1b9921fe022e118913 [2023-11-06 22:01:01,162 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:01:01,163 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:01:01,165 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:01:01,165 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:01:01,171 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:01:01,172 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:01:01" (1/1) ... [2023-11-06 22:01:01,173 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53a6ef42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:01, skipping insertion in model container [2023-11-06 22:01:01,174 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:01:01" (1/1) ... [2023-11-06 22:01:01,199 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:01:01,355 WARN L240 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_764192a3-964a-4952-a8a9-fe0dc6418fba/sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i[820,833] [2023-11-06 22:01:01,373 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:01:01,382 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:01:01,396 WARN L240 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_764192a3-964a-4952-a8a9-fe0dc6418fba/sv-benchmarks/c/array-examples/sorting_bubblesort_2_ground.i[820,833] [2023-11-06 22:01:01,405 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:01:01,422 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:01:01,422 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:01 WrapperNode [2023-11-06 22:01:01,423 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:01:01,424 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:01:01,424 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:01:01,425 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:01:01,431 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:01" (1/1) ... [2023-11-06 22:01:01,439 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:01" (1/1) ... [2023-11-06 22:01:01,458 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2023-11-06 22:01:01,458 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:01:01,459 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:01:01,459 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:01:01,459 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:01:01,470 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:01" (1/1) ... [2023-11-06 22:01:01,470 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:01" (1/1) ... [2023-11-06 22:01:01,473 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:01" (1/1) ... [2023-11-06 22:01:01,474 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:01" (1/1) ... [2023-11-06 22:01:01,480 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:01" (1/1) ... [2023-11-06 22:01:01,485 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:01" (1/1) ... [2023-11-06 22:01:01,486 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:01" (1/1) ... [2023-11-06 22:01:01,487 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:01" (1/1) ... [2023-11-06 22:01:01,490 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:01:01,491 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:01:01,492 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:01:01,492 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:01:01,493 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:01" (1/1) ... [2023-11-06 22:01:01,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:01:01,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:01,537 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:01:01,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:01:01,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:01:01,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:01:01,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 22:01:01,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 22:01:01,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:01:01,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:01:01,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 22:01:01,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 22:01:01,670 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:01:01,673 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:01:01,859 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:01:01,866 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:01:01,867 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-06 22:01:01,869 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:01:01 BoogieIcfgContainer [2023-11-06 22:01:01,869 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:01:01,872 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:01:01,873 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:01:01,876 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:01:01,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:01:01" (1/3) ... [2023-11-06 22:01:01,877 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7134f66e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:01:01, skipping insertion in model container [2023-11-06 22:01:01,877 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:01:01" (2/3) ... [2023-11-06 22:01:01,878 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7134f66e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:01:01, skipping insertion in model container [2023-11-06 22:01:01,878 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:01:01" (3/3) ... [2023-11-06 22:01:01,880 INFO L112 eAbstractionObserver]: Analyzing ICFG sorting_bubblesort_2_ground.i [2023-11-06 22:01:01,907 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:01:01,908 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:01:01,988 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:01:01,996 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@3e1f217e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:01:01,997 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:01:02,002 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:02,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 22:01:02,010 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:02,011 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:02,012 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:02,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:02,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1961330543, now seen corresponding path program 1 times [2023-11-06 22:01:02,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:02,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146950193] [2023-11-06 22:01:02,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:02,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:02,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:02,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146950193] [2023-11-06 22:01:02,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146950193] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:01:02,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:01:02,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:01:02,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729377338] [2023-11-06 22:01:02,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:02,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:01:02,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:02,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:01:02,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:01:02,430 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:02,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:02,505 INFO L93 Difference]: Finished difference Result 44 states and 66 transitions. [2023-11-06 22:01:02,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:01:02,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-06 22:01:02,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:02,517 INFO L225 Difference]: With dead ends: 44 [2023-11-06 22:01:02,517 INFO L226 Difference]: Without dead ends: 21 [2023-11-06 22:01:02,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:01:02,524 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:01:02,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 48 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:01:02,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-06 22:01:02,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2023-11-06 22:01:02,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:02,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2023-11-06 22:01:02,563 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 10 [2023-11-06 22:01:02,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:02,563 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2023-11-06 22:01:02,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:02,564 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2023-11-06 22:01:02,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 22:01:02,565 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:02,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:02,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 22:01:02,566 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:02,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:02,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1306132977, now seen corresponding path program 1 times [2023-11-06 22:01:02,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:02,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698771969] [2023-11-06 22:01:02,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:02,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:02,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:02,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 22:01:02,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:02,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698771969] [2023-11-06 22:01:02,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698771969] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:02,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193687528] [2023-11-06 22:01:02,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:02,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:02,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:02,729 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:02,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:01:02,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:02,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:01:02,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:02,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:01:02,827 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:01:02,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193687528] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:01:02,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:01:02,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-06 22:01:02,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973072757] [2023-11-06 22:01:02,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:02,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:01:02,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:02,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:01:02,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:01:02,838 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:02,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:02,857 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2023-11-06 22:01:02,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:01:02,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-06 22:01:02,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:02,859 INFO L225 Difference]: With dead ends: 34 [2023-11-06 22:01:02,859 INFO L226 Difference]: Without dead ends: 25 [2023-11-06 22:01:02,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:01:02,861 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 5 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:01:02,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 47 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:01:02,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-06 22:01:02,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-06 22:01:02,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:02,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2023-11-06 22:01:02,868 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 12 [2023-11-06 22:01:02,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:02,868 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2023-11-06 22:01:02,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:02,869 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2023-11-06 22:01:02,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-06 22:01:02,869 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:02,870 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:02,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:03,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:03,077 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:03,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:03,078 INFO L85 PathProgramCache]: Analyzing trace with hash 735433629, now seen corresponding path program 1 times [2023-11-06 22:01:03,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:03,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879162087] [2023-11-06 22:01:03,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:03,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:03,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:03,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:01:03,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:03,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879162087] [2023-11-06 22:01:03,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879162087] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:03,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827000918] [2023-11-06 22:01:03,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:03,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:03,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:03,190 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:03,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:01:03,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:03,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:01:03,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 22:01:03,286 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:01:03,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827000918] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:01:03,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 22:01:03,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-11-06 22:01:03,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607041726] [2023-11-06 22:01:03,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:01:03,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:01:03,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:03,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:01:03,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:01:03,289 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:03,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:03,310 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2023-11-06 22:01:03,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:01:03,310 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-06 22:01:03,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:03,311 INFO L225 Difference]: With dead ends: 48 [2023-11-06 22:01:03,312 INFO L226 Difference]: Without dead ends: 29 [2023-11-06 22:01:03,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-06 22:01:03,314 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:01:03,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 38 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:01:03,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-06 22:01:03,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2023-11-06 22:01:03,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:03,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2023-11-06 22:01:03,321 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 33 transitions. Word has length 15 [2023-11-06 22:01:03,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:03,322 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 33 transitions. [2023-11-06 22:01:03,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:03,322 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 33 transitions. [2023-11-06 22:01:03,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 22:01:03,323 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:03,323 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:03,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:03,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:03,530 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:03,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:03,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1537360201, now seen corresponding path program 1 times [2023-11-06 22:01:03,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:03,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614948848] [2023-11-06 22:01:03,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:03,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:03,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:03,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:01:03,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:03,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614948848] [2023-11-06 22:01:03,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614948848] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:03,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152985544] [2023-11-06 22:01:03,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:03,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:03,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:03,675 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:03,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:01:03,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:03,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:01:03,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:03,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:01:03,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:03,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:01:03,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152985544] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:01:03,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:01:03,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-06 22:01:03,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179259000] [2023-11-06 22:01:03,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:01:03,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:01:03,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:03,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:01:03,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:01:03,880 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:03,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:03,931 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2023-11-06 22:01:03,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 22:01:03,934 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-06 22:01:03,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:03,937 INFO L225 Difference]: With dead ends: 53 [2023-11-06 22:01:03,938 INFO L226 Difference]: Without dead ends: 32 [2023-11-06 22:01:03,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:01:03,943 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:01:03,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 60 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:01:03,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-06 22:01:03,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-06 22:01:03,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:03,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2023-11-06 22:01:03,960 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 18 [2023-11-06 22:01:03,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:03,961 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2023-11-06 22:01:03,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:03,961 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2023-11-06 22:01:03,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-06 22:01:03,963 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:03,963 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:03,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:04,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:04,170 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:04,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:04,170 INFO L85 PathProgramCache]: Analyzing trace with hash 60072271, now seen corresponding path program 2 times [2023-11-06 22:01:04,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:04,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459627862] [2023-11-06 22:01:04,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:04,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:04,264 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 22:01:04,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:04,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459627862] [2023-11-06 22:01:04,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459627862] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:04,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585381633] [2023-11-06 22:01:04,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:01:04,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:04,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:04,267 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:04,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:01:04,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:01:04,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:01:04,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:01:04,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:04,447 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:01:04,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:04,560 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-06 22:01:04,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585381633] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:01:04,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:01:04,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-11-06 22:01:04,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531811158] [2023-11-06 22:01:04,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:01:04,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:01:04,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:04,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:01:04,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:01:04,589 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:04,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:04,699 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2023-11-06 22:01:04,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-06 22:01:04,705 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-06 22:01:04,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:04,708 INFO L225 Difference]: With dead ends: 74 [2023-11-06 22:01:04,711 INFO L226 Difference]: Without dead ends: 53 [2023-11-06 22:01:04,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:01:04,713 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:01:04,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 115 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:01:04,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-06 22:01:04,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2023-11-06 22:01:04,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:04,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2023-11-06 22:01:04,721 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 24 [2023-11-06 22:01:04,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:04,722 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2023-11-06 22:01:04,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:04,722 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2023-11-06 22:01:04,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-06 22:01:04,723 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:04,724 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:04,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:04,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:04,934 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:04,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:04,935 INFO L85 PathProgramCache]: Analyzing trace with hash 2139379787, now seen corresponding path program 3 times [2023-11-06 22:01:04,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:04,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583571471] [2023-11-06 22:01:04,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:04,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:05,134 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-06 22:01:05,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:05,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583571471] [2023-11-06 22:01:05,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583571471] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:05,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753612652] [2023-11-06 22:01:05,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:01:05,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:05,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:05,137 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:05,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:01:05,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-06 22:01:05,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:01:05,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 22:01:05,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-06 22:01:05,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:05,308 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-06 22:01:05,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753612652] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:01:05,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:01:05,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-11-06 22:01:05,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878491427] [2023-11-06 22:01:05,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:01:05,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 22:01:05,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:05,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 22:01:05,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:01:05,317 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:05,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:05,378 INFO L93 Difference]: Finished difference Result 98 states and 129 transitions. [2023-11-06 22:01:05,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:01:05,379 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-06 22:01:05,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:05,386 INFO L225 Difference]: With dead ends: 98 [2023-11-06 22:01:05,386 INFO L226 Difference]: Without dead ends: 73 [2023-11-06 22:01:05,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:01:05,390 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:01:05,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 59 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:01:05,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-06 22:01:05,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-11-06 22:01:05,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 72 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:05,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2023-11-06 22:01:05,408 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 39 [2023-11-06 22:01:05,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:05,409 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2023-11-06 22:01:05,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:05,409 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2023-11-06 22:01:05,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-06 22:01:05,411 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:05,411 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:05,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:05,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:05,618 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:05,618 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:05,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1707834293, now seen corresponding path program 4 times [2023-11-06 22:01:05,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:05,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063918891] [2023-11-06 22:01:05,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:05,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:05,996 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-06 22:01:05,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:05,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063918891] [2023-11-06 22:01:05,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063918891] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:05,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452085811] [2023-11-06 22:01:05,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:01:05,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:05,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:05,998 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:06,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:01:06,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:01:06,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:01:06,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 22:01:06,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:06,177 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-06 22:01:06,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:06,452 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-06 22:01:06,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452085811] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:01:06,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:01:06,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-11-06 22:01:06,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792606721] [2023-11-06 22:01:06,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:01:06,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-06 22:01:06,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:06,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-06 22:01:06,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:01:06,456 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:06,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:06,583 INFO L93 Difference]: Finished difference Result 147 states and 190 transitions. [2023-11-06 22:01:06,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-06 22:01:06,584 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-11-06 22:01:06,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:06,585 INFO L225 Difference]: With dead ends: 147 [2023-11-06 22:01:06,585 INFO L226 Difference]: Without dead ends: 97 [2023-11-06 22:01:06,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-11-06 22:01:06,587 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:01:06,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 98 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 22:01:06,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-06 22:01:06,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2023-11-06 22:01:06,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.1770833333333333) internal successors, (113), 96 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:06,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2023-11-06 22:01:06,599 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 51 [2023-11-06 22:01:06,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:06,599 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2023-11-06 22:01:06,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:06,600 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2023-11-06 22:01:06,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-06 22:01:06,602 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:06,603 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:06,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:06,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:06,809 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:06,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:06,809 INFO L85 PathProgramCache]: Analyzing trace with hash -56741325, now seen corresponding path program 5 times [2023-11-06 22:01:06,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:06,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411853326] [2023-11-06 22:01:06,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:06,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:06,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:07,661 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-06 22:01:07,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:07,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411853326] [2023-11-06 22:01:07,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411853326] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:07,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214939034] [2023-11-06 22:01:07,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:01:07,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:07,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:07,664 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:07,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:01:08,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2023-11-06 22:01:08,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:01:08,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:01:08,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:08,805 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-11-06 22:01:08,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:09,022 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 1 proven. 51 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-11-06 22:01:09,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214939034] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:01:09,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:01:09,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 39 [2023-11-06 22:01:09,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863700565] [2023-11-06 22:01:09,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:01:09,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-06 22:01:09,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:09,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-06 22:01:09,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2023-11-06 22:01:09,025 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 39 states, 39 states have (on average 2.6923076923076925) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:09,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:09,215 INFO L93 Difference]: Finished difference Result 198 states and 262 transitions. [2023-11-06 22:01:09,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-06 22:01:09,216 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6923076923076925) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-11-06 22:01:09,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:09,217 INFO L225 Difference]: With dead ends: 198 [2023-11-06 22:01:09,217 INFO L226 Difference]: Without dead ends: 148 [2023-11-06 22:01:09,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2023-11-06 22:01:09,219 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 35 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:01:09,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 150 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:01:09,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-06 22:01:09,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2023-11-06 22:01:09,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.226027397260274) internal successors, (179), 146 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:09,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 179 transitions. [2023-11-06 22:01:09,233 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 179 transitions. Word has length 75 [2023-11-06 22:01:09,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:09,233 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 179 transitions. [2023-11-06 22:01:09,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.6923076923076925) internal successors, (105), 39 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:09,234 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 179 transitions. [2023-11-06 22:01:09,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-06 22:01:09,236 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:09,236 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:09,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:09,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-06 22:01:09,444 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:09,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:09,444 INFO L85 PathProgramCache]: Analyzing trace with hash -315531791, now seen corresponding path program 6 times [2023-11-06 22:01:09,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:09,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102568792] [2023-11-06 22:01:09,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:09,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:09,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:10,299 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-11-06 22:01:10,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:10,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102568792] [2023-11-06 22:01:10,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102568792] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:10,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434602824] [2023-11-06 22:01:10,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-06 22:01:10,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:10,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:10,302 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:10,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:01:11,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2023-11-06 22:01:11,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:01:11,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 22:01:11,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:12,427 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2023-11-06 22:01:12,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 1 proven. 287 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2023-11-06 22:01:13,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434602824] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:01:13,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:01:13,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 17, 17] total 56 [2023-11-06 22:01:13,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060570801] [2023-11-06 22:01:13,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:01:13,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-06 22:01:13,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:13,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-06 22:01:13,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=2260, Unknown=0, NotChecked=0, Total=3080 [2023-11-06 22:01:13,108 INFO L87 Difference]: Start difference. First operand 147 states and 179 transitions. Second operand has 56 states, 56 states have (on average 2.767857142857143) internal successors, (155), 56 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:13,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:13,446 INFO L93 Difference]: Finished difference Result 344 states and 472 transitions. [2023-11-06 22:01:13,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-06 22:01:13,446 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.767857142857143) internal successors, (155), 56 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2023-11-06 22:01:13,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:13,450 INFO L225 Difference]: With dead ends: 344 [2023-11-06 22:01:13,450 INFO L226 Difference]: Without dead ends: 246 [2023-11-06 22:01:13,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=820, Invalid=2260, Unknown=0, NotChecked=0, Total=3080 [2023-11-06 22:01:13,458 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 83 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:01:13,459 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 228 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:01:13,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-11-06 22:01:13,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2023-11-06 22:01:13,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.2663934426229508) internal successors, (309), 244 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:13,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 309 transitions. [2023-11-06 22:01:13,493 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 309 transitions. Word has length 101 [2023-11-06 22:01:13,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:13,493 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 309 transitions. [2023-11-06 22:01:13,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.767857142857143) internal successors, (155), 56 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:13,494 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 309 transitions. [2023-11-06 22:01:13,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-06 22:01:13,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:13,506 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:13,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:13,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:13,715 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:13,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:13,715 INFO L85 PathProgramCache]: Analyzing trace with hash 150161967, now seen corresponding path program 7 times [2023-11-06 22:01:13,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:13,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966062536] [2023-11-06 22:01:13,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:13,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:13,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:14,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-11-06 22:01:14,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:14,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966062536] [2023-11-06 22:01:14,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966062536] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:14,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056707848] [2023-11-06 22:01:14,850 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-06 22:01:14,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:14,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:14,853 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:14,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:01:15,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:15,055 INFO L262 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 22:01:15,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:15,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-11-06 22:01:15,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:16,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-11-06 22:01:16,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056707848] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:01:16,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:01:16,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2023-11-06 22:01:16,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805092302] [2023-11-06 22:01:16,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:01:16,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-06 22:01:16,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:16,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-06 22:01:16,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-11-06 22:01:16,306 INFO L87 Difference]: Start difference. First operand 245 states and 309 transitions. Second operand has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:16,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:16,516 INFO L93 Difference]: Finished difference Result 491 states and 644 transitions. [2023-11-06 22:01:16,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-06 22:01:16,517 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2023-11-06 22:01:16,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:16,520 INFO L225 Difference]: With dead ends: 491 [2023-11-06 22:01:16,520 INFO L226 Difference]: Without dead ends: 297 [2023-11-06 22:01:16,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-11-06 22:01:16,523 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 22:01:16,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 60 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 22:01:16,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-11-06 22:01:16,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2023-11-06 22:01:16,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 1.2195945945945945) internal successors, (361), 296 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:16,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 361 transitions. [2023-11-06 22:01:16,536 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 361 transitions. Word has length 151 [2023-11-06 22:01:16,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:16,537 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 361 transitions. [2023-11-06 22:01:16,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.207547169811321) internal successors, (117), 53 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:16,537 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 361 transitions. [2023-11-06 22:01:16,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-06 22:01:16,540 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:16,540 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:16,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:16,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:01:16,747 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:16,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:16,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1092106235, now seen corresponding path program 8 times [2023-11-06 22:01:16,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:16,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079359386] [2023-11-06 22:01:16,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:16,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:16,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:20,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3836 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-11-06 22:01:20,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:20,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079359386] [2023-11-06 22:01:20,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079359386] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:20,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299946786] [2023-11-06 22:01:20,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 22:01:20,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:20,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:20,029 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:20,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:01:20,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-06 22:01:20,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:01:20,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-06 22:01:20,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3836 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-11-06 22:01:20,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3836 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-11-06 22:01:24,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299946786] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:01:24,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:01:24,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 105 [2023-11-06 22:01:24,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768056276] [2023-11-06 22:01:24,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:01:24,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2023-11-06 22:01:24,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:24,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2023-11-06 22:01:24,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2023-11-06 22:01:24,406 INFO L87 Difference]: Start difference. First operand 297 states and 361 transitions. Second operand has 105 states, 105 states have (on average 2.104761904761905) internal successors, (221), 105 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:24,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:24,861 INFO L93 Difference]: Finished difference Result 595 states and 774 transitions. [2023-11-06 22:01:24,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-11-06 22:01:24,862 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.104761904761905) internal successors, (221), 105 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2023-11-06 22:01:24,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:24,865 INFO L225 Difference]: With dead ends: 595 [2023-11-06 22:01:24,865 INFO L226 Difference]: Without dead ends: 401 [2023-11-06 22:01:24,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2023-11-06 22:01:24,870 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 22:01:24,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 60 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 22:01:24,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2023-11-06 22:01:24,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2023-11-06 22:01:24,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.1625) internal successors, (465), 400 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:24,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 465 transitions. [2023-11-06 22:01:24,892 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 465 transitions. Word has length 203 [2023-11-06 22:01:24,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:24,893 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 465 transitions. [2023-11-06 22:01:24,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.104761904761905) internal successors, (221), 105 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:24,894 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 465 transitions. [2023-11-06 22:01:24,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2023-11-06 22:01:24,899 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:24,900 INFO L195 NwaCegarLoop]: trace histogram [102, 102, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:24,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:25,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:25,114 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:25,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:25,114 INFO L85 PathProgramCache]: Analyzing trace with hash -696784493, now seen corresponding path program 9 times [2023-11-06 22:01:25,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:25,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718436118] [2023-11-06 22:01:25,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:25,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:34,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11740 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2023-11-06 22:01:34,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:34,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718436118] [2023-11-06 22:01:34,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718436118] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:34,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802552520] [2023-11-06 22:01:34,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 22:01:34,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:34,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:34,219 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:34,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:01:42,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2023-11-06 22:01:42,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:01:42,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-06 22:01:42,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 11740 backedges. 204 proven. 1335 refuted. 0 times theorem prover too weak. 10201 trivial. 0 not checked. [2023-11-06 22:01:45,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:01:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11740 backedges. 1 proven. 1335 refuted. 0 times theorem prover too weak. 10404 trivial. 0 not checked. [2023-11-06 22:01:47,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802552520] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:01:47,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:01:47,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 35, 33] total 169 [2023-11-06 22:01:47,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341039651] [2023-11-06 22:01:47,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:01:47,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 169 states [2023-11-06 22:01:47,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:01:47,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2023-11-06 22:01:47,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7686, Invalid=20706, Unknown=0, NotChecked=0, Total=28392 [2023-11-06 22:01:47,850 INFO L87 Difference]: Start difference. First operand 401 states and 465 transitions. Second operand has 169 states, 169 states have (on average 2.437869822485207) internal successors, (412), 169 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:49,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:01:49,018 INFO L93 Difference]: Finished difference Result 791 states and 1048 transitions. [2023-11-06 22:01:49,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2023-11-06 22:01:49,019 INFO L78 Accepts]: Start accepts. Automaton has has 169 states, 169 states have (on average 2.437869822485207) internal successors, (412), 169 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 307 [2023-11-06 22:01:49,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:01:49,023 INFO L225 Difference]: With dead ends: 791 [2023-11-06 22:01:49,024 INFO L226 Difference]: Without dead ends: 597 [2023-11-06 22:01:49,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 717 GetRequests, 550 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6448 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=7686, Invalid=20706, Unknown=0, NotChecked=0, Total=28392 [2023-11-06 22:01:49,030 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 263 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:01:49,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 195 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:01:49,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2023-11-06 22:01:49,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 597. [2023-11-06 22:01:49,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 1.2164429530201342) internal successors, (725), 596 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:49,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 725 transitions. [2023-11-06 22:01:49,054 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 725 transitions. Word has length 307 [2023-11-06 22:01:49,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:01:49,055 INFO L495 AbstractCegarLoop]: Abstraction has 597 states and 725 transitions. [2023-11-06 22:01:49,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 169 states, 169 states have (on average 2.437869822485207) internal successors, (412), 169 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:01:49,055 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 725 transitions. [2023-11-06 22:01:49,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2023-11-06 22:01:49,063 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:01:49,064 INFO L195 NwaCegarLoop]: trace histogram [104, 104, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:01:49,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 22:01:49,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:49,264 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:01:49,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:01:49,265 INFO L85 PathProgramCache]: Analyzing trace with hash 421405071, now seen corresponding path program 10 times [2023-11-06 22:01:49,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:01:49,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719946369] [2023-11-06 22:01:49,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:01:49,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:01:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:01:58,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16552 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 5736 trivial. 0 not checked. [2023-11-06 22:01:58,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:01:58,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719946369] [2023-11-06 22:01:58,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719946369] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:01:58,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853617294] [2023-11-06 22:01:58,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-06 22:01:58,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:01:58,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:01:58,648 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:01:58,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:01:59,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-06 22:01:59,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 22:01:59,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 1492 conjuncts, 106 conjunts are in the unsatisfiable core [2023-11-06 22:01:59,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:01:59,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16552 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 5736 trivial. 0 not checked. [2023-11-06 22:01:59,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:02:13,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16552 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 5736 trivial. 0 not checked. [2023-11-06 22:02:13,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853617294] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:02:13,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 22:02:13,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107, 107] total 213 [2023-11-06 22:02:13,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404477585] [2023-11-06 22:02:13,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 22:02:13,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2023-11-06 22:02:13,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:02:13,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2023-11-06 22:02:13,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2023-11-06 22:02:13,534 INFO L87 Difference]: Start difference. First operand 597 states and 725 transitions. Second operand has 213 states, 213 states have (on average 2.051643192488263) internal successors, (437), 213 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:15,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:02:15,065 INFO L93 Difference]: Finished difference Result 1195 states and 1556 transitions. [2023-11-06 22:02:15,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2023-11-06 22:02:15,073 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 2.051643192488263) internal successors, (437), 213 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 407 [2023-11-06 22:02:15,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:02:15,082 INFO L225 Difference]: With dead ends: 1195 [2023-11-06 22:02:15,083 INFO L226 Difference]: Without dead ends: 809 [2023-11-06 22:02:15,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 919 GetRequests, 708 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2023-11-06 22:02:15,089 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 2 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:02:15,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 174 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 22:02:15,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2023-11-06 22:02:15,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 809. [2023-11-06 22:02:15,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 1.1596534653465347) internal successors, (937), 808 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:15,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 937 transitions. [2023-11-06 22:02:15,122 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 937 transitions. Word has length 407 [2023-11-06 22:02:15,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:02:15,123 INFO L495 AbstractCegarLoop]: Abstraction has 809 states and 937 transitions. [2023-11-06 22:02:15,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 2.051643192488263) internal successors, (437), 213 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 22:02:15,123 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 937 transitions. [2023-11-06 22:02:15,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 620 [2023-11-06 22:02:15,141 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:02:15,141 INFO L195 NwaCegarLoop]: trace histogram [210, 210, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 22:02:15,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:02:15,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:15,361 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:02:15,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:02:15,362 INFO L85 PathProgramCache]: Analyzing trace with hash 490096315, now seen corresponding path program 11 times [2023-11-06 22:02:15,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:02:15,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623554534] [2023-11-06 22:02:15,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:02:15,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:02:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:02:49,863 INFO L134 CoverageAnalysis]: Checked inductivity of 49836 backedges. 0 proven. 44100 refuted. 0 times theorem prover too weak. 5736 trivial. 0 not checked. [2023-11-06 22:02:49,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:02:49,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623554534] [2023-11-06 22:02:49,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623554534] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 22:02:49,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135339760] [2023-11-06 22:02:49,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-06 22:02:49,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:02:49,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:02:49,869 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:02:49,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_764192a3-964a-4952-a8a9-fe0dc6418fba/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process